Camshaft Bearings; Front Cover - GMC 1989 Light Duty Truck Repair Manual

A. A rb o r Press
B. Press Tool
104. C a m s h a ft G ear
105. T h ru s t Plate
108. C a m s h a ft
104
108
Figure 29— Installing the Camshaft Gear
NOTICE: The thrust p la te m ust be p osition ed
so that the w o o d ru ff key (1 0 7 ) does n o t dam age
it during the rem oval operation.
• Press the camshaft (108) out of the camshaft
gear.
2. Thrust plate (105).
3. Spacer (106).
*
A ssem ble (Figure 29)
• Support the cam shaft on the back of the front
journal in an arbor press using press plate adapters.
• Lubricate the thrust plate with engine oil.
1. W oodruff key (107).
2. Spacer (106).
3. Thrust plate (105).
4. Camshaft gear (104).
• Make sure that the tim ing mark is to the
outside.
• Press the camshaft gear onto the camshaft
until it bottoms on the spacer (106).
• Remove the camshaft from the press.
M easure (Figure 27)
m
Camshaft to thrust plate clearance using a feeler
gage.The correct clearance is 0.0015-inch to 0.0050-
inch.

CAMSHAFT BEARINGS

0
* ± i R em ove or D isconnect (Figure 30)
Tool Required:
J 33049 Universal Camshaft Bearing
Remover and Installer
1. Expansion plug.
• Drive out the plug from inside the block at the
rear camshaft bearing.
2. Front and rear bearings (109) using J 33049.
• Drive the bearings towards the center of the
block.
3. Center bearing using J 33049.
• Drive the bearing towards the rear of the
engine.
2.5 LITER L4 ENGINE 6A1-17
F-02027
-►+ Install or C onnect (Figure 30)
Tool Required:
1. Center bearing using J 33049.
• Install the bearing from the front of the engine.
• Make sure that the oil holes in the bearing are
2. Rear bearing (109) and expansion plug.
• Drive the bearing in from the rear of the
• Make sure that the oil holes in the bearing are
• Drive the expansion plug into the block from
3. Front bearing (109).
• D riv e th e b e a rin g
Clean
Old RTV sealant from the sealing flange.
Inspect
Front cover for cracks, large dents, etc.
Sealing flange for straightness.
*
D isassem ble (Figure 5)
Seal (101). Pry the seal out with a screwdriver.
*
Assem ble (Figure 31)
Tool Required:
J 34995 Crankshaft Front Cover
Oil Seal Installer
New seal (101) using tool J 34995.
—
J 33049 Universal Camshaft Bearing
Remover and Installer
aligned with the oil holes in the block.
engine.
aligned with the oil holes in the block.
the rear of the engine.
in to th e b lo c k , and
approximately 3.18 mm (Vs-inch) past the front
surface of the block. This uncovers the timing
gear oil nozzle hole.

FRONT COVER

Support the inside of the front cover around
the seal bore area.