Tapping Noise (Exhaust?)
 

I have developed a strange noise... almost a rattle.. from what I believe is
the under/passenger side of my 99 TJ. It doesn't happen all the time, seems
to happen mostly when it is warm and has been under a load (i.e. stop-n-go
traffic, highway driving, etc) for a while. The rattle is the loudest when
under load, i.e. when I take off from a stop sign or accelerate up a hill.
It has gotten louder lately. One day it was so bad, the "rattle" (sounds
like metal tapping metal, actually) was happening at idle. I got out, and
since I was in uniform and couldn't crawl under it, I just stuck my foot on
the tailpipe to see if that would stop it, and it seemed to.

I'm finally home, but can't get it to duplicate at a time when I can put it
up on stands and take a look at it. Every time I do, it won't duplicate. I
DID find a lot of green/white powdery stuff caked on the pipe between the
cat and the muffler. I've never seen that before. The pipe has a thick
coating of this junk from end to end of the pipe connecting the cat to the
muffler.

Any thoughts on this? It isn't one of those "it's a Jeep, it makes noise,
deal with it" situations. My wife thought the muffler was dragging
yesterday it got so bad.

By the way, I tapped, pulled, pushed, and prodded the exhaust from the
downpipe back. Nothing loose that I could see.

Eric
99 TJ SE

Re: Tapping Noise (Exhaust?)
 

check your convertor


"Eric" <gymrat@baileyscorner.com> wrote in message
news:XH3rc.4811$KO2.3327@fe2.texas.rr.com...
> I have developed a strange noise... almost a rattle.. from what I believe
is
> the under/passenger side of my 99 TJ. It doesn't happen all the time,
seems
> to happen mostly when it is warm and has been under a load (i.e. stop-n-go
> traffic, highway driving, etc) for a while. The rattle is the loudest
when
> under load, i.e. when I take off from a stop sign or accelerate up a hill.
> It has gotten louder lately. One day it was so bad, the "rattle" (sounds
> like metal tapping metal, actually) was happening at idle. I got out, and
> since I was in uniform and couldn't crawl under it, I just stuck my foot
on
> the tailpipe to see if that would stop it, and it seemed to.
>
> I'm finally home, but can't get it to duplicate at a time when I can put
it
> up on stands and take a look at it. Every time I do, it won't duplicate.
I
> DID find a lot of green/white powdery stuff caked on the pipe between the
> cat and the muffler. I've never seen that before. The pipe has a thick
> coating of this junk from end to end of the pipe connecting the cat to the
> muffler.
>
> Any thoughts on this? It isn't one of those "it's a Jeep, it makes noise,
> deal with it" situations. My wife thought the muffler was dragging
> yesterday it got so bad.
>
> By the way, I tapped, pulled, pushed, and prodded the exhaust from the
> downpipe back. Nothing loose that I could see.
>
> Eric
> 99 TJ SE
>
>

Re: Tapping Noise (Exhaust?)
 

check your convertor


"Eric" <gymrat@baileyscorner.com> wrote in message
news:XH3rc.4811$KO2.3327@fe2.texas.rr.com...
> I have developed a strange noise... almost a rattle.. from what I believe
is
> the under/passenger side of my 99 TJ. It doesn't happen all the time,
seems
> to happen mostly when it is warm and has been under a load (i.e. stop-n-go
> traffic, highway driving, etc) for a while. The rattle is the loudest
when
> under load, i.e. when I take off from a stop sign or accelerate up a hill.
> It has gotten louder lately. One day it was so bad, the "rattle" (sounds
> like metal tapping metal, actually) was happening at idle. I got out, and
> since I was in uniform and couldn't crawl under it, I just stuck my foot
on
> the tailpipe to see if that would stop it, and it seemed to.
>
> I'm finally home, but can't get it to duplicate at a time when I can put
it
> up on stands and take a look at it. Every time I do, it won't duplicate.
I
> DID find a lot of green/white powdery stuff caked on the pipe between the
> cat and the muffler. I've never seen that before. The pipe has a thick
> coating of this junk from end to end of the pipe connecting the cat to the
> muffler.
>
> Any thoughts on this? It isn't one of those "it's a Jeep, it makes noise,
> deal with it" situations. My wife thought the muffler was dragging
> yesterday it got so bad.
>
> By the way, I tapped, pulled, pushed, and prodded the exhaust from the
> downpipe back. Nothing loose that I could see.
>
> Eric
> 99 TJ SE
>
>

Re: Tapping Noise (Exhaust?)
 

check your convertor


"Eric" <gymrat@baileyscorner.com> wrote in message
news:XH3rc.4811$KO2.3327@fe2.texas.rr.com...
> I have developed a strange noise... almost a rattle.. from what I believe
is
> the under/passenger side of my 99 TJ. It doesn't happen all the time,
seems
> to happen mostly when it is warm and has been under a load (i.e. stop-n-go
> traffic, highway driving, etc) for a while. The rattle is the loudest
when
> under load, i.e. when I take off from a stop sign or accelerate up a hill.
> It has gotten louder lately. One day it was so bad, the "rattle" (sounds
> like metal tapping metal, actually) was happening at idle. I got out, and
> since I was in uniform and couldn't crawl under it, I just stuck my foot
on
> the tailpipe to see if that would stop it, and it seemed to.
>
> I'm finally home, but can't get it to duplicate at a time when I can put
it
> up on stands and take a look at it. Every time I do, it won't duplicate.
I
> DID find a lot of green/white powdery stuff caked on the pipe between the
> cat and the muffler. I've never seen that before. The pipe has a thick
> coating of this junk from end to end of the pipe connecting the cat to the
> muffler.
>
> Any thoughts on this? It isn't one of those "it's a Jeep, it makes noise,
> deal with it" situations. My wife thought the muffler was dragging
> yesterday it got so bad.
>
> By the way, I tapped, pulled, pushed, and prodded the exhaust from the
> downpipe back. Nothing loose that I could see.
>
> Eric
> 99 TJ SE
>
>

Re: Tapping Noise (Exhaust?)
 

check your convertor


"Eric" <gymrat@baileyscorner.com> wrote in message
news:XH3rc.4811$KO2.3327@fe2.texas.rr.com...
> I have developed a strange noise... almost a rattle.. from what I believe
is
> the under/passenger side of my 99 TJ. It doesn't happen all the time,
seems
> to happen mostly when it is warm and has been under a load (i.e. stop-n-go
> traffic, highway driving, etc) for a while. The rattle is the loudest
when
> under load, i.e. when I take off from a stop sign or accelerate up a hill.
> It has gotten louder lately. One day it was so bad, the "rattle" (sounds
> like metal tapping metal, actually) was happening at idle. I got out, and
> since I was in uniform and couldn't crawl under it, I just stuck my foot
on
> the tailpipe to see if that would stop it, and it seemed to.
>
> I'm finally home, but can't get it to duplicate at a time when I can put
it
> up on stands and take a look at it. Every time I do, it won't duplicate.
I
> DID find a lot of green/white powdery stuff caked on the pipe between the
> cat and the muffler. I've never seen that before. The pipe has a thick
> coating of this junk from end to end of the pipe connecting the cat to the
> muffler.
>
> Any thoughts on this? It isn't one of those "it's a Jeep, it makes noise,
> deal with it" situations. My wife thought the muffler was dragging
> yesterday it got so bad.
>
> By the way, I tapped, pulled, pushed, and prodded the exhaust from the
> downpipe back. Nothing loose that I could see.
>
> Eric
> 99 TJ SE
>
>

Re: Tapping Noise (Exhaust?)
 

>I have developed a strange noise... almost a rattle.. from what I believe
>is
>the under/passenger side of my 99 TJ

Sure sounds like your catalytic converter to me! The guts of it come loose and
rattle against the metal. Mine does that.

-jeff

Re: Tapping Noise (Exhaust?)
 

>I have developed a strange noise... almost a rattle.. from what I believe
>is
>the under/passenger side of my 99 TJ

Sure sounds like your catalytic converter to me! The guts of it come loose and
rattle against the metal. Mine does that.

-jeff

Re: Tapping Noise (Exhaust?)
 

>I have developed a strange noise... almost a rattle.. from what I believe
>is
>the under/passenger side of my 99 TJ

Sure sounds like your catalytic converter to me! The guts of it come loose and
rattle against the metal. Mine does that.

-jeff

Re: Tapping Noise (Exhaust?)
 

>I have developed a strange noise... almost a rattle.. from what I believe
>is
>the under/passenger side of my 99 TJ

Sure sounds like your catalytic converter to me! The guts of it come loose and
rattle against the metal. Mine does that.

-jeff

Re: Tapping Noise (Exhaust?)
 

On Thu, 20 May 2004 14:57:59 GMT, "Eric" <gymrat@baileyscorner.com>
wrote:

>I have developed a strange noise... almost a rattle.. from what I believe is
>the under/passenger side of my 99 TJ. It doesn't happen all the time, seems
>to happen mostly when it is warm and has been under a load (i.e. stop-n-go
>traffic, highway driving, etc) for a while. The rattle is the loudest when
>under load, i.e. when I take off from a stop sign or accelerate up a hill.
>It has gotten louder lately. One day it was so bad, the "rattle" (sounds
>like metal tapping metal, actually) was happening at idle. I got out, and
>since I was in uniform and couldn't crawl under it, I just stuck my foot on
>the tailpipe to see if that would stop it, and it seemed to.
>
>I'm finally home, but can't get it to duplicate at a time when I can put it
>up on stands and take a look at it. Every time I do, it won't duplicate. I
>DID find a lot of green/white powdery stuff caked on the pipe between the
>cat and the muffler. I've never seen that before. The pipe has a thick
>coating of this junk from end to end of the pipe connecting the cat to the
>muffler.
>
>Any thoughts on this? It isn't one of those "it's a Jeep, it makes noise,
>deal with it" situations. My wife thought the muffler was dragging
>yesterday it got so bad.
>
>By the way, I tapped, pulled, pushed, and prodded the exhaust from the
>downpipe back. Nothing loose that I could see.
>
>Eric
>99 TJ SE
>
Ditto on the cat comments I have had a few go like that.... change it
before it plugs right up or causes excessive back pressure on your
engine. The first one that went on me rattled for a few months then it
decided to break up and jam into the cat outlet nozzle and drop my
forward momentum to a crawl, I actually went out and drilled a 5/8"
hole in the front of the converter to allow me to drive to the muffler
shop.