Nissan/Datsun 200SX/510/610/710/810/Maxima 1973-1984 Repair Guide

Valve Seats



Check the valve seat inserts for any evidence of pitting or excessive wear at the valve contact surface. The valve seats in all engines covered here can be replaced. Because the cylinder head must be machined to accept the new seat inserts, consult an engine specialist or machinist about this work.

When repairing a valve seat, first check the valve and guide; if wear is evident here, replace the valve and/or guide, then correct the valve seat.