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Infiniti
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1993
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J30 V6-181 3.0L
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Engine
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Cylinder Head Assembly
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Valve Spring
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Testing and Inspection
Valve Spring: Testing and Inspection
1.
Check for
valve spring
squareness, out of square limit is 0.079 inches.
2.
Check valve spring pressure at a height of 1.0846 inches, if greater than 96.2 lbs., replace spring.