GMC T Series 1994 Repair Manual page 527

C. Perform the cutting operation with a ridge ream­
er (figure 28). Do not remove excessive mate­
rial. Excessive removal of m aterial may
require cylinder reboring to the next over­
size.
D. Turn the crankshaft until the piston is at TDC.
E. Remove the cloth and cuttings.
2. Connecting rod cap. Check the connecting rod and
cap for identification marks. Mark the parts if
required. The connecting rod and cap must be kept
together as mating parts.
3. Connecting rod and piston.
A. Attach two short pieces of 10-mm (3/8-inch)
hose to the connecting rod bolts (figure 29).
This will protect the crankshaft journal during
removal.
B. Push the connecting rod and piston out of the
bore.
C. After removal, assemble the connecting rod and
cap.
Figure 28— Removing the Cylinder Ridge
REAR CRANKSHAFT SEAL
REMOVAL
Remove or Disconnect (Figure 30)
1. Oil seal (79) using a small screw driver. Do not
reuse old seal.
CRANKSHAFT REMOVAL
Remove or Disconnect (Figure 31)
• Check the main bearing caps for location markings.
Mark the caps if necessary. The caps m ust be
returned to their original locations during the engine
assembly.
1. Bolts (73).
2. Main bearing caps (75).
3. Crankshaft (83).
• Lift the crankshaft straight up, taking care to
avoid damage to the crankshaft journals and
thrust flange surfaces.
4. Main bearing inserts (76, 77, and 78).
6. ENGINE BLOCK
75. REAR MAIN BEARING CAP
79. REAR OIL SEAL
83. CRANKSHAFT
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