Rear Crankshaft Oil Seal In S Ta Lla Tio; Camshaft, Timing Chain And Sprocket In S Ta Lla Tio; Front Cover Installation; Torsional Damper Installation - Chevrolet 1988 Light Duty Truck Repair Manual

6A3-18 4.3 LITER V-6
A. Rear o f Block
80. Screw
81. N ut
82. R etainer
83. Stud
83 84
84. G asket
Figure 27— Rear Crankshaft Oil Seal Retainer
Installation
2. Seal retainer (82).
3. Screws (80) and nuts (81).
T ig h ten
• Screws and nuts to 15.3 N m (135 in. lbs.).
REAR CRANKSHAFT OIL
SEAL INSTALLATION
Install or C o n n e c t (F ig u re 28)
Tool Required:
J 35621 Seal Installer
Rear crankshaft oil seal.
• Lubricate the inner and outer diam eter of the
seal with engine oil.
• Install the seal on J 35621.
• P o sition J 35621
Thread the attaching screws into the tapped
holes in the crankshaft.
F-02922
a g a in s t th e c ra n k s h a ft.
• T ig h te n th e s c re w s
screwdriver. This will ensure that the seal is
installed squarely over the crankshaft.
• Turn the handle until it bottoms.
• Remove J 35621.
CAMSHAFT, TIMING CHAIN
AND SPROCKET INSTALLATION
Install or C o n n ect (F ig u res 29, 30, and 31)
• Coat the cam shaft lobes and journals with a high
q u a lity e ngine oil su p p le m e n t (GM E ngine Oil
Supplem ent or equivalent).
1. Two or three 5/ie-18 bolts 100-125 mm (4-5 inches)
long into the cam shaft threaded holes. Use these
bolts to handle the camshaft.
2. Cam shaft to the engine (figure 30). Handle the
c a m s h a ft c a re fu lly to p re v e n t d a m a g e to the
cam shaft bearings.
3. Thrust plate (87) and screws (88).
T ig h te n
• Screws to 11.9 N m (105 in. lbs.).
Cam shaft sprocket and tim ing chain.
9
Im p o rta n t
• Line up the tim ing marks on the cam shaft
sprocket and crankshaft sprocket (figure 31).
5. Cam shaft sprocket bolts.
$ T ig h te n
• C am shaft sprocket bolts to 28 N m (21 ft. lbs.

FRONT COVER INSTALLATION

Install or C on n ect
1. Front cover gasket to the front cover.
• Use gasket cem ent to hold the gasket in place.
2. Front cover to the engine.
3. Front cover bolts and reinforcements.
T ig h te n
Front cover to block bolts to 13.6 N m (120 in.
lbs.).
TORSIONAL DAMPER
INSTALLATION
Install or C o n n e c t (F ig u re 32)
Tool Required:
J 235 2 3-E , T o rsio n al D a m p e r P u lle r and
Installer
1. Crankshaft key (if removed).
s e c u re ly w ith a