Measuring Timing Chain Stretch

1. Place a scale next to timing chain so that any movement of chain may be measured.
2. Place a torque wrench and socket on camshaft sprocket attaching bolt and apply torque in direction of crankshaft rotation to take up slack; 41 Nm (30 ft. lbs.) with cylinder head installed or 20 Nm (15 ft. lbs.) with cylinder heads removed. With a torque applied to the camshaft sprocket bolt, crankshaft should not be permitted to move. It may be necessary to block crankshaft to prevent rotation.





Fig. 34

3. Holding a scale even, with dimension reading as shown (Fig. 34), along edge of chain links. Apply torque in the reverse direction to 41 Nm (30 ft. lbs.) with cylinder heads installed, or 20 Nm (15 ft. lbs.) with cylinder heads removed. Check amount of chain movement.
4. Install a new timing chain, if its movement exceeds 3.175 mm (1/8 inch).
5. If chain is not satisfactory, refer to Timing Chain Removal and Installation.