Envoy 2WD V8-5.3L (2007)
Timing Chain: Service and Repair
Timing Chain and Sprockets Replacement
Tools Required
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J 8433-1 Puller Bar
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J 41478 Crankshaft Front Oil Seal Installer
^
J 41558 Crankshaft Sprocket Remover
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J 41665 Crankshaft Balancer and Sprocket Installer
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J 41816-2 Crankshaft End Protector
Removal Procedure
1. Remove the oil pump. Refer to Oil Pump, Screen, and Crankshaft Oil Deflector Replacement.
Notice: Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the
valves.
2. Rotate the crankshaft until the timing marks on the crankshaft and the camshaft sprockets are aligned.
Notice: Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the
valves.
3. Remove and discard the camshaft sprocket bolt (206).
4. Remove the camshaft sprocket (205) and timing chain (208).
