Oil Pan Installation; Oil Pump Driveshaft Installation; Cylinder Head Installation - GMC 1990 Light Truck Repair Manual

2. Oil pump bolts (84) and nut (78).
Tighten
Bolts to 25 N m (18 ft. lbs.)
Nut to 42 N m (31 ft. lbs.)

OIL PAN INSTALLATION

Install or Connect (Figures 5 and 51)
• Apply RTV sealant to the oil pan flange and block.
Refer to figure 51.
1. Oil pan (76).
2. Bolts (75).
7.5 mm ('Vui-lnch) W ide x
A.
2.5 mm (V ^-lnch) Thick
4 mm (//:i 2 -lnch) W ide x
B.
2.5 mm p/ -lnch) Thick
32
3 mm (1 /H-lnch) Bead In
C.
Areas Shown
D. Front Of Engine
76. Oil Pan
Block
119.
Rear Main Bearing Cap
126.
Figure 51—Applying RTV to the Oil Pan and Block
2.5 LITER L4 ENGINE 6A1-27
Tighten
• Oil pan bolts to 10.0 N m (90 in. lbs.).
OIL PUMP DRIVESHAFT
INSTALLATION
Install or Connect (Figures 5 and 52)
1. Shaft and gear assembly (115 and 114). Turn the
shaft until it indexes the oil pump shaft pilot properly
in the oil pump body.
2. Bearing (113).
3. Plate (118). Apply RTV to the plate as shown in
figure 52.
4. Bolts (117).
Tighten
• Bolts to 14 N m (120 in. lbs.).

CYLINDER HEAD INSTALLATION

■H" Install or Connect (Figures 3 and 53)
• Make sure the block and cylinder head sealing
surfaces are clean.
1. Head gasket to the block. Install over the dowel
pins.
2. Cylinder head. Carefully guide the head into place
over the dowel pins. This may require an assistant.
3. Cylinder head bolts. Refer to figure 53.
F-05718