Firebird V8-305 5.0L (1982)
Timing Chain: Service and Repair
Fig. 18 Timing gear locating marks. V6 & V8 engines
V6 & V8 ENGINES
1.
Remove timing chain cover as outlined previously.
2.
Remove crankshaft oil slinger.
3.
Crank engine until timing marks on sprockets are in alignment, Fig. 18.
4.
Remove three camshaft-to-sprocket bolts.
5.
Remove camshaft sprocket and timing chain together. Sprocket is a light press fit on camshaft for approximately 1/8 inch. If sprocket does not
come off easily, a light blow with a plastic hammer on the lower edge of the sprocket should dislodge it.
6.
If crankshaft sprocket is to be replaced, remove it with a suitable gear puller. Install new sprocket, aligning key and keyway.
7.
Install chain on camshaft sprocket. Hold sprocket vertical with chain hanging below and shift around to align the timing marks on sprockets.
8.
Align dowel in camshaft with dowel hole in sprocket and install sprocket on camshaft. Do not attempt to drive sprocket on camshaft as welch plug
at rear of engine can be dislodged.
9.
Draw sprocket onto camshaft, using the three mounting bolts. Tighten to 20 ft. lb. torque.
10.
Lubricate timing chain and install cover.
