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2.2 - Valve Clearances ( Paul Stow,  December 1, 2001 )

Remove the cam cover as described a bove.

Each valve must be checking using a feeler gauge inserted between the back of the cam lobe and actuating bucket, when the lobe itself is pointing vertically upward. The engine can be turned in a clockwise direction using a socket on the crankshaft pulley bolt, and this can be made easier by removing the spark plugs first.

Adjustment is beyond the scope of many home technicians, as it requires removal of the camshafts and the insertion or removal of shims under the the actuators. The basic process is similar to that used on the XJ40 and described in the Haynes manual. Minor differences from specification are not a major cause for concern, but an undersize gap on an exhaust valve is likely to cause that valve to overheat and burn out.

Replace the cam cover as described above, checking the condition of the gasket and plug hole seals.


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