Cylinder Head: Inspection

WARNING: This page is about a different car, the 1988 Nissan 300ZX. However, it is still accessible from the selected car via links, so may be relevant.

Check cylinder head for cracks, flaws or damage. Inspect cylinder head and block mating surfaces for warpage. Warpage limit is .004" (.10 mm). If beyond limit, resurface head. Maximum surface grinding limit of head and/or block is .008" (.20 mm). Replace head and/or block if machined or warped beyond service limit.

NOTE: Cylinder head bolts 4, 5, 12 and 13 are longer than other head bolts. See Figure.