C. if correct end play cannot be obtained, be cer
tain that the correct size rear main bearing has
been installed. Production engines may have
rear main bearings that are 0.008 inch wider
across the thrust faces than standard.
Tighten
• Rear main bearing cap bolts to 106 N-m
(78 lbs. ft.).
Inspect
Crankshaft for binding. Try turning the crankshaft to
check for binding. If the crankshaft does not turn
freely, loosen the main bearing cap bolts, one pair
at a time, until the tight bearing is located. Burrs on
the 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 SEAL
RETAINER INSTALLATION
XJjJf
Clean
• Gasket surfaces on the block and seal retainer.
Install or Connect (Figure 35)
1. New gasket (54) to the block.
• It is not necessary to use sealant to hold the
gasket in place.
2
. Seal retainer (52).
NOTICE: Refer to "Notice
3. Screws (50) and nuts (51).
Tighten
• Screws and nuts to 15 N-m (135 lbs. in.).
on page 6A4-1.
"
CRANKSHAFT REAR OIL
SEAL INSTALLATION
Install or Connect (Figure 36)
Tool Required:
J 35621 Rear Main Seal Installer
• Crankshaft rear oil seal.
A. Lubricate the inner and outer diameter of the
seal with engine oil.
B. Install the seal on J 35621.
C. Position J 35621 against the crankshaft. Thread
the attaching screws into the tapped holes in
the crankshaft.
D. Tighten the screws securely with a screwdriver.
This will ensure that the seal is installed
squarely over the crankshaft.
E. Turn the handle until it bottoms.
F. Remove J 35621.
CAMSHAFT INSTALLATION
Install or Connect (Figures 37 and 38)
• Coat the camshaft lobes and journals with a high
quality engine oil supplement (GM Engine Oil Sup
plement or equivalent).
•A p p ly Engine Oil Supplement (GM P/N 1052367),
or equivalent to all the teeth on the distributor drive
gear.
1
. Two or three 5/16-18 bolts 100-125 mm (4-5
inches) long into the camshaft threaded holes. Use
these bolts to handle the camshaft.
2. Camshaft to the engine (figure 38). Handle the
camshaft carefully to prevent damage to the cam
shaft bearings.
NOTICE: Refer to "Notice" on page 6A4-1.
3. Camshaft retainer and retainer bolts.
Tighten
&
Bolts to 14 N-m (120 lbs. in.)