G35 Sedan 2WD V6-3.5L (VQ35DE) (2005)
Valve Spring: Specifications
Inspection After Disassembly
VALVE DIMENSIONS
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Check dimensions of each valve. For dimensions, refer to "Valve Dimensions".
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If dimensions are out of the standard, replace valve.
VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of valve stem with micrometer.
Standard
Intake: 5.965 - 5.980 mm (0.2348 - 0.2354 inch)
Exhaust: 5.955 - 5.970 mm (0.2344 - 0.2350 inch)
Valve Guide Inner Diameter
Measure the inner diameter of valve guide with bore gauge.
Standard
Intake and Exhaust: 6.000 - 6.018 mm (0.2362 - 0.2369 inch)
Valve Guide Clearance
(Valve guide clearance) = (Valve guide inner diameter) - (Valve stem diameter).
Valve guide clearance:
Standard
Intake: 0.020 - 0.053 mm (0.0008 - 0.0021 inch)
Exhaust: 0.030 - 0.063 mm (0.0012 - 0.0025 inch)
Limit
Intake: 0.08 mm (0.003 inch)
Exhaust: 0.09 mm (0.004 inch)
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If it exceeds the limit, replace valve and/or valve guide.
VALVE GUIDE REPLACEMENT
When valve Guide is removed. replace with oversized [0.2 mm (0.008 inch)] valve Guide.