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milling machine
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Dec 20, 2009, 11:50 AM
Post #1 of 14
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I have a 2000 nissan maxima air, automatic, v-6, 3000 twin cam 24 valve engine. It has a whining noise near I would say were the timing chain tensioner is located. I have disconnected all the belts so it is not the rubber drive belt tensioner, or the power steering pump or the altenator or the compressor. The whining noise seems to get louder as the RPM's increase. This car has a timing chain and a timing chain driven water pump. Any ideas would be appreciated.
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Hammer Time
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Dec 20, 2009, 12:16 PM
Post #2 of 14
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Re: whining noise
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If the noise is still there with all the belts removed, then your most likely looking at a bad water pump. That is the only component in there that has a bearing.
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milling machine
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Dec 20, 2009, 12:29 PM
Post #3 of 14
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Re: whining noise
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But wouldn't a warn out tensioner make a wizzing noise, it sounds closer to the tensioner than the pump.
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Hammer Time
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Dec 20, 2009, 12:58 PM
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Re: whining noise
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There are no pulleys on the tensioner. It's just a nylon rubbing block. If the nylon came apart, the chain would be rattling all over the place.
Your not going to know for sure what it is until you take it apart anyway.
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milling machine
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Dec 20, 2009, 1:27 PM
Post #5 of 14
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Re: whining noise
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I bought the water pump for it and will change it out. And I will look at the tensioner to see if it has worn thru. This engine has three tensioners. Have you ever seen a tensioner that has worn thru and the timing chain was just touching bare metal and making a whining sound ?
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Hammer Time
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Dec 20, 2009, 1:58 PM
Post #6 of 14
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Re: whining noise
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Sure, but it won't be a whining sound. It will be a loud rattle.
You shouldn't be buying anything yet. You still have no idea what the problem is and won't until you take it apart.
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milling machine
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Dec 20, 2009, 2:17 PM
Post #7 of 14
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Re: whining noise
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Thanks for the response, I will change the water pump because I already have it now and let you know if that was the problem.
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Hammer Time
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Dec 20, 2009, 2:23 PM
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Re: whining noise
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I hope you realize what your getting yourself into there. This job calls for 13 hours of flat rate and one mistake can cost you a couple thousand in bent valves. This is no car to learn on.
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milling machine
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Dec 20, 2009, 4:02 PM
Post #9 of 14
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Re: whining noise
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I have the factory service manual and it seems the hard part is hoping the chain does not skip a tooth or two when you release the chain tensioner and then turn the crankshaft counterclockwise 20 degrees to take out the old pump and put in the new one. But this is how they say to do the job. I know how easy it is to skip a tooth on a timing chain, I changed a chain on a toyota truck a few times, and when you loosen the tensioner the weight of the loose chain sometimes makes the camshaft move. But I think your right about it being the pump, it has 130,000 miles on it and most likely the bearing tolerances have opened up and small amounts of coolant are seeping in there causing the whining noise. Thanks again.
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Hammer Time
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Dec 20, 2009, 4:42 PM
Post #10 of 14
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Re: whining noise
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The water pump without the timing chain is much easier. It's replacing the timing chain that is real hard.
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poonamt93
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Dec 20, 2009, 11:54 PM
Post #11 of 14
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Re: whining noise
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Could be anything, belts, alternator, water pump, etc...in my case it was my alternator, after I got that changed, the noise went away.
(No ad links please)
(This post was edited by Tom Greenleaf on Dec 21, 2009, 2:19 AM)
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Hammer Time
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Dec 21, 2009, 3:21 AM
Post #12 of 14
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Re: whining noise
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Could be anything, belts, alternator, water pump, etc...in my case it was my alternator, after I got that changed, the noise went away.
If you had read the thread first before being in a hurry to get your advertising in, you would have read that he removed all the belts and the noise was still there.
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milling machine
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Jan 12, 2010, 6:19 PM
Post #13 of 14
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Re: whining noise
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The problem turned out to be a bad compressor clutch, the noise is now gone. Somehow I thought the noise was still there with all the belts off, that threw me off. Oh well, it is fixed now thanks for the help.
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Sidom
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Jan 12, 2010, 9:02 PM
Post #14 of 14
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Re: whining noise
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Well glad you finally got it tracked down & fixed..........
Thx 4 taking the time to let us know the final outcome
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