#1
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Rattle Noise on cold start up
Noise is pretty loud then immediatley quiets after about 30 seconds...doesn't sound like valve tappet, or chain noise....would worn belts cause this....2005 3.5L with 97,000 miles
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#2
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How's your oil level? If it's lower than you thought, look for the grim reaper in your rearview mirror...
Pre-Cat Engine Killer...things I should have noticed and even if your oil is up...watch out for this one Nissan Techs - Need Your Input on This (Altima VQ Cam-Chain/Tensioner) |
#3
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Oil level is good.....always topped off
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#4
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Mac1,
after reading your thread, my car exhibits none of the symptons your describing. I had a Caddy that made the same noise, and turned out to be a bad serpentine belt....there is no smell, no smoke, no burning oil, no hesitation, starts fine, runs great. Might even be pully noise, thing is it doesn't last that long and doesn't continue when engine is warm and while running. You can hardly hear the engine running at idle. |
#5
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"there is no smell, no smoke, no [visibly] burning oil, no hesitation, starts fine, runs great" -- and I still needed a new engine, but glad to hear your oil is good etc.
Now, I tend to agree, it's probably a bearing somewhere most likely water pump or power steering. |
#6
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Check this thread to for the VTC rattle
Nissan Altima Engine Rattle - CarSpace Automotive Forums some similar issues http://maxima.theowensfamily.com/tsb/ntb03-060.pdf |
#7
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Also check the type of oil filter you now have installed. If it's an aftermarket try a nissan or pureolator gold and check the results.
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#8
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Good idea ... Tech22, what do you think of the NAPA Gold (same as high end "Wix") oil filter as another option? Purolator Gold was one I also had my eyes on. Probably can't go wrong with the Nissan oil filter.
Last edited by Altima SSS; 02-11-2009 at 04:51 PM. |
#9
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Altimas are known for doing this. There is a valve in the intake area that makes this noise when the engine is cold. Mine does the same thing. There is a tech tipsheet about this, which i have at home on how to fix this. It includes taking the valve out and using a type of epoxy to secure it.
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#10
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BELTS!!!
Here is a good one,,,talked to a local mech. he said spray some water on the belts during start up....if the sound immediatley changes,,,its belts...guess what noise stopped right away....he says they can sound like metal rattle becuase of the way they wear....
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#11
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Quote:
have u just recently noticed this noise? have u changed or done something, and then the noise came. i think im gonna try tech22 idea and get an oem flter cause i heard from a few techs here state this, it may be an issue with some noise im started getting
__________________
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#12
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Geez
Ok, so why when you saturate the belt area with a little water, the sound changes and immediatley goes away. I've read several threads from other sites talking about belt chattering, sounding like rubbing metal, rattle noise. Like I said before I had the same noise from my Caddy, I swore it was a bearing or lifter, once the serpentine belt was changed, the noise never came back.....anyone here got a take on that. By the way, since I'm new to the site I need some verification, is pre-cat mean pre catasrophic failure? or something else? I'm going to have both belts changed and see what happens.
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#13
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pre-cat is short for pre-catalytic converter.
Our engines have three catalytic converters. Two are integrated directly into the exhaust headers, and a third main cat roughly under the shift lever. The pre-cats heat quickly and take care of cold engine emissions. nissan pre-cat failure picture - Google Image Search |
#14
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I have exactly same noise problem described here in my Maxima 04. It started a few weeks ago. When I start the car the noise is pretty loud, but once warm it decreases. However, when I press accelaration the noise comes back again...Only after driving for about 20 min it completely goes away. Is it a belt???? sounds like a noise created by a metal or smth....please Advise!!!!!
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#15
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Check the heat shields on the cats.Hot and cold.
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cold, noise, rattle, start |
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