Cylinder Head Removal; Torsional Damper Removal; Oil Pan Removal; Oil Pump Removal - GMC 1989 Light Duty Truck Repair Manual

CYLINDER HEAD REMOVAL

R em ove or D isconnect
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1. Spark plugs.
2. Cylinder head bolts.
3. Cylinder heads.
4. Head gaskets.

TORSIONAL DAMPER REMOVAL

|<--»| R em ove or D isconnect (Figure 5)
Tool Required:
J 23523-E , Torsional D am per P u lle r and
Installer
1. Torsional damper bolt.
2. Torsional damper using J 23523-E.
3. Crankshaft key (if necessary).

OIL PAN REMOVAL

Rem ove or D isconnect (Figure 6)
1. Oil pan bolts, nuts, and reinforcements.
2. Oil pan and gasket.

OIL PUMP REMOVAL

R em ove or D isconnect
1. Oil pump to main bearing cap bolt.
2. Oil pump.

FRONT COVER REMOVAL

R em ove or D isconnect
1. Front cover bolts and reinforcements.
2. Front cover.
3. Front cover to block gasket.
4.3 LITER V-6 6A3-7
70. Gasket
71. Reinforcement
Figure 6— Oil Pan Installation

CAMSHAFT REMOVAL

Rem ove or D isconnect (Figures 7 and 8)
1. Camshaft sprocket bolts.
2. Camshaft sprocket and timing chain. The sprocket
is a light interference fit on the camshaft. Tap the
sprocket on its lower edge to loosen it.
3. Screws (88) and thrust plate (87).
4. Camshaft.
• Install two or three 5/ie-18 inch bolts 100-125
mm (4-5 inch es) long into the c a m s h a ft
threaded holes. Use these bolts to handle the
camshaft (figure 8).
• Pull the camshaft from the block. Use care to
prevent damage to the camshaft bearings.
B-07884