Chevrolet Silverado / GMC Sierra. Service manual — part 1973

Fig. 266: View Of Spark Plug And Sparkplug Seat
Courtesy of GENERAL MOTORS CORP.

3. Loosen the spark plug 1 or 2 turns.

4. Brush or air blast away any dirt or debris from around the spark plug.

5. Remove the spark plug.

IMPORTANT: Remove the spark plugs from the cylinder head with the

engine at room temperature.

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. 267: Applying Compressed Air To J 22794
Courtesy of GENERAL MOTORS CORP.

6. Install the J 22794 into the spark plug hole.

7. Attach an air hose to the J 22794 .

8. Apply compressed air to the J 22794 in order to hold the valves in place.

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. 268: Compressing Valve Spring (Cylinder Head Installed) Using Special Tools
Courtesy of GENERAL MOTORS CORP.

9. Use the J 38606 in order to compress the valve spring.

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. 269: Valve Stem Keys, Valve Spring Cap & Valve Spring
Courtesy of GENERAL MOTORS CORP.

10. Remove the valve stem keys (225).

11. Carefully release the valve spring tension.

12. Remove the J 38606 .

13. Remove the valve spring cap (224).

14. Remove the valve spring (223).

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