Grand Caravan V6-3.8L (2009)
Timing Chain: Procedures
MEASURING TIMING CHAIN WEAR
NOTE: This procedure must be performed with the timing chain cover removed See: Timing Cover/Service and Repair/Engine Timing
Cover(s) - Removal.
1. Position a scale next to timing chain so that any movement of chain may be measured.
2. Position a torque wrench (1) and socket on the camshaft sprocket attaching bolt. Apply force in the direction of crankshaft rotation to take up slack
to the following torque:
-
41 Nm (30 ft. lb.) with cylinder heads installed
-
20 Nm (15 ft. lb.) with cylinder heads removed
NOTE: With torque applied to the camshaft sprocket bolt, crankshaft should not be permitted to move. It may be necessary to block
crankshaft to prevent rotation.
3. Holding a measuring scale along edge of chain links.
4. Apply force in the reverse direction to the following torque:
-
41 Nm (30 ft. lb.) with cylinder heads installed
-
20 Nm (15 ft. lb.) with cylinder heads removed
5. Measure amount of sprocket/chain movement.
6. Install a new timing chain and sprockets if movement exceeds 3.175 mm (1/8 in.).