XK (X150) V8-4.2L (2008)
Valve Clearance: Adjustments
Valve Clearance Adjustment
CAUTION: Rotating the crankshaft in a counterclockwise direction may cause engine damage. Crankshaft journals are directionally
machined. Rotating the crankshaft counterclockwise can raise burrs on bearing surfaces, reducing engine life.
CAUTION: Camshaft lobes must be 180 degrees away from each valve tappet or valve clearance will be incorrect.
1. Remove the cover and disconnect the battery ground cable.
Specifications
2. Check the valve clearances.
Valve Clearance Check
3. Rotate the engine clockwise to position the camshaft lobe away from the valve tappet.
4. Install the special tool 303-540, to the cylinder head.
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Tighten the 2 bolts to 10 Nm (7 lb.ft).