Oil Pump Bolt; Oil Pump Replacement; Rear Crankshaft Oil Seal Replacement - GMC G Service Manual

A. Apply RTV Sealer to Shaded Area
74. Gasket
75. Reinforcement
76. Rear Oil Pan Seal
77. Timing Marker (Some Engines)
78. Front Oil Pan Seal
79. Clip (Number and Location Varies)
Figure 17 — Oil Pan

OIL PUMP REPLACEMENT

E Remove or Disconnect
1. Oil pan, as outlined previously.
2. Oil pump to main bearing cup bolts.
3. Oil pump.
IL» l
Inspect
• Oil pump pickup tube for damage and looseness. If
the tube is loose or damaged, replace it as outlined in
the proper unit repair manual.
Oil Pump Repair
• Refer to the proper unit repair manual.
M Install or Connect
1. Oil pump to the engine. Align the slot in the oil pump
shaft with the tang on the distributor shaft. The oil
pump should slide easily into place. No gasket is
used.
2. Oil pump to main bearing cap bolt.
• Oil pump bolt to 90 N»m (65 ft. lbs.).
3. Oil pan, as outlined previously.
REAR CRANKSHAFT OIL SEAL
The rear main bearing oil seal can be replaced (both
halves) without removal of the crankshaft. Always replace
the upper and lower seal as a unit. Install the seal with the
lip facing the front of the engine. Extreme care should be
exercised when installing this seal to protect the sealing
bead located in the channel on the outside diameter of the
seal. An installation tool should be used to protect the seal
bead when positioning the seal. (Some seal kits include the
tool as part of the service kit.)
H Remove or Disconnect (Figures 18 and 19)
1. Oil pan and oil pump, as outlined previously.
2. Rear main bearing cap.
3. Lower seal half (figure 18).
4. Upper seal half (figure 19).
• Tap on the upper seal half, using a small drift
• Remove the upper seal half, using pliers.
M Clean
• Sealing surfaces of the main bearing cap and block.
0 3 Inspect
F-02382
• Crankshaft, seal channel, and sealing surfaces for
nicks, scratches, etc.
Figure 18 — Removing the Lower Oil Seal Half
7.4 LITER V8 6A5-13
Tighten
REPLACEMENT
and hammer.