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Next: 10k maintenance for RX330
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External
Since: Mar 05, 2005
Posts: 16
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(Msg. 1) Posted: Mon Jul 18, 2005 6:55 pm
Post subject: Altima startup tap, revisited again
Archived from groups: alt>autos>nissan (more info?)
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Ok, so I've been able to do some testing and the metallic tapping on startup
in my 99 Altima definitely seems to be coming from the exhaust side of the
engine, about halfway down. Somewhere in the general area of the O2 sensor.
It seems to be worst when started cold on warm summer mornings.
I'm thinking the only way to get it looked at is going to mean leaving it
somewhere overnight, but before I do that, is anyone willing to suggest if
this type of sound could be caused by anything else in this area but a valve
out of adjustment? I haven't been able to hear it by listening over the
valve cover, but with all the other sounds under the hood it's hard to
pinpoint where any one sound is coming from.
It's a fairly light, unmasked metallic rapping noise so I'm hoping it's not
something too serious. I had the oil changed last week with no change in
the symptoms. |
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External
Since: Apr 15, 2004
Posts: 71
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(Msg. 2) Posted: Mon Jul 18, 2005 9:24 pm
Post subject: Re: Altima startup tap, revisited again [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Mon, 18 Jul 2005 21:17:57 GMT, "JM" <jmsn.TakeThisOut@ns.sympatico.ca> wrote:
>>Ok, so I've been able to do some testing and the metallic tapping on startup
>>in my 99 Altima definitely seems to be coming from the exhaust side of the
>>engine, about halfway down. Somewhere in the general area of the O2 sensor.
>>It seems to be worst when started cold on warm summer mornings.
>>I'm thinking the only way to get it looked at is going to mean leaving it
>>somewhere overnight, but before I do that, is anyone willing to suggest if
>>this type of sound could be caused by anything else in this area but a valve
>>out of adjustment? I haven't been able to hear it by listening over the
>>valve cover, but with all the other sounds under the hood it's hard to
>>pinpoint where any one sound is coming from.
>>It's a fairly light, unmasked metallic rapping noise so I'm hoping it's not
>>something too serious. I had the oil changed last week with no change in
>>the symptoms.
How many KMs on it, and is it burning any oil? |
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External
Since: May 13, 2004
Posts: 113
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(Msg. 3) Posted: Mon Jul 18, 2005 11:55 pm
Post subject: Re: Altima startup tap, revisited again [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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JM wrote:
> Ok, so I've been able to do some testing and the metallic tapping on
> startup in my 99 Altima definitely seems to be coming from the
> exhaust side of the engine, about halfway down. Somewhere in the
> general area of the O2 sensor. It seems to be worst when started cold
> on warm summer mornings.
> I'm thinking the only way to get it looked at is going to mean
> leaving it somewhere overnight, but before I do that, is anyone
> willing to suggest if this type of sound could be caused by anything
> else in this area but a valve out of adjustment? I haven't been able
> to hear it by listening over the valve cover, but with all the other
> sounds under the hood it's hard to pinpoint where any one sound is
> coming from.
> It's a fairly light, unmasked metallic rapping noise so I'm hoping
> it's not something too serious. I had the oil changed last week with
> no change in the symptoms.
Sounds like it might be the timing chain. If so, it's not much to worry
about. >> Stay informed about: Altima startup tap, revisited again |
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External
Since: Apr 25, 2005
Posts: 6
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(Msg. 4) Posted: Tue Jul 19, 2005 7:26 am
Post subject: Re: Altima startup tap, revisited again [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On 7/18/2005 5:17 PM US(ET), JM took fingers to keys, and typed the
following:
>Ok, so I've been able to do some testing and the metallic tapping on startup
>in my 99 Altima definitely seems to be coming from the exhaust side of the
>engine, about halfway down. Somewhere in the general area of the O2 sensor.
>It seems to be worst when started cold on warm summer mornings.
>I'm thinking the only way to get it looked at is going to mean leaving it
>somewhere overnight, but before I do that, is anyone willing to suggest if
>this type of sound could be caused by anything else in this area but a valve
>out of adjustment? I haven't been able to hear it by listening over the
>valve cover, but with all the other sounds under the hood it's hard to
>pinpoint where any one sound is coming from.
>It's a fairly light, unmasked metallic rapping noise so I'm hoping it's not
>something too serious. I had the oil changed last week with no change in
>the symptoms.
>
>
>
>
Check all the heat shields on the exhaust system. One or more brackets
may have rusted off causing the loose shield to rattle when first starting.
--
Bill >> Stay informed about: Altima startup tap, revisited again |
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External
Since: Mar 05, 2005
Posts: 16
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(Msg. 5) Posted: Tue Jul 19, 2005 8:55 pm
Post subject: Re: Altima startup tap, revisited again [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Brad Clarke" <me.RemoveThis@privacy.net> wrote in message
news:1glod1pnr011euabrbcg8bcvpidh7bnunf@4ax.com...
> How many KMs on it, and is it burning any oil?
Sorry, meant to mention that -- it's got 94,000 km and hasn't been burning
any oil that I've noticed. >> Stay informed about: Altima startup tap, revisited again |
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External
Since: Mar 05, 2005
Posts: 16
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(Msg. 6) Posted: Tue Jul 19, 2005 8:55 pm
Post subject: Re: Altima startup tap, revisited again [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"FanJet" wrote in message
news:<43_Ce.2494$Q75.479578@newshog.newsread.com>...
> Sounds like it might be the timing chain. If so, it's not much to worry
> about.
That was the only thing aside from valves that I could think of... but it
sounds like it's coming more from the exhaust side of the engine rather than
from over around the timing chain, although I guess depending on what the
chain was hitting it could sound like it was coming from any number of
places.
This tapping is quite well defined though, I would expect the chain to make
sort of a threshing sound, and the sound I get is a clean tap tap tap...
probably at a rate of 4 or 5 a second for 2 or 3 seconds.
Maybe I'll get a mic out there some morning and post a link to a recording
of the sound. >> Stay informed about: Altima startup tap, revisited again |
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External
Since: Mar 05, 2005
Posts: 16
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(Msg. 7) Posted: Tue Jul 19, 2005 8:55 pm
Post subject: Re: Altima startup tap, revisited again [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"willshak" <willshak.TakeThisOut@oohvc.rr.com> wrote in message
news:11dporooncnrk64@news.supernews.com...
> Check all the heat shields on the exhaust system. One or more brackets
> may have rusted off causing the loose shield to rattle when first
starting.
I checked the exhaust out and couldn't find anything loose, and nothing
rattles if I give the downpipe a good smack with my fist from under the car.
I'm pretty sure it's an internal thing because (and I meant to mention this
originally) if I pull the fuel pump fuse and crank the starter until the oil
pressure light goes out, and then start the car, there's no sign of the
tapping.
Thanks for the replies. >> Stay informed about: Altima startup tap, revisited again |
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External
Since: Dec 17, 2004
Posts: 11
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(Msg. 8) Posted: Wed Jul 20, 2005 10:55 am
Post subject: Re: Altima startup tap, revisited again [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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almost sounds like a problem 80's pathfinders have where the exhaust studs
broke off inside the head, making a rattle sound on cold startup and going
away when warm
"JM" <jmsn RemoveThis @ns.sympatico.ca> wrote in message
news:LKgDe.62994$Ph4.1934787@ursa-nb00s0.nbnet.nb.ca...
> "willshak" <willshak RemoveThis @oohvc.rr.com> wrote in message
> news:11dporooncnrk64@news.supernews.com...
> > Check all the heat shields on the exhaust system. One or more brackets
> > may have rusted off causing the loose shield to rattle when first
> starting.
>
> I checked the exhaust out and couldn't find anything loose, and nothing
> rattles if I give the downpipe a good smack with my fist from under the
car.
>
> I'm pretty sure it's an internal thing because (and I meant to mention
this
> originally) if I pull the fuel pump fuse and crank the starter until the
oil
> pressure light goes out, and then start the car, there's no sign of the
> tapping.
>
> Thanks for the replies.
>
> >> Stay informed about: Altima startup tap, revisited again |
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External
Since: Jan 30, 2004
Posts: 23
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(Msg. 9) Posted: Fri Aug 05, 2005 10:49 am
Post subject: Re: Altima startup tap, revisited again [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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JM wrote:
> "willshak" <willshak.TakeThisOut@oohvc.rr.com> wrote in message
> news:11dporooncnrk64@news.supernews.com...
>
>>Check all the heat shields on the exhaust system. One or more brackets
>>may have rusted off causing the loose shield to rattle when first
>
> starting.
>
> I checked the exhaust out and couldn't find anything loose, and nothing
> rattles if I give the downpipe a good smack with my fist from under the car.
>
> I'm pretty sure it's an internal thing because (and I meant to mention this
> originally) if I pull the fuel pump fuse and crank the starter until the oil
> pressure light goes out, and then start the car, there's no sign of the
> tapping.
>
> Thanks for the replies.
>
>
What type of oil filter are you using? Purolator PureONE?
CD >> Stay informed about: Altima startup tap, revisited again |
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External
Since: Mar 05, 2005
Posts: 16
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(Msg. 10) Posted: Sat Aug 06, 2005 8:55 am
Post subject: Re: Altima startup tap, revisited again [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Nope, it's only ever had real Nissan filters from the dealer since I've had
it. They're white with red writing, for some reason unlike the blue on blue
ones they installed on my 94.
"Codifus" <codifus.RemoveThis@optonline.net> wrote in message
news:Y%KIe.25262$Kx6.11435@fe12.lga...
> JM wrote:
> > "willshak" <willshak.RemoveThis@oohvc.rr.com> wrote in message
> > news:11dporooncnrk64@news.supernews.com...
> >
> >>Check all the heat shields on the exhaust system. One or more brackets
> >>may have rusted off causing the loose shield to rattle when first
> >
> > starting.
> >
> > I checked the exhaust out and couldn't find anything loose, and nothing
> > rattles if I give the downpipe a good smack with my fist from under the
car.
> >
> > I'm pretty sure it's an internal thing because (and I meant to mention
this
> > originally) if I pull the fuel pump fuse and crank the starter until the
oil
> > pressure light goes out, and then start the car, there's no sign of the
> > tapping.
> >
> > Thanks for the replies.
> >
> >
> What type of oil filter are you using? Purolator PureONE?
>
> CD >> Stay informed about: Altima startup tap, revisited again |
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