Camshaft Bearings; Front Cover - GMC 1990 Light Truck Repair Manual

A. Arbor Press
B. Press Tool
104. Camshaft Gear
105. Thrust Plate
108. Camshaft
Figure 29—Installing the Camshaft Gear
NOTICE: The thrust plate must be positioned
so that the woodruff key (107) does not damage
it during the removal operation.
• Press the camshaft (108) out of the camshaft
gear.
2. Thrust plate (105).
3. Spacer (106).
*
Assemble (Figure 29)
• Support the camshaft on the back of the front
journal in an arbor press using press plate adapters.
• Lubricate the thrust plate with engine oil.
1. Woodruff key (107).
2. Spacer (106).
3. Thrust plate (105).
4. Camshaft gear (104).
• Make sure that the timing 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.
t j | Measure (Figure 27)
• Camshaft to thrust plate clearance using a feeler
gage.The correct clearance is 0.0015-inch to 0.0050-
inch.

CAMSHAFT BEARINGS

+ + Remove or Disconnect (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
Figure 30—Removing or Installing Camshaft Bearings
Install or Connect (Figure 30)
Tool Required:
J 33049 Universal Camshaft Bearing
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
aligned with the oil holes in the block.
2. Rear bearing (109) and expansion plug.
• Drive the bearing in from the rear of the
engine.
• Make sure that the oil holes in the bearing are
aligned with the oil holes in the block.
• Drive the expansion plug into the block from
the rear of the engine.
3. Front bearing (109).
• Drive the bearing into the block, and
approximately 3.18 mm (Vs-inch) past the front
surface of the block. This uncovers the timing
gear oil nozzle hole.
Clean
Old RTV sealant from the sealing flange.
L*
Inspect
Front cover for cracks, large dents, etc.
Sealing flange for straightness.
Disassemble (Figure 5)
Seal (101). Pry the seal out with a screwdriver.
*
Assemble (Figure 31)
Tool Required:
J 34995 Crankshaft Front Cover
Oil Seal Installer
New seal (101) using tool J 34995.
— Support the inside of the front cover around
the seal bore area.
A. Bearing Tool
B. Driver Handle
Remover and Installer

FRONT COVER

B-05233