Chevrolet Silverado / GMC Sierra. Manual — part 475
1. Install the valve spring lower seat.
2. Install the valve stem seal using J 44640 . See Special Tools .
NOTE:
Air pressure should remain applied to the cylinder for
installation.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 211: View Of Valve Stem Oil Seal & Valve Spring
Courtesy of GENERAL MOTORS CORP.
3. Install the valve spring (3), the painted end of the valve spring goes toward the cylinder
head.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
4. Install the valve spring upper seat (2).
Fig. 212: Compressing Valve Spring Using J 44646
Courtesy of GENERAL MOTORS CORP.
CAUTION: Compressed valve springs have high tension against the
valve spring compressor. Valve springs that are not
properly compressed by or released from the valve spring
compressor can be ejected from the valve spring
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
5. Using J 44646 compress the valve spring. See Special Tools .
6. Install the valve keys to the valve stem.
7. Carefully release the valve spring pressure. Make sure the valve keys stay in place.
8. Continue to install the 3 remaining valve stem seals for the cylinder.
compressor with intense force. Use care when
compressing or releasing the valve spring with the valve
spring compressor and when removing or installing the
valve stem keys. Failing to use care may cause personal
injury.
NOTE:
The valve stem keys must correctly seat in the valve spring
cap. Engine damage may occur by not installing properly.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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