STANDARD PROCEDURE - MEASURING TIMING CHAIN WEAR
1.
Position a scale next to timing chain so that any movement of chain may be measured.
2.
Position a torque wrench 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.).