Camshaft Timing Drive Components Cleaning and Inspection
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Courtesy of GENERAL MOTORS COMPANY
Inspect the timing chain guides (2, 5, 7) for cracking or wear.
- Replace the timing chain guides if wear exceeds 1.12 mm (0.045 in) depth on the chain guide surface.
- Inspect the timing chain tensioner (1) shoe for wear.
- Replace the timing chain tensioner if shoe wear exceeds 1.12 mm (0.045 in) depth on the chain guide surface.
- Inspect the timing chain (6) and actuators (3, 4) for wear.
- Inspect the camshaft actuator faces for signs of movement.
- Inspect the camshaft actuator teeth and chain for signs of excessive wear, chipping, or seizure of the timing chain links.
- Inspect the crankshaft sprocket (8) for excessive wear or chipping.