Front Cover Installation; Torsional Damper Installation - GMC T Series 1994 Repair Manual

Figure 73—Timing Marks
90. Gasket
91. Front Cover
93. Bolt
Figure 74— Front Cover
N O T IC E : R e f e r to "N o t i c e " o n p a g e 6 A 5 -1 .
Tighten
• Camshaft sprocket bolts to specifications.
— 5.0L and 5.7L engines: 28 N-m (21 lbs. ft.).
— 7.4L engines: 26 N-m (20 lbs. ft.).
Measure
€
• Timing chain free play. The free play should not
exceed 16 mm (5/8 inch).

FRONT COVER INSTALLATION

Install or Connect (Figure 74)
• Lubricate the lips of the crankshaft front oil seal
with engine oil.
1. Gasket (90).
2. Front cover (91).
Figure 75— Installing the Torsional Damper
N O T IC E : R e f e r to " N o t i c e " o n p a g e 6 A 5 -1 .
3. Bolts (93).
Tighten
Bolts (93) to specifications:
— 5.0L and 5.7L engines: 10 N-m (96 lbs. in.).
— 7.4L engines: 11 N-m (100 lbs. in.).
TORSIONAL DAMPER
■n- Install or Connect (Figure 75)
Tools Required:
J 39046 Torsional Damper Puller and Installer
F9357
1. Crankshaft key.
N O T IC E : T h e i n e r t i a l w e i g h t s e c t i o n o f
t o r s io n a l d a m p e r is a s s e m b le d
w it h a r u b b e r t y p e
in s ta lla tio n p r o c e d u r e s (w ith t h e p r o p e r to o l)
m u s t b e f o llo w e d o r m o v e m e n t o f th e in e r t ia l
w e i g h t s e c t i o n o f t h e h u b w i l l d e s t r o y t h e
tu n in g o f th e t o r s io n a l d a m p e r .
2
. Stud (item A, figure 75) to the crankshaft. Thread
the stud fully into the tapped hole in the crankshaft.
3. Torsional damper over the end of the stud. Align
the keyway in the torsional damper shaft with the
crankshaft key.
• Use a small amount of RTV sealant to seal the
keyway to crankshaft joint.
4. Bearing, washer, and nut (figure 75).
A. Turn the nut to pull the torsional damper into
place.
B. Remove the tool.
N O T IC E : R e f e r to "N o t i c e " o n p a g e 6 A 5 -1 .
5. Torsional damper bolt and washer.
INSTALLATION
to
m a t e r i a l . T h e
th e
th e h u b
c o r r e c t