Timing Chain Replacement

TIMING CHAIN AND SPROCKET REPLACEMENT









REMOVE OR DISCONNECT

NOTICE: If the timing chain, timing gears, front cover, crankshaft position sensor, crankshaft or other components affecting timing are replaced, it will be necessary to reprogram TDC Offset Into the PCM.

1. Front cover.

MEASURE:
- Timing chain free play as follows:
A. Mount a dial indicator to the front of the block.
B. Position the dial indicator so the plunger contacts the timing chain between the two gears.
C. Pull the chain outward (parallel to the front face of the block) the maximum amount with finger pressure on the inside of the chain.
D. Set the dial indicator to zero.
E. Move the chain inward (parallel to the front face of the block) the maximum amount with finger pressure on the outside of the chain.
F. Note the total indicator travel. With used parts, the deflection must not exceed 20.3 mm (0.8 inch). if the deflection exceeds this limit, the sprockets and timing chain must be inspected for wear and replaced as necessary. With new pans the maximum deflection must not exceed 12.7 mm (0.5 inch).

2. Fuel injection pump gear.
3. Camshaft gear.
- Align the timing marks.
4. Camshaft sprocket with timing chain.
5. Crankshaft sprocket.

INSTALL OR CONNECT
1. Crankshaft sprocket.
2. Camshaft sprocket with timing chain.

IMPORTANT:
- Align the timing marks.

3. Camshaft gear, bolt, and washer.

TIGHTEN
- Bolt to 100 Nm (75 lb. ft.).

4. Fuel injection pump gear and bolts.

IMPORTANT:
- Align the timing marks.

TIGHTEN
- Bolts to 23 Nm (17 lb. ft.).

5. Front cover.

ADJUST
- Fuel injection pump timing.