Timing Chain and Sprockets Cleaning and Inspection

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Clean the components with cleaning solvent.

CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.

Dry the components with compressed air.

Fig 1: View Of Camshaft & Crankshaft Sprockets Timing Marks Aligned

Courtesy of GENERAL MOTORS CORP.

Inspect the timing chain for binding or wear.

Fig 2: Identifying Damaged Sprocket Teeth

Courtesy of GENERAL MOTORS CORP.

Inspect the camshaft and crankshaft sprockets for:
- Worn teeth (1)
- Damaged teeth (2)
- Chipped teeth (3)
- Worn valleys between the sprocket teeth

Fig 3: View Of Crankshaft Sprocket

Courtesy of GENERAL MOTORS CORP.

Inspect the crankshaft sprocket keyway for wear.
Inspect the crankshaft sprocket oil pump drive splines for wear.

Fig 4: Inspecting Chain Dampener For Damage

Courtesy of GENERAL MOTORS CORP.

Inspect the chain dampener (232) for the following conditions:
- Loose metal inserts (1)
- Cracking (2) in the chain contact area
- Excessive grooves (3) in the chain contact area
  Grooves 1 mm (0.040 in) or less in depth are to be considered normal wear.