Envoy 4WD V8-5.3L VIN P (2004)
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 their engine block bearing bores.
10. Inspect the camshaft bearings for excessive wear or scoring.
Bearings with excessive scoring or wear must be replaced.
11. Measure the camshaft journals for wear and out-of-round with a micrometer.
-
If the camshaft bearing journals are more than 0.025 mm (0.001 inch) out-of-round, replace the camshaft.
-
If the camshaft bearing journal diameter is less that 54.99 mm (2.164 inch), replace the camshaft.
12. Measure the camshaft lobes for wear with a micrometer.
-
A 5.3L camshaft with an intake lobe that measures 46.169 mm (1.817 inch) or less must be replaced.
-
A 5.3L camshaft with an exhaust lobe that measures 46.199 mm (1.818 inch) or less must be replaced.
