Timing Chain: Service and Repair

TIMING CHAIN AND SPROCKETS

REMOVAL - TIMING CHAIN AND CAMSHAFT SPROCKET
1. Disconnect negative cable from battery.
2. Remove the timing chain cover.

Fig.146:

3. Rotate engine by turning crankshaft until the timing marks are aligned as shown in (Fig. 146).
4. Remove camshaft sprocket attaching bolt.
5. Remove the timing chain with camshaft sprocket.
6. Remove the crankshaft sprocket.

REMOVAL - CRANKSHAFT SPROCKET
1. Remove the timing chain.

Fig.147:

2. Using Special Tools 8539, 5048-6, and 5048-1, remove the crankshaft sprocket while holding the crankshaft from turning (Fig. 147). Be careful not to damage the crankshaft surfaces.

INSTALLATION - CRANKSHAFT SPROCKET
1. Position the sprocket on the crankshaft (timing mark out) with the timing slot aligned with the timing pin.

Fig.148:

2. Install sprocket using Special Tool 8452 (Fig. 148). Install sprocket until it is fully seats on the crankshaft.
3. Install the timing chain and camshaft sprocket.

INSTALLATION - TIMING CHAIN AND CAMSHAFT SPROCKET
1. Rotate crankshaft so the timing arrow is to the 12 o'clock position (Fig. 146).

NOTE: Lubricate timing chain and sprockets with clean engine oil before installation.

2. While holding camshaft sprocket and chain in hand, place timing chain around the sprocket, aligning the plated link with the dot on the sprocket. Position the timing arrow to the 6 o'clock position (Fig. 146).
3. Place timing chain around crankshaft sprocket with the plated link lined up with the dot on the sprocket. Install camshaft sprocket into position.
4. Use a straight edge to check alignment of timing marks.
5. Install camshaft sprocket bolt and washer. Tighten bolt to 54 Nm (40 ft. lbs.).
6. Rotate crankshaft 2 revolutions and check timing mark alignment (Fig. 146). If timing marks do not line up, remove camshaft sprocket and realign.
7. Install the timing chain cover.
8. Connect negative cable to battery.