XJ (X350) V8-4.2L (2005)
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6. Lower the vehicle.
7. Remove the right-hand variable camshaft timing oil control unit housing.
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Remove and discard the O-ring seals.
8. Install the special tool to the left-hand cylinder head.
9. Install the special tool to the right-hand cylinder head.
10. Remove the primary timing chain tensioner assembly.
11. Remove the primary timing chain tensioner guide.
