Question about 1997 Nissan Pickup

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Engine has a loud knocking nouse from cold - 1997 Nissan Pickup

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Let's see. If the loud knock is more like a rattle, then you arn't getting oil to your valves. Rather than this being the pump's fault, the most common answer to this problem is that the oil is burnt, or you are low on oil. If the "cold" means when the engine is cold, then this is certainly the cas. As you wrote this on August 2nd, I seriously doubt that you mean "cold weather".

If you mean that it does it when you are running down the road, or under some other condition, the noise might be from the transmission, your blown stereo, or the dead cat tangled in your radiator fan. I am afraid that 1/2 a sentence will not give us much to diagnose your problem with. Perhaps spend a few minutes or hours (whatever it takes) and write a decently readable sentence (or ever TWO) and you might get more specific help.

Posted on Aug 30, 2008

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If it only does it cold you may have a bad oil pump because oil is thicker cold.

Posted on Aug 02, 2008

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