Nissan: Timing chain noise, advice please!

JM, It's common for the 94' Altima to have timing chain noise. Do you know
if the lower guide was replaced with the updated part when the upper guides
where removed. AT 170k I say it's time for new timing chains, guides, and
tensioner, before it does any more damage. It won't be cheap thou.
"JM" <ns.sympatico.ca> wrote in message
news:ALhPb.68686$nbnet.nb.ca... 
happens 
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brystok wrote:
 

Yep sounds like it's chain time to me too.
--

Steve

http://www.atlantaracing.com

Ok. I think I'll go to the other dealer in town and see what they think. I
don't mind getting it done, it might sting a bit but it's the only way to be
sure it's taken care of.

I was under the hood again tonight, trying to nail down where the various
sounds are coming from, and I think the rotation sound I mentioned second in
my original post is actually coming from something outside of the engine.
It sounds like it might be the alternator or something in that area. It's
hard to hear it at idle, but if I rev it up, for a moment I can hear the
sound before the revs come up to where I have the throttle. I can't hear
the sound at all when I'm listening directly over the valve cover. I wonder
if a hose or screwdriver held up against a few of the things on the
serpentine belt would be able to identify the source. One thing I forgot to
mention was that although the sound is worse when cold, it seems more
related to the air temperature than the engine temperature. During the cold
days last week, even after the engine was fully warmed up, the sound was
much more noticeable than it is this week, in warmer weather. So that to me
would indicate it may be something external to the engine.

I'll post my findings as they come in.

"Steve" <com> wrote in message
news:bul3m5$is15f$news.uni-berlin.de... 
know 

As for using a screwdriver or hose to locate the source - about 30 years ago
I bought a mechanics stethoscope - like doctors use - except it has about a
ten inch metal rod on the end for listening to engine noises. I can put it
on an alternator, water pump, etc., and get a pretty good idea of where a
noise is coming from. However, it is VERY loud if you bump it against
anything when you have the ear pieces in your ears. I don't know if they
still make them or not, but it was cheap and has lasted a long time.


"JM" <ns.sympatico.ca> wrote in message
news:JXCPb.69851$nbnet.nb.ca... 
I 
be 
in 
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me 
cheap 

I just saw one of these today, beleive it or not! I think I'll pick one up
tomorrow, they were only $20 or so. Unfortunately the area I'm listening in
is right around the belts so I'll have to be careful to not get the tube
snagged anywhere!

"Orv" <Net> wrote in message
news:Ro3Qb.16029$.. 
ago 
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it 
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you 

JM wrote:
 

A screwdriver works great, never heard of using a hose..

Something else you can try, remove the belts and crank it up. If the noise
is still there, it's inside the engine.

--

Stacey