A coolant leak may develop from a plug on the front of the rear cylinder head, behind the timing cover.
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Repairpal verified 1996 Nissan Quest problems
The distributor shaft bearing can become rusty, and seize causing the engine to stall or not start. The failed distributor will commonly require replacement.
The exhaust manifold often warps and cracks, breaking off the studs between the cylinder head and the exhaust manifold. The noise may be most noticeable when the engine is cold.