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1. The markings on the gasket are as follows: Grade A (1) Grade B (2) Grade C (3) Block over-bored 0.010-0.030 in (0.254-0.762 mm) (4) Block over-bored 0.010-0.030 in (0.254-0.762 mm) and deck milled 0.008 in (0.203 2. Install the left cylinder head gasket of the correct grade. The left and right cylinder head gaskets are not interchangeable. Refer to Cylinder Head Gasket Selection.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 120: View Of Left Cylinder Head Gasket 3. Install the left cylinder head. Fig. 121: Cylinder Head Bolt Tightening Sequence 4. Install the NEW M12 cylinder head bolts. NOTE: This component uses bolts with a preapplied molybdenum NOTE: Refer to Fastener Notice .
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Tighten the M12 cylinder head bolts in three steps: Tighten: 1. 1st step 50 N.m (37 lb ft) 2. 2nd step 80 N.m (59 lb ft) 3. 3rd step tighten 60 degrees using J 45059 4. 4th step tighten 60 degrees using J 45059 5. Reuse the M8 bolts. Install the M8 bolts. Tighten: Tighten the M8 cylinder head bolts to 25 N.m (18 lb ft). CYLINDER HEAD INSTALLATION - RIGHT SIDE Tools Required J 45059 Angle Meter Installation
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 122: View Of Cylinder Head Gasket Markings NOTE: The left and right cylinder head gaskets are not IMPORTANT: The stamped letter, R or L, must face up. R is the right bank, L is the left bank.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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