Timing Chain and Sprockets Cleaning and Inspection

WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the timing chain guides 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 shoe for wear.
Replace the timing chain tensioner shoe if wear exceeds 1.12 mm (0.045 in) depth on the chain guide surface.
Inspect the timing chain and sprockets for wear.
Inspect the camshaft sprocket faces for signs of movement.

Fig 1: Inspecting Timing Chain Guides, Sprockets & Timing Chain
Courtesy of GENERAL MOTORS CORP.
Inspect the camshaft sprocket teeth and chain for signs of excessive wear, chipping, or seizure of the timing chain links.
Inspect the oil nozzle body for collapse or cracks at the bolt boss. Discard and replace the oil nozzle body if it is damaged.