2008 6.6L Duramax – PISTON, CONNECTING ROD, AND BEARING INSTALLATION – Installation

1. Select the connecting rod bearing according to the Connecting Rod Bearings Selection Specifications chart.
2. Position the crankshaft so the connecting rod journal is opposite the piston and connecting rod assembly being             installed.

3. Install the connecting rod bearing inserts.
4. Lubricate the cylinder wall and piston rings with engine oil.
5. Install the J 8037 to the piston to compress the piston rings.

6. Orientate the piston front mark and the piston inside mark to the engine block.

7. Push the piston and connecting rod assembly into the engine.

8. Install the gauging plastic onto the connecting rod journal. Install the gauging plastic the foil width o f the                      journal.
9. Install the connecting rod cap with its stamped cylinder number aligned with the stamped cylinder number on the       connecting rod.

NOTE: Refer to Fastener Notice.

10. Install the original connecting rod cap bolts for the plastic gauging. N EW bolts will be used for final assembly.
11. Tighten the bolts in three steps.
Tighten:
1. 1st step 64 N.m (47 lb ft)
2. 2nd step 30 degrees using J 45059
3. 3rd step 30 degrees using J 45059
12. Remove the connecting rod cap bolts.
13. Compare the width o f the gauging plastic with the scale printed on the gauging plastic container. The connecting        rod bearing clearance should be 0.10 mm (0.0039 in).
14. Discard the original connecting rod bolts once the plastic gauging is completed. NEW connecting rod bolts will            be used for final assembly.
15. Carefully clean the gauging plastic from the bearing surface and the crankpin.
16. Lubricate the connecting rod bearing inserts with engine oil.
17. Install the connecting rod caps with the stamped cylinder number aligned with the stamped cylinder number on          the connecting rods.

NOTE: This component uses bolts with a preapplied molybdenum disulfide coating for thread lubrication. Do not                    remove the coating or use any additional lubricant. Improperly lubricated threads will adversely affect the                    bolt torque and clamp load. Improper bolt torque and clamp load can lead to engine damage.

18. Install NEW connecting rod cap bolts.
19. Tighten the connecting rod cap bolts in three steps.
Tighten:
1. 1st step 64 N.m (47 lb ft)
2. 2nd step 30 degrees using J 45059
3. 3rd step 30 degrees using J 45059