QX56 V8-5.6L (VK56DE) (2004)
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Measure the following parts if outside the specified value.
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Dimension A for camshaft No.1 journal
Standard : 30.500 - 30.548 mm (1.2008 - 1.2027 inch)
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Dimension B for cylinder head No.1 journal
Standard : 30.360 - 30.385 mm (1.1953 - 1.1963 inch)
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Refer to the standards above, and then replace camshaft and/or cylinder head if standards are exceeded.
Camshaft Sprocket Runout
1. Install camshaft in cylinder head.
2. Install camshaft sprocket to camshaft.
3. Measure camshaft sprocket runout.
Runout : Less than 0.15 mm (0.0059 inch)
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If it exceeds the specification, replace camshaft sprocket.
Valve Lifter
Check if surface of valve lifter has any wear or cracks.
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If any damage is found, replace valve lifter.
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Select the thickness of the head so that valve clearance is the standard when replacing.
Valve Lifter Clearance
Valve Lifter Diameter