General Motors — Timing Chain and Camshaft Sprocket Removal
Repair & overhaul
From a General Motors service manual — check it applies to your exact model before use.
Procedure
- Check timing chain free play; replace chain if over 16 mm (5/8 inch).
- Remove bolts.
- Remove camshaft sprocket and timing chain together.
Specs & values
- Timing chain free play maximum: 16 mm (5/8 inch)
Source: General Motors service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.