SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual

SPECIFICATIONS Procedure revision date: 05/15/2009

Material
Item Specification Fill Capacity
Cooling System WSS- —
Stop Leak Pellets M99B37-B6
VC-6
Motorcraft WSS- 2.3L engine w/manual
Premium Gold M97B51-A1 trans — 6.6L (6.9 qt),
Engine Coolant 2.3L engine w/auto trans
with Bittering Agent — 7.6L (8.0 qt) 3.0L
(US only) engine — 10.0L (10.5 qt)
VC-7-B (US); CVC-
7-A (Canada); or
equivalent (yellow
color)
Premium Cooling ESR-M14P7- —
System Flush A
VC-1

General Specifications
Item Specification
Pressure Tests
Complete cooling system maximum pressure 150 kPa (21.7 psi)
Pressure relief cap 120 kPa (17.4 psi) to 150 kPa (21.7 psi)
Radiator (out of vehicle) 138 kPa (20 psi)
Thermostat Opening Temperatures
Thermostat starts to open (2.3L) 90°C (194°F)
Thermostat starts to open (3.0L 4V) 84°C-88°C (183°F-190°F)
Thermostat fully open (2.3L) 106°C (223°F)
Thermostat fully open (3.0L 4V) 98.9°C (210°F)

Torque Specifications
Description Nm lb-ft lb-in
A/C condenser-to-radiator bolts 8 — 71
Block heater (2.3L) 40 30 —
Block heater (3.0L) 25 18 —
Bypass tube bolt and stud bolt (3.0L) 10 — 89
Center support bolt 10 — 89
Center support nuts 10 — 89
Coolant pump bolts 10 — 89
Coolant pump pulley bolts 20 15 —
Cooling fan bolts 8 — 71
Degas bottle-to-fender nut 6 — 53
Front grille bolts 10 — 89
Hood latch bolts 9 — 80
Hood latch nut 9 — 80
Radiator bracket bolts 10 — 89
Thermostat housing bolts 10 — 89
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
DESCRIPTION AND OPERATION Procedure revision date: 01/10/2007

Engine Cooling

CAUTION: The engine cooling system is filled with Motorcraft Premium Gold Engine Coolant.
Mixing coolant types degrades the corrosion protection of Motorcraft Premium Gold Engine Coolant.

NOTE: The addition of Cooling System Stop Leak Pellets VC-6 or equivalent meeting Ford specification WSS-
M99B37-B6 darkens Motorcraft Premium Gold Engine Coolant from yellow to golden tan.

The cooling system consists of the following components:

 Radiator
 Bypass tube
 Pressure relief cap
 Degas bottle
 Radiator draincock
 Coolant pump
 Coolant temperature indicator sender unit
 Thermostat housing

Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion protection to the
engine and cooling components. In order to obtain these protections, the engine coolant must be maintained at
the correct concentration and fluid level in the degas bottle.

When adding engine coolant, use a 50/50 mixture of engine coolant and distilled water.

To maintain the integrity of the coolant and the cooling system:

 Add Motorcraft Premium Gold Engine Coolant or equivalent meeting Ford Specification WSS-M97B51-
A1 (yellow color). Do not mix coolant types.
 Do not add/mix orange-colored Motorcraft Specialty Orange Engine Coolant or equivalent meeting Ford
specification WSS-M97B44-D or green colored Motorcraft Premium Engine Coolant meeting Ford
specification ESE-M97B44-A or equivalent. Mixing coolants may degrade the coolant's corrosion
protection.
 Do not add alcohol, methanol, brine or any engine coolants mixed with alcohol or methanol antifreeze.
These can cause engine damage from overheating or freezing.
 Do not mix with recycled coolant unless it meets the requirements of Ford specification WSS-M97B51-
A1. Not all coolant recycling processes meet this Ford specification. Use of such a coolant may harm
the engine and cooling system components.

Coolant Flow Diagram, 2.3L

NOTE: Black arrows indicate hot, white arrows indicate cold.

Item Part Number Description
1 8A080 Degas bottle
2 8C633 Degas bottle-to-radiator hose
3 8W005 Degas bottle overflow hose
4 8501 Coolant pump
5 6010 Engine block
6 8575 Thermostat housing
7 8B273 Lower radiator hose
8 8005 Radiator
9 8B274 Upper radiator hose
10 8A582 Coolant bypass hose
11 9D475 Exhaust gas recirculation (EGR) valve assembly
12 8K556 Coolant adapter assembly
13 18K580 Heater outlet hose
14 18K579 Heater inlet hose
15 18A458 Heater assembly
16 6049 Cylinder head
17 6051 Head gasket
18 8C362 Bleed valve
Coolant Flow Diagram, 3.0L

NOTE: Black arrows indicate hot, white arrows indicate cold.

Item Part Number Description

1 8A080 Degas bottle
2 8C633 Degas bottle-to-radiator hose
3 8W005 Radiator overflow hose
4 6010 Engine block
5 8501 Coolant pump
6 8B274 Upper radiator hose
7 8005 Radiator
8 8B273 Lower radiator hose
9 6050 Cylinder head
10 6083 Head gasket
11 8A586 Thermostat housing
12 8548 Bypass tube
13 8A505 Coolant inlet tube
14 18K579 Heater inlet hose
15 18K580 Heater outlet hose
16 9E926 Throttle body
17 18C553 Coolant pump-to-throttle body hose
18 18458 Heater assembly
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
DIAGNOSIS AND TESTING Procedure revision date: 10/07/2008

Engine Cooling

Special Tool(s)
Coolant/Battery Refractometer
023-00164 or equivalent

Fluke 77-IV Digital Multimeter

FLU77-4 or equivalent

Pressure Test Kit

014-R1072 or equivalent

Vehicle Communication Module

(VCM) and Integrated Diagnostic
System (IDS) software with
appropriate hardware or
equivalent scan tool

Material
Item Specification
Motorcraft® Premium Gold Engine WSS-M97B51-
Coolant with Bittering Agent A1
(bittered in US only)
VC-7-B (US); CVC-7-A (Canada);
or equivalent (yellow color)

Principles of Operation

Engine coolant flows primarily from the engine to the radiator circuit and back to the coolant pump. From the
coolant pump, coolant is sent through the engine block and cylinder heads. A separate circuit from the
engine also feeds the heater core with coolant. The coolant pump is operated by engine rotation through a
pulley which is driven by a drive belt to circulate the coolant. The coolant thermostat is a control valve
actuated by coolant temperature. When the thermostat is closed, coolant flow bypasses the radiator circuit
and returns to the coolant pump. When the thermostat is opened, coolant is allowed to flow through the
radiator circuit in order to transfer engine generated heat to the outside air.
The degas bottle holds surplus coolant and removes air from the cooling system, which reduces hot spots. It
also allows for coolant expansion and system pressurization, replenishes coolant to the cooling system and
serves as the location for service fill.

The cooling fan draws air through the radiator to help cool the system coolant as it passes through the
radiator.

The thermostat monitor is a function of the PCM and is designed to verify correct thermostat operation. The
monitor will be executed once per drive cycle and has a monitor run duration of 300-800 seconds. If a
malfunction occurs, DTC P0125 or P0128 is set, and the malfunction indicator lamp will be illuminated.

For vehicle/engine specific information, refer to Engine Cooling in the Description and Operation portion of
this section.

Inspection and Verification

WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew
the coolant pressure relief cap when the engine is operating or the cooling system is hot. The
cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is
loosened slightly. Failure to follow these instructions may result in serious personal injury.

NOTICE: The engine cooling system is filled with Motorcraft Premium Gold Engine Coolant. Mixing
coolant types degrades the corrosion protection of Motorcraft Premium Gold Engine Coolant.

NOTE: Vehicles have the pressure relief cap on the degas bottle and no radiator cap.

1. Verify the customer concern.

2. Visually check the engine coolant level at the degas bottle when the system is cold.

3. Make sure the pressure relief cap is installed correctly.

4. Record any cooling system DTCs retrieved. Refer to the DTC Chart in this section for DTC
descriptions.

5. NOTE: Take note of any coolant odor or steam coming from cooling system components.

If the system coolant is filled correctly and no DTCs associated with fail-safe cooling are retrieved,
verify the customer concern by operating the engine to duplicate the condition.

6. NOTE: Refer to the coolant flow diagram in the Description and Operation, Engine Cooling portion of
this section.

Inspect to determine if any of the following mechanical or electrical concerns apply.

Visual Inspection Chart

Mechanical Electrical
 Leaks or weeps at:  Inoperative or damaged:
 Hoses  Electric cooling fan
  Tubes  Wiring, connectors, relays or modules
 Clamp joints  Engine Coolant Temperature (ECT)
 Gaskets sensor (if equipped)
 O-rings  Cylinder Head Temperature (CHT) sensor
 Thermostat housing (if equipped)
 Radiator  Vehicle Speed Sensor (VSS) sensor
 Pressure relief cap
 Coolant pump
 Heater core (wet floor or coolant
odor in vehicle)
 Degas bottle
 Cylinder block core plugs
 Cylinder head core plugs
 Block heater (if equipped)

Visual Inspection Chart

Mechanical Electrical
 Cracked or damaged:
 Hoses
 Tubes
 Hose clamps
 Thermostat housing
 Radiator
 Pressure relief cap
 Cooling fan
 Coolant pump
 Degas bottle
 Cylinder block core plugs
 Cylinder head core plugs
 Block heater (if equipped)
 Restricted airflow through the A/C condenser/radiator
 Drive belt loose, worn or installed incorrectly
 Broken or weak drive belt tensioner
 Excessive white or light gray exhaust smoke (may have burnt coolant odor)
 Coolant in engine oil
 Engine oil in coolant

7. If the inspection reveals an obvious concern that can be readily identified, repair it as necessary. Test
the system for normal operation.

8. Inspect the coolant condition.

1. Inspect the coolant color.
 If Motorcraft Premium Gold Engine Coolant has a clear or pale yellow color, this
indicates higher water content than required. Test the engine coolant freezing point
range with the Coolant/Battery Refractometer. The freezing point should be in the range
-45°C to -23°C (-50°F to -10°F). If the vehicle is driven in cold climates less than -36°C
(-34°F), it may be necessary to increase the coolant concentration to get adequate
freeze protection. Recommended coolant concentration is 50/50 ethylene glycol to
distilled water.
 A pale green color indicates incorrect coolant (green in color) may have been added to
the system. Use of incorrect (green in color) coolant degrades the corrosion protection
of Motorcraft Premium Gold Engine Coolant. Flush the system and refill with the correct
mixture of distilled water and Motorcraft Premium Gold Engine Coolant.
 NOTE: If Cooling System Stop Leak Pellets are used, darkening of the Motorcraft
 Premium Gold Engine Coolant from yellow to golden tan will occur.

Dark brown could indicate a commercially available stop leak may have been used.
Flush the system and refill with the correct mixture of distilled water and Motorcraft
Premium Gold Engine Coolant.
 A light or reddish brown color indicates that rust may be present in the cooling system.
Flush the system and refill with the correct mixture of distilled water and Motorcraft
Premium Gold Engine Coolant.
 An iridescent sheen on top of the coolant could indicate a trace of oil is entering the
system. For information on engine diagnosis, refer to Section 303-00 .
 A milky brown color may indicate that engine oil is entering the cooling system.
Pressure test the cooling system. Refer to component tests in this section. If engine oil
is suspected, the cause of the leak may be internal to the engine. Refer to Section 303-
00 .
2. If the engine coolant appearance is acceptable, test the engine coolant freezing point range
with the Coolant/Battery Refractometer. The freezing point should be in the range -45°C to -
23°C (-50°F to -10°F). If the vehicle is driven in cold climates less than -36°C (-34°F), it may be
necessary to increase the coolant concentration to get adequate freeze protection.
Recommended coolant concentration is 50/50 ethylene glycol to distilled water.
 Maximum coolant concentration is 60/40 for cold weather areas.
 Minimum coolant concentration is 40/60 for warm weather areas.
3. Adjust coolant range and level if necessary:
 If coolant is low, add specified coolant mixture only.
 If the engine coolant tests too weak, remove some of the engine coolant and add
undiluted engine coolant until the readings are within acceptable levels.
 If the engine coolant tests strong, remove some of the engine coolant and add distilled
water until the readings are within acceptable levels.

9. If an obvious cause for an observed or reported concern is found, correct the cause and test the
system for normal operation before proceeding to the next step.

10. NOTE: Make sure to use the latest scan tool software release.

If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).

11. NOTE: The Vehicle Communication Module (VCM) LED prove out confirms power and ground from
the DLC are provided to the VCM .

If the scan tool does not communicate with the VCM :

 check the VCM connection to the vehicle.
 check the scan tool connection to the VCM .
 refer to Section 418-00 , No Power To The Scan Tool, to diagnose no power to the scan tool.

12. If the scan tool does not communicate with the vehicle:
 verify the ignition key is in the ON position.
 verify the scan tool operation with a known good vehicle.
 refer to Section 418-00 to diagnose no response from the PCM.

13. Carry out the network test.

 If the scan tool responds with no communication for one or more modules, refer to Section
418-00 .
 If the network test passes, retrieve and record Continuous Memory Diagnostic Trouble Codes
(CMDTCs).
 14. Clear the CMDTCs and carry out the self-test diagnostics for the PCM.

15. If the DTCs recovered are related to the concern, go to the PCM DTC Chart. For all other DTCs, refer
to Section 419-10 .

16. If no DTCs related to the concern are retrieved, GO to Symptom Chart .

DTC Chart

PCM DTC Chart

DTC Description Action
P0217 Engine Coolant Over Temperature Condition GO to Pinpoint Test B .
P1285 Cylinder Head Over Temperature Condition GO to Pinpoint Test B .
P1299 Cylinder Head Over Temperature Protection GO to Pinpoint Test B .
Active
P0125 Insufficient Coolant Temperature For Closed GO to Pinpoint Test C .
Loop Fuel Control
P0128 Coolant Thermostat (Coolant Temperature Below GO to Pinpoint Test C .
Thermostat Regulating Temperature)
P0480 Fan Control (FC) Circuit 1, 2 or 3, respectively Refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual.
P0481

P0482
All Other — Refer to the Powertrain Control/Emissions
DTCs Diagnosis (PC/ED) manual.

Symptom Chart

Symptom Chart
Condition Possible Sources Action
 Loss of coolant  Coolant hoses or tubes  GO to Pinpoint Test A .
 Hose clamps
 Coolant pump O-ring
seal or gasket
 Thermostat O-ring seal
or gasket
 Thermostat housing
 Radiator
 Degas bottle
 Pressure relief cap
 Coolant pump leaking
from weep hole
 Heater core
 Engine gaskets (may
leak internally or
 externally)
 Cylinder block core plugs
 Cylinder head core plugs
 Block heater (if
equipped)
 The engine  Low coolant level  GO to Pinpoint Test B .
overheats  External engine coolant
leak
 Airlock in system
 Pressure relief cap
installation
 Restricted airflow through
the A/C
condenser/radiator
 Internal engine coolant
leak
 Coolant
condition/concentration
 Accessory drive
components
 Non-OEM engine
enhancement
components
 Electric cooling fan
 Radiator
 Thermostat
 Engine Coolant
Temperature (ECT)
sensor (if equipped)
 Cylinder Head
Temperature (CHT)
sensor (if equipped)
 Heater core
 Coolant pump
 Coolant flow restriction
 The engine does  Low coolant level  GO to Pinpoint Test C .
not reach normal  Thermostat
operating  Electric cooling fan
temperature always on
 ECT indicator system
(gauge)
 ECT sensor (if equipped)
 CHT sensor (if equipped)
 The block heater  Block heater power cable  CHECK continuity in all 3
does not operate power cable circuits. If any
correctly circuit measures greater
than 5 ohms, INSTALL a
new power cable.
 Block heater  CHECK the resistance of
the block heater. If the
resistance does not
measure between 12.5 and
17.0 ohms, INSTALL a new
block heater.
 The electric  Wiring  REFER to the Powertrain
cooling fan(s) is  Relays Control/Emissions
 inoperative in one  Fuses Diagnosis (PC/ED) manual.
or more speeds or  Fan Control (FC) module
does not operate  Cooling fan motor(s)
correctly (if  Cooling fan resistor(s)
equipped)
 The electric  Wiring  REFER to the Powertrain
cooling fan(s) stay  Relays Control/Emissions
(s) on all the time Diagnosis (PC/ED) manual.
(if equipped)
 Noisy electric  Foreign material  REMOVE the foreign
cooling fan contamination material from the cooling
operation  Fan motor fan and shroud. TEST the
system for normal
operation. If still noisy,
INSTALL a new cooling fan
assembly.
 Fan blade detached from  INSTALL a new cooling fan
fan motor assembly.

Pinpoint Tests

Pinpoint Test A: Loss of Coolant

Normal Operation

The engine cooling system is a closed system that provides for coolant expansion and contraction and also
changes in pressure as coolant warms and cools with engine operation. Various gaskets, seals, hoses and
clamps are used to contain coolant within the cooling system and keep other fluids and contaminants from
entering the cooling system.

Coolant loss can be attributed to either external or internal leaks anywhere within the cooling system.

For vehicle/engine specific information, refer to Engine Cooling in the Description and Operation portion of
this section.

This pinpoint test is intended to diagnose the following:

 Coolant hoses or tubes
 Hose clamps
 Thermostat O-ring seal or gasket
 Coolant pump O-ring seal or gasket
 Thermostat housing
 Radiator
 Pressure relief cap
 Coolant pump leaking from weep hole
 Heater core
 Engine gaskets
 Degas bottle
 Cylinder block core plugs
 Cylinder head core plugs
 Block heater (if equipped)
 Engine Coolant Temperature (ECT) sensor (if equipped)
PINPOINT TEST A: LOSS OF COOLANT

WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew
the coolant pressure relief cap when the engine is operating or the cooling system is hot. The
cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is
loosened slightly. Failure to follow these instructions may result in serious personal injury.

Test Step Result / Action to Take

A1 CARRY OUT INSPECTION AND VERIFICATION
 Carry out the Inspection and Verification procedure in this Yes
section. REPAIR as needed. TEST the
 Were any concerns found? system for normal operation.

No
GO to A2 .
A2 CHECK THE ENGINE COOLANT LEVEL

NOTE: Allow the engine to cool before checking the Yes

engine coolant level. GO to A3 .
 Ignition OFF. No
 Visually inspect the engine coolant level at the degas ADJUST the engine coolant level
bottle. as necessary. GO to A3 .
 Is the engine coolant level within specifications?
A3 PRESSURE TEST THE ENGINE COOLING SYSTEM
 Pressure test the engine cooling system. Refer to Yes
Component Tests, Cooling System Pressure Test in this REPAIR or INSTALL new
section. components. TEST the system for
 Does the engine cooling system leak? normal operation.

No
GO to A4 .
A4 CHECK THE ENGINE COOLANT FOR AN INTERNAL
LEAK
 Inspect the engine coolant in the degas bottle for signs of Yes
engine oil. If engine oil is evident, GO to
 Is engine oil evident in the coolant? Section 303-00 for engine
diagnosis.

No
GO to A5 .
A5 CHECK THE ENGINE OIL FOR COOLANT
 Remove the oil level indicator from the engine. Yes
 Is coolant evident in the oil? If coolant is in the engine oil, GO to
Section 303-00 for engine
diagnosis.

No
GO to A6 .
A6 CHECK THE COOLING SYSTEM FOR COMBUSTION
GASES
  NOTE: Use U-View® Combustion Leak Tester part Yes
number 560000 or equivalent. GO to Section 303-00 for engine
 Using a cooling system combustion gas leak tester, diagnosis.
following the instructions supplied with the tester, check
the coolant for combustion gases. No
 Are combustion gases present? The cooling system is operational.

Pinpoint Test B: The Engine Overheats

Normal Operation

The engine cooling system functions to maintain engine temperatures during operation. Proper coolant flow
through the engine, radiator and remainder of cooling system passages and components is essential to
maintaining a proper engine temperature.

Engine coolant flows primarily from the engine to the radiator circuit and back to the coolant pump. From the
coolant pump, coolant is sent through the engine block and cylinder heads. A separate circuit from the
engine also feeds the heater core with coolant. The coolant pump is operated by engine rotation through a
pulley which is driven by a drive belt to circulate the coolant. The coolant thermostat is a control valve
actuated by coolant temperature. When the thermostat is closed, coolant flow bypasses the radiator circuit
and returns to the coolant pump. When the thermostat is opened, coolant is allowed to flow through the
radiator circuit in order to transfer engine generated heat to the outside air.

Engine overheating generally occurs when there is a disruption in the ability to control either coolant flow at
the proper rate, the inability to transfer heat from the engine through the coolant (including low coolant), or
an inability to transfer engine generated heat to the outside air through the radiator.

For vehicle/engine specific information, refer to Engine Cooling in the Description and Operation portion of
this section.

 DTC P0217 Engine Coolant Over Temperature Condition

 DTC P1285 Cylinder Head Over Temperature Condition
 DTC P1299 Cylinder Head Over Temperature Protection Active

This pinpoint test is intended to diagnose the following:

 Low coolant level
 External engine coolant leak
 Airlock in system
 Pressure relief cap installation
 Restricted airflow through the A/C condenser/radiator
 Internal engine coolant leak
 Coolant condition/concentration
 Accessory drive components
 Non-OEM engine enhancement components
 Electric cooling fan
 Engine Coolant Temperature (ECT) indicator system (gauge)
 ECT sensor (if equipped)
 Cylinder Head Temperature (CHT) sensor (if equipped)
 Heater core
 Coolant pump
 Coolant flow restriction
PINPOINT TEST B: THE ENGINE OVERHEATS

WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew
the coolant pressure relief cap when the engine is operating or the cooling system is hot. The
cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is
loosened slightly. Failure to follow these instructions may result in serious personal injury.

Test Step Result / Action to Take

B1 CARRY OUT INSPECTION AND
VERIFICATION
 Carry out the Inspection and Yes
Verification procedure in this section. REPAIR as needed. TEST the system for normal
 Were any concerns found? operation.

No
GO to B2 .
B2 CHECK FOR DTCs
 NOTE: Refer to the Powertrain Yes
Control/Emissions Diagnosis (PC/ED) GO to B3 .
manual for correct scan tool hook-up
procedure. No
 Check for DTCs P0217, P1285 or Actual engine overheating has not been verified.
P1299. CHECK the engine coolant temperature gauge
 Is DTC P0217, P1285 or P1299 operation. REFER to Section 413-01 . If any other
present? DTCs are retrieved, REFER to the Powertrain
Control/Emissions Diagnosis (PC/ED) manual.
B3 CHECK FOR AN AIRFLOW
OBSTRUCTION
 Check the radiator or A/C condenser Yes
for an obstruction such as leaves or REMOVE the obstruction. TEST the system for normal
cardboard. operation.
 Is an obstruction present?
No
GO to B4 .
B4 CHECK THE ENGINE COOLANT
LEVEL

NOTE: Allow the engine to cool before Yes

checking the coolant level. GO to B5 .
 Ignition OFF. No
 Visually check the engine coolant level ADJUST the engine coolant level as necessary. GO to
in the degas bottle. B5 .
 Is the engine coolant level within
specification?
B5 PRESSURE TEST THE ENGINE
COOLING SYSTEM
 Pressure test the engine cooling Yes
system. Refer to Component Tests, REPAIR or INSTALL new components. TEST the
Cooling System Pressure Test in this system for normal operation.
section.
 Does the engine cooling system No
leak? GO to B6 .
 B6 CHECK THE ENGINE COOLANT FOR
AN INTERNAL LEAK
 Inspect the engine coolant in the Yes
degas bottle for signs of engine oil. If engine oil is evident, GO to Section 303-00 for
 Is engine oil evident in the coolant? engine diagnosis.

No
GO to B7 .
B7 CHECK THE ENGINE OIL FOR
COOLANT
 Remove the oil level indicator from the Yes
engine. If coolant is in the engine oil, GO to Section 303-00 for
 Is coolant evident in the oil? engine diagnosis.

No
GO to B8 .
B8 CHECK THE COOLING SYSTEM FOR
COMBUSTION GASES
 NOTE: Use U-View® Combustion Yes
Leak Tester part number 560000 or GO to Section 303-00 for engine diagnosis.
equivalent.
 Using a cooling system combustion No
gas leak tester, following the GO to B9 .
instructions supplied with the tester,
check the coolant for combustion
gases.
 Are combustion gases present?
B9 CHECK COOLANT CONDITION
 Check the coolant for dirt, rust or Yes
contamination and check the coolant GO to B10 .
concentration.
 Is the coolant condition OK? No
FLUSH the engine cooling system. REFER to Cooling
System Flushing in this section. TEST the system for
normal operation.
B10 CHECK THE ELECTRIC COOLING
FAN OPERATION
 Start the engine. Yes
 Place the climate control function GO to B11 .
selector in the MAX A/C position and
the blower motor switch in the HI No
position. DIAGNOSE the electric cooling fan operation. REFER
 Did the electric cooling fan to Powertrain Control/Emissions Diagnosis (PC/ED)
operate? manual.
B11 CHECK THE COOLANT PUMP
OPERATION
 Start the engine. Yes
 Allow the engine to run for 30 minutes. GO to B12 .
Place the climate control function
selector in the MAX HEAT position. No
Feel the heater outlet hose. INSTALL a new coolant pump. TEST the system for
 Is the heater outlet hose hot? normal operation.

B12 CHECK THE THERMOSTAT

OPERATION
 Start the engine. Yes
 Allow the engine to run for 30 minutes. CHECK the engine coolant temperature gauge
Feel the lower radiator hose. operation. REFER to Section 413-01 .
 Is the lower radiator hose hot?
No
GO to B13 .
B13 VISUALLY INSPECT THE
THERMOSTAT
 Carry out Thermostat Visual Yes
Inspection in the Component Tests INSTALL a new thermostat. TEST the system for
portion of this section. normal operation.
 Is the thermostat damaged?
No
INSTALL a new thermostat. TEST the system for
normal operation. If the engine still overheats,
INSTALL a new radiator. TEST the system for normal
operation.

Pinpoint Test C: The Engine Does Not Reach Normal Operating Temperature

Normal Operation

The engine cooling system functions to maintain engine temperatures during operation. Proper coolant flow
through the engine, radiator and remainder of cooling system passages and components is essential to
maintaining a proper engine temperature.

Engine coolant flows primarily from the engine to the radiator circuit and back to the coolant pump. From the
coolant pump, coolant is sent through the engine block and cylinder heads. A separate circuit from the
engine also feeds the heater core with coolant. The coolant pump is operated by engine rotation through a
pulley which is driven by a drive belt to circulate the coolant. The coolant thermostat is a control valve
actuated by coolant temperature. When the thermostat is closed, coolant flow bypasses the radiator circuit
and returns to the coolant pump. When the thermostat is opened, coolant is allowed to flow through the
radiator circuit in order to transfer engine generated heat to the outside air.

Concerns of engine inability to reach normal operating temperature typically occur when the rate of coolant
flow through some coolant circuits (radiator, heater core) is more than expected given the conditions, or
when the cooling fans operate all the time. Heat is not allowed to build in the engine because a heat
exchanger is removing too much heat, including the radiator, heater core and oil cooler. In addition,
perceived concerns that the engine does not reach normal operating temperature can be related to a low
coolant level or trapped air which does not allow for hot coolant to be available at the heater core, an
inoperative climate control system, or for concerns perceived or related to an incorrect engine temperature
gauge indication.

For vehicle/engine specific information, refer to Engine Cooling in the Description and Operation portion of
this section.

 DTC P0125 Insufficient Coolant Temperature For Closed Loop Fuel Control
 DTC P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

This pinpoint test is intended to diagnose the following:

 Low coolant level
 Thermostat
 Engine Coolant Temperature (ECT) indicator system (gauge)
  Engine cooling fan

PINPOINT TEST C: THE ENGINE DOES NOT REACH NORMAL OPERATING TEMPERATURE

WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew
the coolant pressure relief cap when the engine is operating or the cooling system is hot. The
cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is
loosened slightly. Failure to follow these instructions may result in serious personal injury.

Test Step Result / Action to Take

C1 CARRY OUT INSPECTION
AND VERIFICATION
 Carry out the Inspection and Yes
Verification procedure in this REPAIR as needed. TEST the system for normal operation.
section.
 Were any concerns No
found? GO to C2 .
C2 CHECK FOR DTC P0125 or
P0128

NOTE: Refer to the Yes

Powertrain GO to C3 .
Control/Emissions Diagnosis
(PC/ED) manual for correct No
scan tool hook-up The cooling system is operational. If an inoperative engine
procedure. coolant temperature gauge is suspected, CHECK the engine
coolant temperature gauge operation. REFER to Section 413-
 Check for DTCs P0125 or 01 . If an inoperative climate control system is suspected,
P0128. CHECK the climate control system operation. Refer to the
 Is DTC P0125 or P0128 appropriate section in Group 412 for the procedure. If any other
present? DTCs are retrieved, REFER to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual.
C3 CHECK THE ELECTRIC
COOLING FAN OPERATION
 Allow the engine to cool. Yes
 Make sure the A/C switch is DIAGNOSE the electric cooling fan operation. REFER to the
OFF. Powertrain Control/Emissions Diagnosis (PC/ED) manual.
 Start the engine.
 Check the electric cooling No
fan. GO to C4 .
 Is the electric cooling fan
on all the time?
C4 CHECK THE COOLANT
LEVEL
 NOTE: Allow the engine to Yes
cool before checking the INSTALL a new thermostat. TEST the system for normal
coolant level. operation.
 Visually check the engine
coolant level in the degas No
bottle. GO to Pinpoint Test A to diagnose a coolant leak.
 Is the engine coolant level
within specification?
Component Tests

Cooling System Pressure Test

WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew
the coolant pressure relief cap when the engine is operating or the cooling system is hot. The
cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is
loosened slightly. Failure to follow these instructions may result in serious personal injury.

NOTE: Vehicles have the pressure relief cap on the degas bottle and no radiator cap.

1. Turn the engine OFF.

2. Check the engine coolant level. Adjust the coolant level as necessary.

3. Attach the Radiator/Heater Core Pressure Tester to the degas bottle nipple and overflow hose. Install
a pressure test pump to the quick connect fitting of the test adapter.

4. NOTICE: Do not pressurize the cooling system beyond the maximum pressure listed in the
specifications table in this section, or cooling system components can be damaged.
 NOTE: If the plunger of the pressure tester is depressed too fast, an erroneous pressure reading will
result.

Slowly depress the plunger of the pressure test pump until the pressure gauge reading stops
increasing and note the highest pressure reading obtained. If the pressure reading exceeds the
maximum cap pressure listed in the specifications table, install a new pressure relief cap.

5. If the system does not hold pressure, remove the pressure relief cap and wash in clean water to
dislodge all the foreign material from the gasket. Check the sealing surface in the filler neck of the
degas bottle for nicks or cuts. Install the pressure relief cap.

6. Pressurize the engine cooling system as described in Step 4 above. Observe the gauge reading for
approximately 2 minutes. Pressure should not drop during this time. If the pressure drops within this
time, inspect for leaks and repair as necessary.

7. If no leaks are found and the pressure drops. the pressure relief cap may be leaking. Install a new
pressure relief cap and retest the system.

8. If no leaks are found after a new pressure relief cap is installed, and the pressure drops, the leak may
be internal to the engine. Inspect the coolant for engine oil and the engine oil for coolant. Refer to
Section 303-00 to diagnose the engine.

9. Release the system pressure by loosening the pressure relief cap. Check the coolant level and adjust
as necessary.

Thermostat

A new thermostat should be installed only after the following tests and checks have been carried out:

 Pinpoint Test A, B or C
 Thermostat Visual Inspection

Thermostat Visual Inspection

1. Remove the thermostat.

2. Examine the thermostat for signs of damage including:

 Valve not fully seated (light visible through the valve)
 Foreign material lodged in the main valve
 Bent or broken frame or flange
 Bent or broken spring
 Bent or broken valve or valve stem
 Wax leaking from wax reservoir or a bulge in the reservoir
 Any other damage or distortion

3. NOTE: If no damage is found during the inspection, do not attempt to open the thermostat using hot
water or other heat sources. This method is not an accurate means to test the function of the
thermostat and may damage the thermostat.

If damage is found during the inspection, remove any foreign material or broken pieces and install a
new thermostat.
 4. If no damage is found during the inspection, continue troubleshooting the system concern. Go to the
Symptom Chart for further instructions.

Radiator Leak Test, Removed From Vehicle

NOTICE: Never leak test an aluminum radiator in the same water that copper/brass radiators are
tested in. Flux and caustic cleaners may be present in the cleaning tank and they will damage
aluminum radiators.

NOTE: Clean the radiator before leak testing to avoid contamination of tank.

1. Leak test the radiator in clean water with pressurized air to the maximum pressure listed in the
Specifications.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
GENERAL PROCEDURES Procedure revision date: 06/10/2009

Cooling System Draining, Filling and Bleeding

Special Tool(s)
RADIATOR REFILLER
078-00592

Material
Item Specification
Cooling System Stop Leak Pellets WSS-M99B37-
VC-6 B6
Motorcraft Premium Gold Engine WSS-M97B51-
Coolant with Bittering Agent (US A1
only)
VC-7-B (US); CVC-7-A (Canada);
or equivalent (yellow color)

Draining

WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew
the coolant pressure relief cap when the engine is operating or the cooling system is hot. The
cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is
loosened slightly. Failure to follow these instructions may result in serious personal injury.

NOTICE: The coolant must be recovered in a suitable, clean container for reuse. If the coolant is
contaminated, it must be recycled or disposed of correctly. Using contaminated coolant may result
in damage to the engine or cooling system components.

NOTICE: The engine cooling system is filled with Motorcraft Premium Gold Engine Coolant. Mixing
coolant types degrades the corrosion protection of Motorcraft Premium Gold Engine Coolant.

NOTE: The addition of Cooling System Stop Leak Pellets or equivalent meeting Ford specification WSS-
M99B37-B6 darkens Motorcraft Premium Gold Engine Coolant from yellow to golden tan.

NOTE: Less than 80% of coolant capacity can be recovered with the engine in the vehicle. Dirty, rusty or
contaminated coolant requires replacement.

1. Release the pressure in the cooling system by slowly turning the pressure relief cap one half turn
counterclockwise. When the pressure is released, remove the pressure relief cap.

2. Remove the splash shields.

 3. Place a suitable container below the radiator draincock.
 Open the draincock and allow to drain.
 Close the draincock after draining.

4. When the coolant is drained, make sure drain plugs are installed and tight.

5. Install the splash shields.

Filling and Bleeding with RADIATOR REFILLER

1. Install the RADIATOR REFILLER and follow the manufacturer's instructions to fill and bleed the
cooling system.
 Recommended coolant concentration is 50/50 ethylene glycol to distilled water.
 Maximum coolant concentration is 60/40 for cold weather areas.
 Minimum coolant concentration is 40/60 for warm weather areas.
Filling and Bleeding without RADIATOR REFILLER

NOTICE: Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion
protection to the engine and cooling components. In order to obtain these protections, the engine
coolant must be maintained at the correct concentration and fluid level in the degas bottle.

To maintain the integrity of the coolant and the cooling system:

 Vehicle cooling systems are filled with Motorcraft Premium Gold Engine Coolant. Always fill
the cooling system with the same coolant that is present in the system. Do not mix coolant
types.
 Do not add/mix orange-colored Motorcraft Specialty Orange Engine Coolant or equivalent
meeting Ford specification WSS-M97B44-D or green colored Motorcraft Premium Engine
Coolant. Mixing coolants may degrade the coolant's corrosion protection.
 Do not add alcohol, methanol, brine or any engine coolants mixed with alcohol or methanol
antifreeze. These can cause engine damage from overheating or freezing.
 Ford Motor Company does NOT recommend the use of recycled engine coolant in vehicles
originally equipped with Motorcraft Premium Gold Engine Coolant since a Ford-approved
recycling process is not yet available.
 Used engine coolant should be disposed of in an appropriate manner. Follow your
community's regulations and standards for recycling and disposing of automotive fluids.

NOTE: The addition of Cooling System Stop Leak Pellets or equivalent meeting Ford specification WSS-
M99B37-B6 darkens Motorcraft Premium Gold Engine Coolant from yellow to golden tan.

2.3L

1. Open the degas bottle cap and the bleed valve on the back of the engine water outlet.
 2. NOTE: Make sure the coolant flows from the radiator through the upper radiator hose and fills the
engine. When full, coolant should flow from the bleed hole.

Fill the degas bottle to the MAX fill line.

 Recommended coolant concentration is 50/50 ethylene glycol to distilled water.
 Maximum coolant concentration is 60/40 for cold weather areas.
 Minimum coolant concentration is 40/60 for warm weather areas.

3. Close the degas bottle cap and the bleed valve.

4. NOTICE: If the engine overheats or the fluid level drops below the minimum fill line, shut off
the engine and add fluid to the degas bottle maximum fill line once the engine cools. Failure to
follow these instructions may result in damage to the engine.

Start the engine and let it idle for 30 minutes or until the engine reaches normal operating
temperature.

5. Allow the engine to cool and repeat Step 2 if necessary.

6. Start the engine and turn the heater to the MAX position.

7. NOTICE: If the engine overheats or the fluid level drops below the minimum fill line, shut off
the engine and add fluid to the degas bottle maximum fill line once the engine cools. Failure to
follow these instructions may result in damage to the engine.

Run the engine at 2,500 rpm for 10 minutes.

8. Repeat Step 7 if necessary.

9. WARNING: Always allow the engine to cool before opening the cooling system. Do not
unscrew the coolant pressure relief cap when the engine is operating or the cooling system is
hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when
the cap is loosened slightly. Failure to follow these instructions may result in serious personal
injury.

Check the engine coolant level in the degas bottle and fill as necessary.

3.0L
10. Add the correct engine coolant mixture to the degas bottle until the coolant level is between the
COOLANT FILL LEVEL marks.
 Recommended coolant concentration is 50/50 ethylene glycol to distilled water.
 Maximum coolant concentration is 60/40 for cold weather areas.
 Minimum coolant concentration is 40/60 for warm weather areas.

11. Select the maximum heater temperature and blower motor speed settings. Position the control to
discharge air at vents in the instrument panel.

12. Start the engine and allow to idle. While engine is idling, feel for hot air at vents.

13. NOTICE: If air discharge remains cool and engine coolant temperature gauge does not move,
engine coolant level is low in engine and must be filled. Stop engine, allow to cool and fill
cooling system. Failure to follow these instructions may result in damage to the engine.

Start the engine and allow to idle until normal operating temperature is reached. Hot air should
discharge from vents. The engine coolant temperature gauge should maintain a stabilized reading in
the middle of the NORMAL range and the upper radiator hose should feel hot to the touch.

14. Shut the engine OFF and allow to cool.

15. Check the engine for coolant leaks.

16. Check the engine coolant level in degas bottle and fill as necessary.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
GENERAL PROCEDURES Procedure revision date: 04/11/2008

Cooling System Flushing

Material
Item Specification
Motorcraft Premium Gold Engine WSS-M97B51-
Coolant with Bittering Agent (US A1
only)
VC-7-B (US); CVC-7-A (Canada);
or equivalent (yellow color)
Cooling System Flush ESR-M14P7-A
VC-1

1. To remove rust, sludge and other foreign material from the cooling system, use cooling system flush
that is safe for use with aluminum radiators. For additional information, refer to Specifications. This
cleaning restores cooling system efficiency and helps prevent overheating. A pulsating or reversed
direction of flushing water will loosen sediment more quickly than a steady flow in the normal coolant
flow direction. In severe cases where cleaning solvents will not clean the cooling system efficiently, it
will be necessary to use the pressure flushing method using cooling system flusher. Dispose of old
coolant and flushing water contaminated with antifreeze and cleaning chemicals in accordance with
local, state or federal laws.

2. Remove the radiator. For additional information, refer to Radiator — 2.3L or Radiator — 3.0L (4V) in
this section.

3. NOTICE: Radiator internal pressure must not exceed 138 kPa (20 psi). Damage to the radiator
can result.

Backflush the radiator with the radiator in an upside-down position with a high-pressure hose in the
lower hose location and backflush.

4. NOTE: On 2.3L engines the thermostat and housing are serviced as an assembly.

Remove the thermostat. For additional information, refer to Thermostat Housing — 2.3L or
Thermostat — 3.0L (4V) in this section.

5. Backflush the engine. Position the high-pressure water hose into the engine through the engine return
and backflush the engine.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 05/15/2009

Block Heater

4-Cylinder Engine

Item Part Number Description

1 14A199 Block heater electrical connector
2 6A051 Block heater

V6 Engine
 Item Part Number Description
1 14A199 Block heater electrical connector
2 6A051 Block heater

Removal and Installation

All engines

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-
02 .

2. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and
Bleeding in this section.

3. NOTICE: Make sure that the block heater wiring is routed and secured away from rotating or
hot components, or damage to the wiring can occur.

Disconnect the block heater electrical connector.

4-cylinder engine

4. Remove the block heater.

 To install, tighten to 40 Nm (30 lb-ft).

V6 engine
 5. Remove the block heater.
 To install, tighten to 25 Nm (18 lb-ft).

All engines

6. To install, reverse the removal procedure.

7. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling
and Bleeding in this section.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 01/10/2007

Thermostat Housing — 2.3L

NOTE: The thermostat and thermostat housing are serviced as an assembly.

Item Part Number Description

1 W527362 Heater hose clamp
2 18C553 Heater hose
3 W527372 Radiator hose clamp
4 8B273 Radiator hose
5 W500015 Thermostat housing bolt (3 required)
6 8575 Thermostat housing
7 8K530 Gasket

Removal and Installation

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02 .

2. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and
Bleeding in this section.

3. Remove the accessory drive belt. For additional information, refer to Section 303-05A .
4. Disconnect the heater hose at the thermostat housing.

5. Disconnect the lower radiator hose at the thermostat housing.

6. Remove the 3 bolts, thermostat housing and gasket.

 To install, tighten to 10 Nm (89 lb-in).

7. To install, reverse the removal procedure.

 Clean and inspect the gasket, install a new gasket if necessary.

8. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling
and Bleeding in this section.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 01/10/2007

Thermostat — 3.0L (4V)

Material
Item Specification
Motorcraft Premium Gold Engine WSS-M97B51-
Coolant with Bittering Agent (US A1
only)
VC-7-B (US); CVC-7-A (Canada); or
equivalent (yellow color)

Item Part Number Description

1 W527375 Radiator hose clamp
2 8B273 Lower radiator hose
3 W500015 Thermostat housing cover bolt (3 required)
4 8K528 Thermostat housing cover
5 N806807 O-ring seal
6 8575 Thermostat

Removal and Installation

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02 .

2. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and
Bleeding .

3. Remove the air cleaner outlet pipe. For additional information, refer to Section 303-12B .

4. Disconnect the lower radiator hose from the thermostat housing.

5. NOTE: To install, lubricate the thermostat housing O-ring seal with clean engine coolant.

Remove the 3 bolts, thermostat housing cover, O-ring seal and thermostat.
 To install, tighten to 10 Nm (89 lb-in).

6. To install, reverse the removal procedure.

 Clean and inspect the O-ring seal. Install a new seal if necessary.

7. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling
and Bleeding in this section.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 01/10/2007

Thermostat Housing — 3.0L (4V)

Item Part Number Description

1 W527371 Radiator hose clamp
2 8B274 Upper radiator hose
3 W527375 Radiator hose clamp
4 8B273 Lower radiator hose
5 W527212 Heater hose clamp
6 18K579 Heater hose
7 8287 Clamp
8 8287 Clamp
9 8A586 Thermostat housing

Removal and Installation

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02 .

2. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and
Bleeding in this section.
3. Remove the air cleaner outlet pipe. For additional information, refer to Section 303-12B .

4. Disconnect the upper radiator hose from the thermostat housing.

5. Disconnect the lower radiator hose from the thermostat housing.

6. Disconnect the heater hose from the thermostat housing.

7. Reposition the 2 thermostat housing-to-engine clamps.

 Remove the thermostat housing.

8. To install, reverse the removal procedure.

9. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling
and Bleeding in this section.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 01/10/2007

Bypass Tube — 2.3L

Item Part Number Description

1 W525958 Hose clamps (2 required)
2 8548 Bypass tube

Removal and Installation

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02 .

2. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and
Bleeding in this section.

3. Remove the intake manifold. For additional information, refer to Section 303-01A .

4. Disconnect and remove the coolant bypass tube.

5. To install, reverse the removal procedure.

6. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling
and Bleeding in this section.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 01/10/2007

Bypass Tube — 3.0L (4V)

Material
Item Specification
Motorcraft Premium Gold Engine WSS-M97B51-
Coolant with Bittering Agent (US A1
only)
VC-7-B (US); CVC-7-A (Canada); or
equivalent (yellow color)

Part
Item Number Description
1 8287 Hose clamp
2 8A520 Bypass tube-to-thermostat housing hose
3 14A464 Engine coolant temperature (ECT) sensor electrical
connector
4 W708059 Stud bolt
5 W708060 Bolt
6 8548 O-ring seal
7 391552 O-ring seal
8 8548 Bypass tube

Removal and Installation

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02 .

2. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and
Bleeding in this section.

3. Remove the thermostat housing. For additional information, refer to Thermostat Housing — 3.0L (4V) in
this section.

4. Remove the bypass tube-to-thermostat housing hose.

5. Disconnect the engine coolant temperature (ECT) sensor electrical connector.

6. Remove the bolt, stud bolt and bypass tube.

 To install, tighten to 10 Nm (89 lb-in).

7. Remove and inspect the O-ring seals, install new seals if necessary.

8. To install, reverse the removal procedure.

 Lubricate the O-ring seals with clean engine coolant.

9. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling
and Bleeding in this section.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 01/10/2007

Coolant Pump — 2.3L

Material
Item Specification
Motorcraft Premium Gold Engine WSS-M97B51-
Coolant with Bittering Agent (US A1
only)
VC-7-B (US); CVC-7-A (Canada); or
equivalent (yellow color)

Item Part Number Description

1 W500221 Coolant pump pulley bolt (3 required)
2 8509 Coolant pump pulley
3 W500015 Coolant pump bolt (3 required)
4 8501 Coolant pump
5 8507 Coolant pump O-ring seal

Removal and Installation

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02 .
2. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and
Bleeding in this section.

3. Remove the accessory drive belt. For additional information, refer to Section 303-05A .

4. Remove the 3 bolts and the coolant pump pulley.

 To install, tighten to 20 Nm (15 lb-ft).

5. Remove the 3 bolts and the coolant pump.

 Remove and discard the O-ring seal.
 To install, tighten to 10 Nm (89 lb-in).

6. To install, reverse the removal procedure.

 Lubricate the new O-ring seal with clean engine coolant.

7. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling
and Bleeding in this section.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 07/10/2007

Coolant Pump — 3.0L (4V)

Special Tool(s)
Installer, Camshaft Pulley
303-458 (T94P-6312-AH3), part of
303-S455

Installer, Power Steering Pump

Pulley (Nut only)
211-185 (T91P-3A733-A)

Plate, Water Pump Pulley

303-456 (T94P-6312-AH1), part of
303-S455

Protector, Water Pump Shaft

303-457 (T94P-6312-AH2), part of
303-S455

Remover, Crankshaft Vibration

Damper
303-009 (T58P-6316-D)

Spacer, Water Pump Pulley

303-459 (T94P-6312-AH4), part of
303-S455
Item Part Number Description
1 W525958 Heater hose clamp
2 6N734 Heater hose
3 W701544 Coolant pump assembly bolt (3 required)
4 8287 Coolant pump-to-engine hose clamp
5 8A577 Coolant pump-to-engine hose
6 8287 Coolant pump-to-thermostat housing hose clamp
7 8501 Coolant pump assembly
8 6A359 Coolant pump drive pulley

Removal
1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02 .

2. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and
Bleeding in this section.

3. Disconnect the crankcase vent tube and position it aside.

4. Remove the coolant pump belt. For additional information, refer to Section 303-05B .

5. CAUTION: Failure to use the correct special tools, assembled as shown in the illustration,
will result in damage to the coolant pump pulley and/or special tools.

Using the special tools, remove the coolant pump pulley.

 6. Disconnect the heater hose from the coolant pump.

7. Disconnect the coolant pump-to-engine hose and position aside.

8. Remove the 3 bolts from the coolant pump assembly.

9. Reposition the coolant pump-to-thermostat housing hose clamp and remove the coolant pump and hose
as an assembly.

Installation

1. Connect the coolant pump-to-thermostat housing hose and reposition the clamp.
2. Position the coolant pump assembly and install the 3 bolts.
 Tighten to 10 Nm (89 lb-in).
 Tighten the 3 bolts an additional 90 degrees.

3. Connect the coolant pump-to-engine hose and the heater hose.

4. CAUTION: Failure to use the correct special tools, assembled as shown in the illustration,
will result in damage to the coolant pump pulley and/or special tools.

Install the special tool on the camshaft as shown in the illustration.

 Adjust the collar on the special tool screw to get the best thread engagement in the rear of the
camshaft.

5. CAUTION: Failure to use the correct special tools, assembled as shown in the illustration,
will result in damage to the coolant pump pulley and/or special tools.

NOTE: Only the roller collared nut from the Power Steering Pump Pulley Installer (211-185) is used on
Camshaft Pulley Installer (303-458).

Position the coolant pump pulley over the previously installed special tool and on the end of the
camshaft. Install the special tools as shown in the illustration.
 Using the special tools, install the coolant pump pulley flush with the end of the camshaft.

6. Install the coolant pump belt. For additional information, refer to Section 303-05B .
7. Connect the crankcase vent tube.

8. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling
and Bleeding in this section.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 01/10/2007

Cooling Fan Motor and Shroud

Item Part Number Description

1 W707399 Radiator bracket bolt (4 required)
2 8B068/8B445 Radiator bracket (2 required)
3 W503924 Cooling fan bolt (2 required)
4 14A464 Cooling fan electrical connector (2 required)
5 8600 Cooling fan motor and shroud
6 16B613 Center support
7 — Center support lower bolt
8 W520720 Center support nut
9 — Front grille bolt (2 required)
10 — Pin-type retainer (2 required)
11 8W005 Coolant recovery hose (2.3L only)
12 14A464 Cooling fan resistor electrical connector (2.3L only)
13 W707137 Hood latch nut
14 W707398 Hood latch bolt (2 required)
15 16700 Hood latch
16 14A163 Wiring harness retainers (2 required)

Removal and Installation

All vehicles

1. With vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02 .

2.3L vehicles only

2. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and
Bleeding in this section.

All vehicles

3. Remove the front bumper cover. For additional information, refer to Section 501-19 .

4. Remove the front impact severity sensor. For additional information, refer to Section 501-20B .

5. Remove the 2 pin-type retainers.

6. Remove the 4 bolts and the 2 radiator brackets.

 To install, tighten to 10 Nm (89 lb-in).

7. NOTE: Mark the hood latch position prior to removal of the bolts.

Loosen the nut, remove the 2 bolts and position aside the hood latch.
 To install, tighten to 9 Nm (80 lb-in).
 8. Remove the 2 wiring harness retainers from the front bumper bracket.

9. Remove the center support bolt.

 To install, tighten to 10 Nm (89 lb-in).

2.3L vehicles only

10. Disconnect the cooling fan resistor electrical connector.

11. Disconnect the coolant recovery hose from the radiator and position it aside.

3.0L vehicles only

12. Detach the lower degas bottle hose from the cooling fan motor and shroud.

All vehicles

13. Disconnect the cooling fan electrical connectors.

14. Remove the 2 cooling fan bolts and the cooling fan motor and shroud.
 To install, tighten to 8 Nm (71 lb-in).

15. To install, reverse the removal procedure.

2.3L vehicles only

16. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling
and Bleeding in this section.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 01/10/2007

Radiator — 2.3L

Item Part Number Description

1 W527372 Clamp
2 8B274 Upper radiator hose
3 W525853 Clamp
4 8C633 Degas bottle-to-radiator hose
5 W527372 Clamp
6 8B273 Lower radiator hose
7 8005 Radiator
 Item Part Number Description
8 N606676 A/C condenser-to-radiator bolt (2 required)
9 19710 A/C condenser

Removal and Installation

1. With vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02 .

2. Remove the cooling fan motor and shroud. For additional information, refer to Cooling Fan Motor and
Shroud in this section.

3. Disconnect the upper radiator hose from the radiator.

4. Disconnect the lower degas bottle-to-radiator hose from the radiator.

5. Disconnect the lower radiator hose from the radiator.

6. Remove the 2 A/C condenser-to-radiator bolts and position aside the A/C condenser from the radiator.
 To install, tighten to 8 Nm (71 lb-in).

7. Remove the radiator.

8. To install, reverse the removal procedure.

SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 01/10/2007

Radiator — 3.0L (4V)

Radiator Hoses

Item Part Number Description

1 W525961 Radiator-to-degas bottle hose clamp
2 8W005 Radiator-to-degas bottle hose
3 W527371 Upper radiator hose clamp
4 8B274 Upper radiator hose
5 W525953 Degas bottle-to-radiator hose clamp
6 8C633 Degas bottle-to-radiator hose
7 W527375 Lower radiator hose clamp
8 8B273 Lower radiator hose
9 8005 Radiator

Radiator
 Item Part Number Description
10 N606676 A/C condenser-to-radiator bolt (2 required)
11 19710 A/C condenser

Removal and Installation

1. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and
Bleeding in this section.

2. Remove the cooling fan motor and shroud. For additional information, refer to Cooling Fan Motor and
Shroud in this section.

3. Disconnect the radiator-to-degas bottle hose and upper radiator hose from the radiator.

4. Disconnect the degas bottle-to-radiator hose from the radiator.

5. Disconnect the lower radiator hose from the radiator.

6. Remove the 2 A/C condenser-to-radiator bolts and position aside the A/C condenser from the radiator.
 To install, tighten to 8 Nm (71 lb-in).

7. Remove the radiator.

8. To install, reverse the removal procedure.

9. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling
and Bleeding in this section.
SECTION 303-03A: Engine Cooling 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
REMOVAL AND INSTALLATION Procedure revision date: 03/07/2007

Degas Bottle

Item Part Number Description

1 W525961 Radiator-to-degas bottle hose clamp
2 8W005 Radiator-to-degas bottle hose
3 W707142 Degas bottle-to-fender nut
4 W707142 Degas bottle-to-fender nut
5 W525953 Degas bottle-to-radiator hose clamp
6 8C633 Degas bottle-to-radiator hose
7 8A080 Degas bottle
8 8100 Pressure relief cap

Removal and Installation

1. WARNING: Always allow the engine to cool before opening the cooling system. Do not
unscrew the coolant pressure relief cap when the engine is operating or the cooling system is
hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when
the cap is loosened slightly. Failure to follow these instructions may result in serious personal
injury.
 Release the pressure in the cooling system by slowly turning the pressure relief cap one-half turn
counterclockwise. When the pressure is released, remove the pressure relief cap.

2. Using hose clamp pliers, clamp the degas bottle-to-radiator hose.

3. Using a suitable suction device, siphon the coolant from the degas bottle.

4. Disconnect the radiator-to-degas bottle hose from the degas bottle.

5. Remove the 2 degas bottle nuts.

 To install, tighten to 6 Nm (53 lb-in).

6. Lift the degas bottle up and disconnect the degas bottle-to-radiator hose.
 Remove the degas bottle.

7. To install, reverse the removal procedure.

8. Fill the degas bottle. Refer to Cooling System Draining, Filling and Bleeding for the recommended
coolant mixture and fill level.