2001 Nissan Altima squeal noise when starting

I am having the SAME issue with my 1999 Nissan Atima GXE 2.4L (Standard) w/147,000mi. It seems to be most noticeable when the engine is cold. It's an odd mid-tone metal to metal squeel just when the engine is turning over. Any info on the subject would be GREATLY appreciated. Thanks Rich

I had just this problem on my 1995 Nissan Presea CT2 1800cc. I thought it was just a belt issue, but in fact insufficient lubrication to one camshaft was causing serious wear on the cam lobes, hence the noise. According to the mechanic this problem is very common on several Nissan models, i.E. It is a design flaw in the cam lubrication system. I needed a new camshaft, lifters, engine flushed, and replacement with semi-synthetic oil.

It is a 5 minute job to remove the valve cover and check the camshaft. I strongly recommend that you do this immediately.

If the problem is not the cam then could be your water pump. Thats the only thing that I can think of; it sounds like your holding a few ballbearings and shake your hand and the rattling you would hear is the best I can describe it. A good mech. Might be able to tell you if he could hear you start it up. GOOD LUCK. MARK