Oil Pump Installation - GMC T Series 1994 Repair Manual

2. Piston and connecting rod to the proper bore.
A. With the connecting rod cap removed, install
J 5239 onto the connecting rod bolts.
B. Locate the piston ring end gaps as shown in
figure 76 (5.0L and 5.7L engines) or figure 77
(7.4L engines).
C. Lubricate the piston and rings with engine oil.
D. Without disturbing the ring end gap location,
install J 8037 over the piston (figure 80).
E. Use a hammer handle to tap the piston down
into its matching bore.
• On 5.0L and 5.7L engines, the notch in the
piston crown (figure 76) must face the front
of the engine.
• On 7.4L engines, the dimple must face the
front of the block (figure 81).
F. While tapping the piston into its bore, guide the
connecting rod into position on the crankpin,
using J 5239. Hold the ring compressor against
the block until all rings have entered the cylin­
der bore.
V Important
• Each co n n e ctin g rod and bearing cap
should be marked, beginning at the front of
the engine. Cylinder 1, 3, 5 and 7 are the
right bank and 2, 4,
bank (when viewed from the front of the
engine). The numbers on the connecting rod
and bearing cap must be on the same side
when installed in the cylinder bore. If a con­
necting rod is ever transposed from one
block or cylinder to another, new connecting
rod bearings should be fitted and the con­
necting rod should be numbered to corre­
spond with the new cylinder number.
N O T IC E : R e f e r to " N o t i c e
3. Connecting rod cap with bearing insert and nut.
Measure
• Connecting rod bearing clearance. Refer to
6
SECTION A. Then apply engine oil to the con­
necting rod bearing.
Connecting rod bolt nuts to specifications.
•
— 5.0L and 5.7L engines: 60 N-m (45 lbs. ft.).
66
— 7.4L engines:
Measure (Figure 82)
M
Connecting rod side clearance. Use a feeler gage
between the connecting rods (figure 82). The prop­
er clearance is as follows:
— 5.0L and 5.7L engines: 0.1524 -0 .3556-mm
(0.006-0.014-inch).
— 7 . 4 L e n g i n e s :
(0.013-0.023-inch).

OIL PUMP INSTALLATION

■n- Install or Connect
1
. Oil pump with connector and oil pump driveshaft.
6 8
, and are the left
"
o n p a g e 6 A 5 -1 .
N-m (48 lbs. ft.).
3 3 0 2 0 8
0 . - . 5 4 2 - m m