Camshaft Removal; Piston And Connecting Rod Removal - GMC 1990 Light Truck Repair Manual

6A2-10 2.8 LITER V
A. Front
40. Bolt
41. Oil Pump
42. Shaft
Figure 12—Oil Pump Installation

CAMSHAFT REMOVAL

+•+ Remove or Disconnect (Figure 13)
Camshaft by pulling lightly and turning.
Important
• All camshaft bearing journals are the same
diameter and care must be exercised in
removing the camshaft to avoid bearing
damage.
PISTON AND CONNECTING
ROD REMOVAL
+ + Remove or Disconnect
1. Ridge or deposits from the upper end of the cylinder
bores.
• Turn the crankshaft until the piston is at BDC.
• Place a cloth on top of the piston.
• Perform the cutting operation with a ridge
reamer (figure 14).
• Turn the crankshaft until the piston is at TDC.
• Remove the cloth and cuttings.
• Use a silver pencil or quick drying paint to mark the
cylinder number on all pistons, connecting rods, and
caps. Starting at the front of the crankcase, the
cylinders in the right bank are numbered 1-3-5 and
the left bank is numbered 2-4-6.
2. Connecting rod cap and bearing.
-6
F-6523
Figure 13—Replacing the Camshaft (Typical)
3. Connecting rod and piston (figure 15).
• Install guide hose over the threads of the rod
studs to prevent damage to the bearing journal
and rod studs.
4. Connecting rod bearing.
A Ridge Reamer
B Cloth
Figure 14—Removing the Cylinder Ridge