Re: Rattle in my Cat. '98 TJ
 

The one on our 88 rattled when we first got it about 10 years ago. Then
it stopped. The jeep has passed all the emissions to date. I just had
to take the cat off due to a leak and it was a hollow can with nothing
inside.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

billy ray wrote:
>
> The converter on my K car rattled for probably 60-80 thousand miles while
> all the time passing the pollution tests. It did quiet down quite a bit
> when the heat shield finally 'fell' off with assistance..
>
> "RoyJ" <spamless@microsoft.net> wrote in message
> news:BDbRg.5135$UG4.297@newsread2.news.pas.earthli nk.net...
> > It's usually the heat shield on the converter or the ceramic substrate
> > inside the conveter. The heat shield can be removed but it's there to keep
> > the floor pan from getting too hot and the grass you parked on from
> > catching on fire. Sounds like you could let it go for a while but
> > eventually it's replacement time.
> >
> > GTK wrote:
> >> '98 TJ 4.0L Manual
> >>
> >> I've got an annoying rattle in my Cat converter at idle speed. Thought
> >> at first it might be the headers. But with engine off, I can go down
> >> under and bang on the Cat and clearly hear the rattle inside. Is the Cat
> >> toast? OBCII finds no codes. Just had emissions inspection 2 months ago
> >> so won't be rechecking for a while. Any recommendations?

Re: Rattle in my Cat. '98 TJ
 

The one on our 88 rattled when we first got it about 10 years ago. Then
it stopped. The jeep has passed all the emissions to date. I just had
to take the cat off due to a leak and it was a hollow can with nothing
inside.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

billy ray wrote:
>
> The converter on my K car rattled for probably 60-80 thousand miles while
> all the time passing the pollution tests. It did quiet down quite a bit
> when the heat shield finally 'fell' off with assistance..
>
> "RoyJ" <spamless@microsoft.net> wrote in message
> news:BDbRg.5135$UG4.297@newsread2.news.pas.earthli nk.net...
> > It's usually the heat shield on the converter or the ceramic substrate
> > inside the conveter. The heat shield can be removed but it's there to keep
> > the floor pan from getting too hot and the grass you parked on from
> > catching on fire. Sounds like you could let it go for a while but
> > eventually it's replacement time.
> >
> > GTK wrote:
> >> '98 TJ 4.0L Manual
> >>
> >> I've got an annoying rattle in my Cat converter at idle speed. Thought
> >> at first it might be the headers. But with engine off, I can go down
> >> under and bang on the Cat and clearly hear the rattle inside. Is the Cat
> >> toast? OBCII finds no codes. Just had emissions inspection 2 months ago
> >> so won't be rechecking for a while. Any recommendations?

Re: Rattle in my Cat. '98 TJ
 

The one on our 88 rattled when we first got it about 10 years ago. Then
it stopped. The jeep has passed all the emissions to date. I just had
to take the cat off due to a leak and it was a hollow can with nothing
inside.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

billy ray wrote:
>
> The converter on my K car rattled for probably 60-80 thousand miles while
> all the time passing the pollution tests. It did quiet down quite a bit
> when the heat shield finally 'fell' off with assistance..
>
> "RoyJ" <spamless@microsoft.net> wrote in message
> news:BDbRg.5135$UG4.297@newsread2.news.pas.earthli nk.net...
> > It's usually the heat shield on the converter or the ceramic substrate
> > inside the conveter. The heat shield can be removed but it's there to keep
> > the floor pan from getting too hot and the grass you parked on from
> > catching on fire. Sounds like you could let it go for a while but
> > eventually it's replacement time.
> >
> > GTK wrote:
> >> '98 TJ 4.0L Manual
> >>
> >> I've got an annoying rattle in my Cat converter at idle speed. Thought
> >> at first it might be the headers. But with engine off, I can go down
> >> under and bang on the Cat and clearly hear the rattle inside. Is the Cat
> >> toast? OBCII finds no codes. Just had emissions inspection 2 months ago
> >> so won't be rechecking for a while. Any recommendations?

Re: Rattle in my Cat. '98 TJ
 

Take it off and shake out the loose pieces. If a piece is too big to shake
out, use a screwdriver or chisel to break it. Wear a dust mask and googles
because that crap gets everywhere.

Carl

"GTK" <gkucera@yahoo.com> wrote in message
news:NpbRg.6655$tT6.1041@bignews7.bellsouth.net...
> '98 TJ 4.0L Manual
>
> I've got an annoying rattle in my Cat converter at idle speed. Thought at
> first it might be the headers. But with engine off, I can go down under
> and bang on the Cat and clearly hear the rattle inside. Is the Cat toast?
> OBCII finds no codes. Just had emissions inspection 2 months ago so won't
> be rechecking for a while. Any recommendations?

Re: Rattle in my Cat. '98 TJ
 

Take it off and shake out the loose pieces. If a piece is too big to shake
out, use a screwdriver or chisel to break it. Wear a dust mask and googles
because that crap gets everywhere.

Carl

"GTK" <gkucera@yahoo.com> wrote in message
news:NpbRg.6655$tT6.1041@bignews7.bellsouth.net...
> '98 TJ 4.0L Manual
>
> I've got an annoying rattle in my Cat converter at idle speed. Thought at
> first it might be the headers. But with engine off, I can go down under
> and bang on the Cat and clearly hear the rattle inside. Is the Cat toast?
> OBCII finds no codes. Just had emissions inspection 2 months ago so won't
> be rechecking for a while. Any recommendations?

Re: Rattle in my Cat. '98 TJ
 

Take it off and shake out the loose pieces. If a piece is too big to shake
out, use a screwdriver or chisel to break it. Wear a dust mask and googles
because that crap gets everywhere.

Carl

"GTK" <gkucera@yahoo.com> wrote in message
news:NpbRg.6655$tT6.1041@bignews7.bellsouth.net...
> '98 TJ 4.0L Manual
>
> I've got an annoying rattle in my Cat converter at idle speed. Thought at
> first it might be the headers. But with engine off, I can go down under
> and bang on the Cat and clearly hear the rattle inside. Is the Cat toast?
> OBCII finds no codes. Just had emissions inspection 2 months ago so won't
> be rechecking for a while. Any recommendations?

Re: Rattle in my Cat. '98 TJ
 

In article <45154EFF.F18928C4@sympatico.ca>,
Mike Romain <romainm@sympatico.ca> wrote:
>The one on our 88 rattled when we first got it about 10 years ago. Then
>it stopped. The jeep has passed all the emissions to date. I just had
>to take the cat off due to a leak and it was a hollow can with nothing
>inside.
>
>Mike

It just goes to show that your jeep is tuned. Also, the 88 has some high
limits. I'm sure you put the hollow can back on as planned. :-)


--
Jeeps and dubs and everything's nice...

Re: Rattle in my Cat. '98 TJ
 

In article <45154EFF.F18928C4@sympatico.ca>,
Mike Romain <romainm@sympatico.ca> wrote:
>The one on our 88 rattled when we first got it about 10 years ago. Then
>it stopped. The jeep has passed all the emissions to date. I just had
>to take the cat off due to a leak and it was a hollow can with nothing
>inside.
>
>Mike

It just goes to show that your jeep is tuned. Also, the 88 has some high
limits. I'm sure you put the hollow can back on as planned. :-)


--
Jeeps and dubs and everything's nice...

Re: Rattle in my Cat. '98 TJ
 

In article <45154EFF.F18928C4@sympatico.ca>,
Mike Romain <romainm@sympatico.ca> wrote:
>The one on our 88 rattled when we first got it about 10 years ago. Then
>it stopped. The jeep has passed all the emissions to date. I just had
>to take the cat off due to a leak and it was a hollow can with nothing
>inside.
>
>Mike

It just goes to show that your jeep is tuned. Also, the 88 has some high
limits. I'm sure you put the hollow can back on as planned. :-)


--
Jeeps and dubs and everything's nice...