Camshaft, Timing Chain, And Sprocket Installation - GMC T Series 1994 Repair Manual

80. SCREW, SEAL RETAINER
81. NUT, SEAL RETAINER
82. RETAINER, SEAL
83. STUD, SEAL RETAINER
84. GASKET, SEAL RETAINER
114. BLOCK, ENGINE
Figure 70— Crankshaft Rear Oil Seal Retainer (5.0L and 5.7L Engines)
Figure 71— Installing the Crankshaft Rear Oil Seal
(5.0L and 5.7L Engines)
B. Lubricate the inner and outer diameter of the
seal with engine oil.
C. Install the seal on J 35621.
D. Position J 35621 against the crankshaft. Thread
the attaching screws into the tapped holes in
the crankshaft.
E. Tighten the screws securely with a screwdriver.
This will ensure the seal is installed squarely
over the crankshaft.
F. Turn the handle until it bottoms.
G. Remove J 35621.
CAMSHAFT, TIM IN G CHAIN,
AND SPROCKET INSTALLATION
+4* Install or Connect (Figures 72 and 73)
Coat the camshaft lobes and journals with Engine
Oil Supplement (GM P/N 1051396) or equivalent.
Camshaft (figure 72).
• U s e three 5/16-18 bolts 100-125 mm (4-5
inches) long threaded into the cam shaft's
tapped holes to handle the camshaft.
• Use care to avoid damaging the camshaft bear­
ings.
• Remove the three bolts after installation.
Figure 72— Installing the Camshaft
2. Timing chain to the camshaft sprocket.
3. Camshaft sprocket and timing chain to the engine.
9
Important
• Align the timing marks on the camshaft sprock­
et and crankshaft sprocket (figure 73).
4. Camshaft sprocket bolts. Use the bolts to draw the
camshaft sprocket onto the camshaft. DO NOT
A T T E M P T TO H A M M E R T H E C A M S H A F T
SPROCKET ONTO THE CAMSHAFT. DOING SO
MAY DISLODGE THE REAR CAMSHAFT PLUG.
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