2008 6.6L Duramax – CYLINDER HEAD REPLACEMENT – LEFT SIDE – Installation Procedure

1. Install the cylinder head gasket o f the correct grade. Refer to Cylinder Head Gasket Selection Specifications.
2. Install the cylinder head.

3. Install N EW M l 2 cylinder head bolts.
4. Reuse the M8 cylinder head bolts.
NOTE: Refer to Fastener Notice .
5. Tighten the cylinder head bolts in the following steps using the sequence shown:

Tighten:
1. Tighten the M 12 bolts a first pass to 50 N.m (37 lb ft).
2. Tighten the M 12 bolts a second pass to 80 N.m (59 lb ft)
3. Tighten the M 12 bolts a third pass to 60 degi’ees, using J 45059 .
4. Tighten the M 12 bolts a final pass to 60 degrees, using J 45059 .
5. Tighten the M8 bolts to 25 N.m (18 lb ft).
6 . Position the ground straps to the rear o f the cylinder head, and install the bolt.
Tighten: Tighten the bolt to 34 N.m (25 lb ft).
7. Install the glow plugs. Refer to Glow Plug Replacement – Bank 2 .
8. Install the valve rocker arm shaft, pushrods, and valve bridges. Refer to Valve Rocker Arm, Shaft, and Push Rod          Replacement.
9. Install the exhaust manifold. Refer to Exhaust Manifold Replacement – Left Side (6.6L) .
10. Install the intake manifold. Refer to Intake Manifold Replacement – Left Side.
11. Install the thermostat housing crossover. Refer to Thermostat Housing Crossover
Replacement (L M M ).
12. Road test the vehicle for normal operation.
13. Inspect for coolant, oil, or exhaust leaks.