Oil Pump In Stallatio; Oil Pan Installation - Chevrolet 1988 Light Duty Truck Repair Manual

6A4-28 4.8 LITER L6
• W ith the connecting rod cap removed, install
J-5329 onto the connecting rod studs (69).
• Locate the piston ring end gaps as shown in
figure 87. Lubricate the piston and rings (101,
102, and 105) with engine oil.
• Locate the ring end gaps as shown in figure
54.
• W ithout disturbing the ring end gap location,
install J-8037 over the piston (figure 55).
• The piston must be installed so that the piston
crow n d e p re s s io n 's fla t side faces to the
engine's left side (figure 56).
• Place the piston in its m atching bore. Using
light blows with a ham m er handle, tap the
piston down into its bore (figure 55). At the
same tim e, guide the connecting rod into
piston on th e cra n kp in , using the J-5329
G uide Tool. Hold the ring com pressor against
the block until all rings have entered the
cylinder bore.
3. C o n n e c tin g rod cap (110) w ith the low er
connecting rod bearing insert.
A. F ro n t o f E ngine
B. F lyw h e e l S id e o f Engine
C. P isto n D ep re ssion F lat Side
Figure 56 — Pistons Installed
Measure
• C onnecting rod bearing clearance. Refer to
GENERAL ENGINE M ECHANICAL (SEC. 6A).
Then apply engine oil to the connecting rod
bearing.
4. Nuts (111).
Tighten
Nuts (111) to 80 N-m (60 ft. lbs.).
m
Measure (Figure 57)
C onnecting rod side clearance. Use a feeler
g a g e .
0.006-0.017-inch.
OIL PUMP INSTALLATION
Install or Connect (Figure 5)
1. Oil pump (151).
2. Bolts (148) and nut (149).
^ X \
Tighten
• Bolts (148) to 13.0 N m (115 in. lbs.).
• Nut (149) to 34 N m (26 ft. lbs.).

OIL PAN INSTALLATION

-► + Install or Connect (Figure 5)
1. Rear oil pan seal (141).
2. Front oil pan seal (147).
3. Gaskets (142).
4. Oil pan (146).
5. Bolts (145).
Tighten
— 1 /4-20 bolts to 9.0 N m (80 in. lbs.).
— 5/ i 6-18 bolts (except oil pan [146] to front cover
[157] bolts) to 18.6 N m (165 in. lbs.).
B-05256
— Oil pan (146) to front cover (157) bolts to 5.1
N m (45 in. lbs.).
T h e p ro p e r c le a ra n c e is