Main Bearing Replacement - GMC G Service Manual

6A6-24 6.2L DIESEL
Figure 26 — Ring Gap Location
Figure 27 — Installing the Piston and
Connecting Rod
|4H| Measure
• Connecting rod bearing clearance. Refer to the
1988 Light Duty Trucks Unit Repair Manual.
3. Connecting rod cap and bearing.
4. Connecting rod cap nuts.
Tighten
• Connecting rod cap nuts to 65 N»m (48 ft. lbs.).
|^ 3l Measure
• Connecting rod side clearance. Use a feeler
gage between the connecting rod and crank­
shaft (figure 28). The correct clearance is 0.17-
0.63 mm.
5. Oil pump (if removed), as outlined previously.
6. Oil pan, as outlined previously.
7. Cylinder head. Refer to "Cylinder Head Replacement"
in this section.
28
Figure — Checking Connecting Rod
Side Clearance

MAIN BEARING REPLACEMENT

E Remove or Disconnect (Figure
Tool Required:
J 8080 Main Bearing Remover/Installer
1. Glow plugs.
2. Oil pan and oil pump, as outlined previously.
3. Main bearing caps.
• Check the main bearing caps for location mark­
ings. Mark the caps if necessary. The caps
must be returned to their original locations dur­
ing assembly.
4. The lower main bearing inserts from the main bearing
caps.
5. Rear crankshaft oil seal (if necessary). Refer to "Rear
Crankshaft Oil Seal Replacement" in this section.
6. Upper main bearing inserts.
• Insert J 8080 into the crankshaft oil hole (figure
29).
• Rotate the crankshaft to "turn" the bearing insert
out of the block.
o
B-04580
29)