Chevrolet Silverado / GMC Sierra. Service manual — part 1979

Fig. 287: Identifying Cylinder Head Locating Pins Installation Position
Courtesy of GENERAL MOTORS CORP.

1. Clean the engine block cylinder head bolt holes, if required. Thread repair tool J 42385-

107, found in J 42385-200 may be used to clean the threads of old threadlocking material.
See Special Tools .

2. Spray cleaner GM P/N 12346139, P/N 12377981 (Canadian P/N 10953463), or equivalent

into the hole.

3. Clean the cylinder head bolt holes with compressed air.

4. Check the cylinder head locating pins for proper installation (a) 8.3 mm (0.327 in).

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 288: View Of Cylinder Head Gasket & Locating Pins
Courtesy of GENERAL MOTORS CORP.

5. Install the NEW cylinder head gasket (217) onto the locating pins.

IMPORTANT: When properly installed, with FRONT on the right side, the

tab on the cylinder head gasket should be located right of
center.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 289: View Of Cylinder Head & Bolts
Courtesy of GENERAL MOTORS CORP.

6. Install the cylinder head (218) onto the locating pins.

7. Install the NEW cylinder head bolts (220, 221).

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 290: Cylinder Head Bolt Tightening Sequence
Courtesy of GENERAL MOTORS CORP.

8. Tighten the cylinder head bolts.

Tighten:

1. Tighten the M11 cylinder head bolts (1-10) a first pass in sequence to 30 N.m (22 lb

ft).

2. Tighten the M11 cylinder head bolts (1-10) a second pass in sequence to 90 degrees

using J 45059 .

3. Tighten the M11 cylinder head bolts (1-10 ) a final pass to 70 degrees in sequence

using J 45059 .

4. Tighten the M8 cylinder head bolts (11-15) to 30 N.m (22 lb ft). Begin with the center

bolt (11) and alternating side-to-side, work outward tightening all of the bolts.

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado