QX56 RWD V8-5.6L (VK56DE) (2006)
Valve Spring: Specifications
Inspection After Disassembly
CYLINDER HEAD DISTORTION
1. Remove any oil, scale, gasket, sealant and carbon deposits from the cylinder head surface.
CAUTION: Do not allow any debris to enter the oil or coolant passages.
2. Measure the bottom surface of the cylinder head for distortion in six directions as shown, using suitable tools.
Standard: 0.03 mm (0.0012 inches)
Limit: 0.1 mm (0.004 inches)
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If measurement exceeds the limit, replace the cylinder head.
VALVE DIMENSIONS
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Check the dimensions of each valve. Refer to "VALVE DIMENSIONS".
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If the dimensions are out of the standard, replace the valve.
VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of the valve stem using suitable tool.
Standard
Intake: 5.965 - 5.980 mm (0.2348 - 0.2354 inches)
Exhaust: 5.955 - 5.970 mm (0.2344 - 0.2350 inches)
Valve Guide Inside Diameter
Measure the inside diameter of the valve guide using suitable tool.
Standard
Intake and Exhaust: 6.000 - 6.018 mm (0.2362 - 0.2369 inches)
Valve Guide Clearance
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(Valve guide clearance) = (Valve guide inside diameter) - (Valve stem diameter).
Valve guide clearance:
Standard