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

6A3-8 4.3 LITER V-6
PISTON AND CONNECTING ROD
REMOVAL
|+"»| Remove or Disconnect (Figures 9 and 10)
Tool Required:
J 5239, Guide Set.
1. Ridge or deposits from the upper end of the cylinder
bores.
• Turn the crankshaft until the piston is at BDC.
Figure 8—Replacing the Camshaft
Figure 7—Camshaft and Components
• Mark the cylinder number on all pistons, connecting
2. Connecting rod cap. Check the connecting rod and
3. Connecting rod and piston.
4. Connecting rod bearing.
A Ridge Reamer
B Cloth
• Place a cloth on top of the piston.
• Perform the cutting operation with a ridge
reamer (figure 9).
• Turn the crankshaft until the piston is at TDC.
• Remove the cloth and cuttings.
rods, and caps. Starting at the front, the cylinders on
the left bank are numbered 1-3-5 and the right bank
is numbered 2-4-6.
cap for identification marks. Mark the parts if
required. The connecting rod and cap must be kept
together as mating parts.
• Attach J 5239 to the connecting rod bolts
(figure 10).
• Use the long guide rod of J 5239 to push the
connecting rod and piston out of the bore.
Figure 9—Removing the Cylinder Ridge
-05065