Chevrolet Silverado / GMC Sierra. Manual — part 55

Fig. 159: Using J 3049-A To Remove Sticking Valve Lifters
Courtesy of GENERAL MOTORS CORP.

5. Use the J 3049-A in order to remove the stuck valve lifters. See Special Tools.

6. Use a cleaning solvent and a shop towel to clean any varnish from the valve lifter bores.

7. Inspect the lifter bores for excessive wear or scoring. Replace the engine block if there is

IMPORTANT: Some valve lifters may be stuck in the valve lifter bores

because of gum or varnish deposits and may require the use
of J 3049-A for removal. See Special Tools.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

excessive wear or deep scoring.

8. Inspect the camshaft for wear or damage. If the wear is questionable remove the camshaft

and inspect. Refer to Camshaft and Bearings Cleaning and Inspection.

9. Clean and inspect the lifters, if necessary. Refer to Valve Lifters and Guides Cleaning

and Inspection.

Installation Procedure

IMPORTANT: It is normal for NEW lifters to make a slight ticking noise when

the engine is first started. Increasing the engine RPM slightly to
raise oil pressure should stop the noise.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado