Timing Chain: Testing and Inspection

Measuring Timing Chain Wear






• This procedure must be performed with the timing chain cover removed. Refer to => [ Valve Timing Covers ] Service and Repair.

- Position a scale next to the timing chain so that any movement of the chain may be measured.

- Position a torque wrench (1) and socket on the camshaft sprocket bolt. Apply force in the direction of crankshaft rotation to take up slack to the following torque:

• 41 Nm (30 ft lbs) with cylinder heads installed.

• 20 Nm (15 ft lbs) with cylinder heads removed.

• With torque applied to the camshaft sprocket bolt, the crankshaft should not be permitted to move. It may be necessary to block the crankshaft to prevent rotation.

- Holding a measuring scale along the edge of the chain links.

- Apply force in the reverse direction to the following torque:

• 41 Nm (30 ft lbs) with cylinder heads installed.

• 20 Nm (15 ft lbs) with cylinder heads removed.

- Measure the amount of sprocket/chain movement.

- Install the a new timing chain and sprockets if movement exceeds 3.175 mm (1/8 in).