Duramax LLY – OILPUMP, OIL PAN, FLYWHEEL INSTALLATION

1. Pour 2-3 ounces engine oil into pump and rotate pump shaft to lubricate pump gears.

2. Install retainer and pump shaft in oil pump. Apply high temp bearing grease to upper end of shaft.

3. Install oil pump. Be sure pump is seated on rear main cap. Refer to Oil Pump Drive Removal in this section for more information.

4. Install pump mounting stud. Tighten stud to 59-74 lb-ft (80-100 N•m).

5. Seat pump pickup tube bracket on mounting stud. Tighten bracket nut to 35 lb-ft (47 N•m) torque. Tighten screw that secures bracket to pump pickup tube to 12 lb-ft (16 N•m) torque.

6. Apply silicone sealer, such as Permatex High Temp, Ultra Blue, or Ultra Black to surfaces of oil pan mounting flange surfaces (Figure 2-164).

7. Apply sealer to pan rear seal (Figure 2-164). Then press seal into place on oil pan. Coat seal ends with sealer as well.

8. Apply silicone sealer around two holes in right side panel rail on block (Figure 2-164).

9. Align and position oil pan on engine block pan rails. Tighten larger diameter bolts at rear of pan to 17 lb-ft (23 N•m) torque. Tighten remaining bolts/studs to 89 lb-in. (10 N•m) torque.

NOTE: Be sure pan rear seal was not displaced during pan installation.

10. Clean crankshaft flange and flywheel mounting surfaces.

11. Install flywheel on flange (Figure 2-165). Be sure converter bolt pads are facing out and away from engine.

12. Apply 1-2 drops Loctite 242 to new flywheel bolts (but only if new bolts do not have pre-applied thread locker). Then install and tighten bolts 65 lb-ft (88 N•m) torque.

 

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