Camshaft Bearings - Chevrolet 1991 Light Duty Truck Repair Manual

0.0015-inch replace the spacer ring (106). If the
clearance is more than 0.0050-inch, replace the
thrust plate (105).
jjjSj] Disassemble (Figure 26)
1. Gear (104) from the camshaft.
• Place the camshaft gear in a press. Support
the camshaft gear. DO NOT support the thrust
plate.
NOTICE:The thrust plate m ust be positioned
so that the w oodruff key (107) does not dam­
age it during the removal operation.
• Press the camshaft (108) out of the camshaft
gear.
2. Thrust plate (105).
a Spacer (106).
Assemble (Figure 27)
• Support the camshaft on the back of the front jour­
nal 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).
Arbor Press
A.
Press Tool
B.
Camshaft Gear
104.
Thrust Plate
105.
Camshaft
108.
Figure 27— -Installing the Camshaft Gear
4. Camshaft gear (104).
• Make sure that the timing mark is to the out­
side.
• Press the camshaft gear onto the camshaft
until it bottoms on the spacer (106).
• Remove the camshaft from the press.
1 Measure (Figure 25)
• Camshaft to thrust plate clearance using a feeler
gage.
•T h e correct clearance is 0.0015-inch to
0.0050-inch.

CAMSHAFT BEARINGS

|* + l Remove or Disconnect (Figure 28)
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.
Install or Connect (Figure 28)
&
Tool Required:
J 33049 Universal Camshaft Bearing Remover
and Installer
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.
F2027
Figure 28—Removing or Installing Camshaft
2.5L L4 ENGINE 6A1-15
Bearings