The exhaust manifold on the 3.0 liter engine 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.
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Most reported Nissan Pickup (D21) problems
I purchased my 1992 Nissan D21 truck in 1999 at 32,000 miles from the original owner. At that time the gas gauge was wandering. Also the anti-lock brake light was on. A few months later the gas gauge stopped working, but the low gas warning light still worked when gas got low in the tank. Then the temperature gauge stopped working. I took this car to several Nissan dealerships and they all said to replace the gas tank sending unit, which I tho...