Durango 2WD V6-3.7L (2009)
Timing Chain: Procedures
Measuring Timing Chain Wear
MEASURING TIMING CHAIN WEAR
NOTE: This procedure must be performed with the timing chain cover removed.
1. Remove the timing chain cover. See: Removal and Replacement/Timing Chain & Sprockets - Removal.
2. To determine if the secondary timing chains are worn, rotate the engine clockwise until maximum tensioner piston extension is obtained. Measure
the distance between the secondary timing chain tensioner housing and the step ledge on the piston. The measurement at point (A) must be less
than 15 mm (0.5906 of an inch).
3. If the measurement exceeds the specification the secondary timing chains are worn and require replacement See: Removal and
Replacement/Timing Chain & Sprockets - Removal.
Timing Chain & Sprockets - Inspection
INSPECTION
Inspect the following components:
-
Sprockets for excessive tooth wear. Some tooth markings are normal and not a cause for sprocket replacement.
-
Idler sprocket assembly bushing and shaft for excessive wear.
-
Idler sprocket assembly spline joint. The joint should be tight with no backlash or axial movement.
-
Chain guides and tensioner arms. Replace these parts if grooving in plastic face is more than 1 mm (0.039 in.) deep. If plastic face is severely
grooved or melted, the tensioner lube jet may be clogged. The tensioner should be replaced.
-
Secondary chain tensioner piston and ratcheting device. Inspect for evidence of heavy contact between tensioner piston and tensioner arm. If this
condition exist the tensioner arm and chain should be replaced.
-
Primary chain tensioner plastic faces. Replace as required.
