On-Vehicle Service; Rocker Arm Cover Replacement - GMC G Service Manual

ROCKER ARM COVER
REPLACEMENT
REMOVAL — RIGHT SIDE
R Remove or Disconnect (Figure 3)
1. Negative battery cable.
2. Engine cover.
3. Air cleaner and heat stove tube.
4. Diverter valve, bracket and hoses.
5. Spark plug wire bracket at the side of the cylinder
head.
6. Spark plug wires and clip at the rear of the cylinder
head.
7. Wiring harnesses at the rocker arm cover; move out
of the way.
8. Rocker arm cover bolts.
9. Rocker arm cover and gasket.
REMOVAL — LEFT SIDE
M Remove or Disconnect (Figure 3)
1. Negative battery cable.
Figure 3 — Rocker Arm Cover

ON-VEHICLE SERVICE

4.3 LITER V6 6A3-5
2. Engine cover.
3. Oil fill tube.
4. AIR pipe and check valve.
5. Generator rear bracket.
6. Crankcase ventilation pipe at the rocker arm cover.
7. Rocker arm cover bolts.
8. Rocker arm cover and gasket.
CLEANING AND INSPECTION
B!H Clean
• All traces of old gasket from the rocker arm cover and
cylinder head.
i m Inspect
• Rocker arm cover sealing surface for distortion and
damage. Replace if necessary.
INSTALLATION — RIGHT SIDE
M Install or Connect (Figure 3)
1. Rocker arm cover and gasket.
2. Rocker arm cover bolts and washers.
H il Tighten
• Rocker arm cover bolts to 10.2 N*m (90 in. lbs.).
3. Wiring harness to the rocker cover.
4. Spark plug wires, clips and brackets.
5. Diverter valve, hoses and bracket.
6. Air cleaner and heat stove tube.
7. Engine cover.
8. Negative battery cable.
INSTALLATION — LEFT SIDE
E Install or Connect (Figure 3)
1. Rocker arm cover and gasket.
2. Rocker arm cover bolts and washers.
H O Tighten
• Rocker arm cover bolts to 10.2 N*m (90 in. lbs.).
3. Crankcase ventilation pipe.
4. Generator rear bracket.
5. AIR pipe and check valve.
6. Oil fill tube.
7. Engine cover.
8. Negative battery cable.