Duramax LLY – CRANKSHAFT MAIN CAP TORQUE SEQUENCE

1. Tighten the inner 12 mm bolts to 55 lb-ft (75 N.m).

2. Retighten the inner 12 mm bolts to 55 lb-ft (75 N.m).

3. Tighten the inner 12 mm bolts an additional 90 degrees.

4. Tighten the outer 12 mm bolts (crankshaft bearing caps 1 and 5) to 48 lb-ft (65 N.m).

5. Retighten the outer 12 mm bolts (crankshaft bearing caps 1 and 5) to 48 lb-ft (65 N.m).

6. Tighten the outer 12 mm (crankshaft bearing caps 1 and 5) an additional 90 degrees.

7. Tighten the outer 10 mm bolts (bearing caps 2, 3, and 4) to 30 lb-ft (40 N.m).

CAUTION: DO NOT tighten the outer 10 mm bolts an additional 90 degrees!

8. Check the crankshaft for proper rotation.

NOTE: If crankshaft does not rotate freely or binds in spots, problem may be: misaligned main caps, bearing incorrectly installed, foreign material on bearing or journal, wrong bearing size.

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