300ZX Coupe V6-2960cc DOHC (VG30DE) (1994)
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Measure clearance between seal ring and ring groove.
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Standard clearance:
0.10-0.25 mm (0.0039 - 0.0098 in)
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Wear limit:
0.25 mm (0.0098 in)
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If not within wear limit, replace oil pump cover assembly.