YD25 DUPLEX
TIMING CHAIN
CONVERSION KIT
The kit includes: ·
Duplex fuel pump sprocket
Duplex crankshaft sprocket (Australian made)
Duplex vacuum pump sprocket (Australian made by
YD25.com.au with local and international registered
designs and patents pending)
Duplex fuel pump drive chain (genuine Nissan Japan
or Iwis Germany)
Duplex camshaft drive chain (genuine Nissan)
Cam chain tensioner (genuine Nissan, plus an
Australian made fail-safe component)
Fuel pump chain tensioner (genuine Nissan)
Seven-quality chain guides
Fuel pump oil seal
Crankshaft oil seal
Oil pump o rings
Scissor gear tool (Australian made)
Step by step installation guide and free telephone or
email support
Five year, 100,000km chain and sprocket warranty
We are so confident in the quality of our chains and sprockets that we now offer a five-
year, 100,000km chain and sprocket warranty. This is five times the industry standard.
Evidence that the vehicle has been serviced according to Nissan guidelines will be required
to support a warranty claim. The warranty covers premature wear to chains and sprockets.
Damage as a result of incorrect installation by anyone apart from us, other parts failing
causing chain and sprocket damage or continuing to drive the vehicle when there is an
unusual noise coming from the motor rather than having it repaired will not be covered by
our warranty. All other timing chain components are covered by a 12mth 20,000kms
warranty.
Kiwi Cylinder Heads Ltd
Phone: 0800-549-429
Email: info@kch.co.nz
www.cylinderheads.co.nz
NISSAN'S YD25 SINGLE ROW
TIMING CHAIN FAILURES
D22 Navara D40 Navara R51 Pathfinder
YD25 engines are prone to single row
primary timing chain failures.
Nissan Navara D22 Nissan Navara D40 Nissan Pathfinder R51 YD25 original
primary timing chain sprockets showing wear and damage.
Nissan Navara D22 Nissan Navara D40 Nissan Pathfinder R51 YD25
original primary timing chain guides showing wear and damage. The worn
and broken plastic guide fragments block the oil pick up strainer.
Nissan Navara D22 Nissan Navara D40 Nissan Pathfinder R51 YD25
original single row primary timing chain showing wear and damage.
Damage to engine components following timing chain failure.
0800-549-429
