Chevrolet 1988 Light Duty Truck Repair Manual page 376

6A1-24 2.5 LITER L4 ENGINE
MAIN BEARING INSTALLATION
(WITHOUT REMOVING THE
CRANKSHAFT)
Install or C o n n e c t (F ig u res 5 and 42)
Tool Required:
J 8080 Main Bearing Rem over/Installer
1. Upper main bearing inserts.
• Insert tool J 8080 into a cra n ksh a ft main
bearing hole.
• Apply engine oil to the proper sized inserts.
• Insert the plain end of the insert (without the
b e a rin g ta n g ) of the in s e rt betw e en the
crankshaft and the notched side of the block.
• Rotate the crankshaft to " ro ll" the insert into
the block.
• Remove the tool.
2. Lower main bearing inserts to the main bearing
caps.
• Make sure the inserts are of the proper size.
• Apply engine oil to the inserts.
M easu re
Main bearing clearance and crankshaft end
play. Refer to " Crankshaft and Main Bearing
Installation" in this section.
CAMSHAFT INSTALLATION
0
Install or C o n n e c t (F ig u re 3, 43, and 44)
• C o a t th e c a m s h a ft
S u p p le m e n t (G M p a rt n u m b e r 1 0 5 1396 ) or
equivalent. Coat the bearing journals with engine
oil.
1. Cam shaft (108) into the block (119). Take care not to
dam age the cam shaft bearings (109).
lo b e s w ith E n g in e O il
104 108
105
103
A T im in g M a rks
87. C ra n k s h a ft G ear
T h ru s t P late B o lts
C a m s h a ft G ear
T h ru s t P late
C a m s h a ft
Figure 4 3 — Camshaft and Timing Gears
Im p o rta n t
• Align the tim ing marks.
2. Screws (103).
T ig h te n
Screws (103) to 9.0 N m (80 in. lbs.
FRONT COVER
INSTALLATION
-►+ Install or C o n n e c t (F ig u re s 5, 45 and 46)
Tool Required:
J 34995 Crankshaft Front Cover
Oil Seal Installer
1. Tool J 34995 into the front cover seal.
• Apply a 10 mm (3/s-inch) w ide by 5 mm (3/i6-inch)
thick bead of RTV sealer to the oil pan at the tim ing
gear cover sealing surface.
• Apply a 6 mm (1 /4-inch) by 3 mm (Vs-inch) thick bead
of RTV to the tim ing gear cover at the block sealing
surface. Refer to figure 45.
NOTICE: The c o rre c t to o l m u s t be u s e d to a lig n
th e t im in g g e a r c o v e r s o th a t th e f r o n t
c ra n k s h a ft seal is p ro p e rly c e n te re d a ro u n d the
c ra n k s h a ft. The s e a l m u s t be c e n te r e d to
p re v e n t dam age d u rin g h u b in s ta lla tio n .
2. Tim ing gear cover, with J 34995 in place, to the
block.
F-05719