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7. Inspect the camshaft sprocket pin (204) for damage. 8. Inspect the camshaft retainer plate for wear or a damaged sealing gasket. If the camshaft retainer plate sealing gasket is not cut or damaged, it may be used again. Fig. 63: Camshaft Bearings 9. Inspect the camshaft bearings for proper fit in the engine block. Camshaft bearings have an interference fit to the engine block and should not be loose in the engine block bearing 10. Inspect the camshaft bearings for excessive wear or scoring.
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
Bearings with excessive scoring or wear must be replaced. Fig. 64: Measure Camshaft Journals With Micrometer 11. Using a micrometer, measure the camshaft journals for wear and out-of-round. If the camshaft bearing journals are greater than 0.025 mm (0.001 in) out-of-round, If the camshaft bearing journal diameter is less than 54.99 mm (2.164 in), replace the
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. 65: Measuring Camshaft Lobes 12. Using a micrometer, measure the camshaft lobes for wear. Refer to Engine Mechanical Specifications (RPO LY5 VIN J) or Engine Mechanical Specifications (RPO LC9
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. 66: Measuring Camshaft Runout 13. Measure the camshaft runout. 1. Mount the camshaft in wooden V-blocks or between centers on a fixture. 2. Using the J 7872 , measure the runout of the intermediate camshaft bearing journals. 3. If camshaft runout exceeds 0.05 mm (0.002 in), the camshaft is bent and should be replaced. Measuring Camshaft Lobe Lift
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
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