GMC 1990 Light Truck Repair Manual page 397

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71. Crankshaft Rear Oil Seal
72. Crankshaft Rear Bearing
86. Crankshaft Bearings
88. Crankshaft
124. Main Bearing Cap
125. Bolt
126. Rear Main Bearing Cap
Figure 39— Crankshaft and Bearing Com ponents
2.5 LITER L4 ENGINE 6A1-23
124
A. A lignm ent Hole in Crankshaft
B. Dust Lip
C. Dowel Pin
D. Collar
E. Mandrel
F. Screws
71. Crankshaft Rear Oil Seal
Figure 4 1 — Installing the Rear Crankshaft Oil Seal
bearing cap, foreign matter between the insert and
the block or the bearing cap, or a faulty insert could
cause a lack of clearance at the bearing.
CRANKSHAFT REAR OIL
F-01994
SEAL INSTALLATION
|-»<-| Install or Connect (Figures 5 and 41)
Tool Required:
J 34924-A Seal Installer
• Crankshaft rear oil seal using J 34924.
1. Lubricate the seal inside diameter with engine
oil.
2. Slide the seal over the mandrel of the tool,
until the dust lip (back of seal), mates squarely
against the collar.
3. Lubricate the seal outside diameter with
engine oil.
4. Position the tool with the seal in place against
the crankshaft. Align the dowel with the
alignment hole in the crankshaft. Tighten the
screws firmly.
5. Turn the T-handle of the tool until the collar
seats firmly against the crankcase. This will
insure that the seal is seated properly.
6. Loosen the T-handle fully. Loosen the screws
and remove the tool.
B
F-02029