XK (X150) V8-4.2L SC (2007)
5. CAUTION: Do not rotate the crankshaft while the special tool 303-540/02 is attached to 303-540.
Attach the special tool 303-540/02 to 303-540.
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Secure with the 2 wing nuts.
6. Position the special tool to the tappet as shown.
7. Using the special tool, compress the valve spring.
8. CAUTION: Do not use a magnet to remove shims. Failure to follow these instructions may result in damage to the vehicle.
NOTE: Use the following formula to calculate the required shim thickness. Original shim thickness + measured shim clearance - desired clearance
= required shim thickness.
Remove, clean and measure the shim.
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Surround the immediate working area with a cloth, to retain any loose shims displaced by the compressed air.
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Use the special tool 303-590, aimed at the edge of the shim, to lift it from the tappet. Note the position of each one.