M45x AWD V8-4.5L (VK45DE) (2008)
Valve Clearance: Testing and Inspection
INSPECTION
In cases of removing/installing or replacing camshaft and valve-related parts, or of unusual engine conditions due to changes in valve clearance (found
malfunctions during starting, idling or causing noise), perform inspection as follows:
1. Remove rocker covers (right bank and left bank).
2. Measure the valve clearance as follows:
a. Set No. 1 cylinder at TDC of its compression stroke.
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Rotate crankshaft pulley in clockwise to align TDC identification notch (without paint mark) with timing indicator on front cover.
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Check that both intake and exhaust cam noses of No. 1 cylinder (engine front side of left bank) are located as shown in the figure.
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If not, turn crankshaft one revolution (360 degrees) and align as shown in the figure.
b. Use feeler gauge, measure the clearance between valve lifter and camshaft.
Valve clearance