STS RWD V8-4.6L VIN A (2006)
Camshaft: Service and Repair
Setting Camshaft Timing
Setting Camshaft Timing
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Tools Required
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J 39946 Crankshaft Socket
Setting the camshaft timing is necessary whenever the camshaft drive system has been disturbed such that the alignment relationship between any
chain and sprocket has been lost.
The crankshaft and camshafts are correctly timed when the crank sprocket and the intermediate shaft sprocket have their timing marks aligned and all
4 camshaft position actuator timing marks are perpendicular (90°) to the cylinder head deck surface at the top of their rotation. The black timing chain
links are used for assembly purposes. Do not reference these black links to determine if the engine timing components are properly aligned. The black
links will only align with the actuator timing marks and the intermediate shaft sprocket, once every 126 revolutions. For this reason, it is not necessary
to have the black secondary chain links aligned with the timing marks when servicing only one of the secondary timing components. Proper alignment
is maintained by marking a chain link and sprocket gear tooth with a paint stick prior to disassembling individual components. When servicing
individual components, refer to the appropriate procedure.
1. Remove the following components for access to the timing chains:
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The left camshaft actuator housing.
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The right camshaft actuator housing.
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The engine front cover.
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The engine oil pump.
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The right secondary camshaft drive chain.
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The left secondary camshaft drive chain.
2. Important: The primary gears and chain must be properly timed prior to setting the left or right secondary camshaft timing.
Use the J 39946 (1) in order to rotate the crankshaft.
3. Using the J 39946, rotate the crankshaft until:
1. The primary timing gear alignment mark (1) is at the top of its position,
2. The crankshaft keyway (2) is approximately at the 1 o'clock position,
