QX56 AWD V8-5.6L (VK56DE) (2005)
1. Install the camshaft in the cylinder head.
2. Install the camshaft sprocket to the camshaft.
3. Measure the camshaft sprocket runout.
Runout: Less than 0.15 mm (0.0059 inches)
^
If measurement exceeds the specification, replace the camshaft sprocket.
Valve Lifter
Check if the surface of the valve lifter has any wear or cracks.
^
If any damage is found, replace the valve lifter.
^
Select the thickness of the head so that the valve clearance is within the standard when replacing. Refer to "Valve Clearance".
Valve Lifter Clearance
Valve Lifter Diameter
^
Measure the diameter of the valve lifter.
Standard: 33.977 - 33.987 mm (1.3377 - 1.3381 inches)
Valve Lifter Hole Diameter
^
Measure the diameter of the valve lifter hole of the cylinder head, using suitable tool.
Standard: 34.000 - 34.016 mm (1.3386 - 1.3392 inches)
Calculation of Valve Lifter Clearance
(Valve lifter clearance) = (valve lifter hole diameter) - (valve lifter diameter)
Standard 0.013 - 0.039 mm (0.0005 - 0.0015 inches)
^
If the measurement is not within specification, referring to each specification of the valve lifter diameter and hole diameter, replace either or both