Scribd
Upload
54 views3 pages

Driving

The radiator cools the engine via heat transfer from the coolant to small aluminum tubes with cooling fins. The radiator cap acts as a pressure release valve to regulate coolant levels. Most radiators are made from aluminum and plastic. To inspect an electric cooling fan, spin the fan blade while the engine is off. If the fan doesn't spin, it has failed. With the engine on and AC on, the fan should activate within 3 minutes; if not, check the fan fuse and wiring. The engine cooling fan moves air through the radiator at low speeds to cool the coolant. Powered fans are engine-driven via a temperature controlled clutch or electric. A failed fan causes overheating

Uploaded by

jejemon123
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
54 views3 pages

Driving

The radiator cools the engine via heat transfer from the coolant to small aluminum tubes with cooling fins. The radiator cap acts as a pressure release valve to regulate coolant levels. Most radiators are made from aluminum and plastic. To inspect an electric cooling fan, spin the fan blade while the engine is off. If the fan doesn't spin, it has failed. With the engine on and AC on, the fan should activate within 3 minutes; if not, check the fan fuse and wiring. The engine cooling fan moves air through the radiator at low speeds to cool the coolant. Powered fans are engine-driven via a temperature controlled clutch or electric. A failed fan causes overheating

Uploaded by

jejemon123
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 3

Radiator Cooling Fan

The radiator in your car is where the actual cooling of the engine occurs via heat transfer. Engine coolant is forced through the
radiator where it is run through small aluminum tubes with cooling fins. These aluminum tubes direct the flow of coolant through
the radiator and act as the conductor by which the heat is dissipated. The amount of heat transferred from the coolant depends on
the surface area of the core. The radiator cap acts like a pressure release valve, as the pressure increases due to heat, the cap
allows the excess coolant to enter the reservoir. Then, when the engine has cooled the coolant will return to the radiator. Most
radiators are made of an aluminum core and plastic side tanks, but in older vehicles they may be an all-metal construction.

Engine Fan Clutch (fan blade not attached)

To inspect an electric motor cooling fan start with key off, engine off. Spin the fan blade; it should "freewheel" if the fan motor
does not spin it has failed and needs to be replaced. If the fan motor "freewheels" the electrical system that operates the fan needs
to be tested. Start the engine and turn the air conditioner to the coolest setting, if your car does not have an air conditioner skip
this step. Within three minutes of operating the cars air conditioner the cooling fan should activate, if not the fan motor fuse must
be checked first; if the fuse condition is ok the remainder of the electrical system must be checked. To further troubleshoot this
problem a wiring schematic is needed which is located in a car repair manual. Use the wiring schematic to trace the circuit
through the fuse and relay components, if everything tests ok the fan motor has failed and needs to be replaced..
Engine Thermostat

The engine-cooling fan in your car is designed to move air through the radiator when the vehicle is at slower speeds. This airflow
removes heat from the coolant created by the engine using the radiator as a conductor. Some radiator cooling fans are powered by
the engine (mechanical) or by electricity. When a cooling fan fails it causes the coolant to retain heat, forcing the engine to run
hot and eventually overheat. A cooling fan that is powered by the engine is engaged and disengaged from operation by a
temperature controlled fan clutch.

Water Pump (appearance will very)

The thermostat in your vehicle is what regulates how fast the engine warms up and at what operating temperature it will run.
Warming the engine up is very important due to the different expansion rates of all the internal parts (aluminum, steel, cast iron
and rubber seals). If an engine is running too cold, the tolerances within are not correct and damage may ensue. Just as important
is that the engine runs at the proper temperature. Today’s vehicles are designed to run anywhere between 200-220 degrees
Fahrenheit, it is the thermostats job to regulate the fluid flow through the radiator to keep the temperature at a predetermined
level. Most fuel injected vehicles use a 195-degree thermostat, so by 200 degrees it is fully open and letting the fluid flow
through the radiator and back to the engine.

You might also like