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exhaust system possible noise 

 

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 Post subject: exhaust system possible noise
Posted: Sun Jun 05, 2011 10:11 pm 
Getting Side Ways
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Age: 58

Posts: 1027

Joined: 13th Sep 2010

Ride: Ford Falcon AU 2000 Series II

Location: Eagleby
QLD, Australia

Hello again,

I've been over some rough road last month and drive many kilometres a day.

Lately I have been starting to hear a noise coming from under my car each time I start to accelorate .e.g from 60 to 100 kph ...noise appears to be constant and becoming worse.

I jacked the car up and found what looks like a crack in an exhaust muffler or is it the catalytic convertor...hmmm, not sure, all I can tell you its underneath the drivers side and towards the front.

Can someone confirm if this is a crack and is it the catalytic convertor or normal exhaust muffler?

Cheers

 

 

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 Post subject: Re: exhaust system possible noise
Posted: Sun Jun 05, 2011 10:18 pm 
Getting Side Ways
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Age: 31

Posts: 623

Joined: 24th May 2007

Gallery: 9 images

Ride: 97 TICKFORD XR6 Manaul

Location: Aldinga Beach
SA, Australia

from what bi can see that is the cat
its the first muffler looking thing attached to the exhaust after the headers with a heat shield wrapped around it
they are pretty cheap to get from the wreacker around 50-100 depending on the wrecker
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 Post subject: Re: exhaust system possible noise
Posted: Sun Jun 05, 2011 10:19 pm 
Oompa Loompa
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Ride: 97 XH11 XR6

Location: Sydney
NSW, Australia

mate is that just after the exhaust manifold because to me it looks like the catalytic converter
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 Post subject: Re: exhaust system possible noise
Posted: Sun Jun 05, 2011 11:41 pm 
Getting Side Ways
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Age: 31

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Joined: 24th May 2007

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Ride: 97 TICKFORD XR6 Manaul

Location: Aldinga Beach
SA, Australia

it is pretty easy to take the shield off
youll need a pare of pliers and tin snips
at each end there should be a clamp you can cut off
then you only need to un fold the edges to remove the shield
putting it back on is the reverse but youll need to use some new clamps
i use some large hose clamps that i had laying around but you dont really need to but it back on
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 Post subject: Re: exhaust system possible noise
Posted: Mon Jun 06, 2011 6:46 am 
Getting Side Ways
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Age: 58

Posts: 1027

Joined: 13th Sep 2010

Ride: Ford Falcon AU 2000 Series II

Location: Eagleby
QLD, Australia

Gavin Dunn wrote:
mate is that just after the exhaust manifold because to me it looks like the catalytic converter


G'day Gavin,

Yeah mate, its the first thing I noticed after the exhaust manifold that I can see.

I have noticed when the engine is cold, I hardly get a noise but gradually gets worse as it warms up.

I've been off road a few times with her, if those knuckle heads who drive 4WD's properly instead of screwing up the dirt roads leaving ruts behind, chances are it would still ok.

I'll have to have a good look. and use higher stands.
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 Post subject: Re: exhaust system possible noise
Posted: Mon Jun 06, 2011 6:51 am 
Getting Side Ways
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Age: 58

Posts: 1027

Joined: 13th Sep 2010

Ride: Ford Falcon AU 2000 Series II

Location: Eagleby
QLD, Australia

G'day to those who replied to my question.

I'll have to check it out again and will have to replace it soon, damn noise gets worse than before. When the engine is cold and running, hardly any noise, when she's warmed up wow, noise is very audible.

When stopped and start to accelerate to speed, yeah, very noticable, seems like a rattling / vibrating noise like metal then gradually becomes louder.
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 Post subject: Re: exhaust system possible noise
Posted: Mon Jun 06, 2011 9:32 am 
Oompa Loompa
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Age: 27

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Joined: 23rd May 2011

Ride: au2 ute 6cyl auto

Location: Camden
NSW, Australia

Hi mate i had the same problem twice, its not the heat shield on the cat, it doesnt carry anything so it wont leak, its one of the gaskets in a flange near by, if youve given the cat a wack it would have stuffed a gasket, thatl only cost ya $30 at an exhaust shop.
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 Post subject: Re: exhaust system possible noise
Posted: Mon Jun 06, 2011 9:30 pm 
Getting Side Ways
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Age: 58

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Joined: 13th Sep 2010

Ride: Ford Falcon AU 2000 Series II

Location: Eagleby
QLD, Australia

Thanks for that, I never would have given that a thought or possibility.

Yep, will get another couple to be on the safe side.

Cheers
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 Post subject: Re: exhaust system possible noise
Posted: Tue Jun 07, 2011 5:22 pm 
Oompa Loompa
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Ride: au2 ute 6cyl auto

Location: Camden
NSW, Australia

no worries mate, i thought the same thing as i had a big tear in my cat heat shield, but from the hit it had stuffed a gasket on the cats flange where it joins the extractors, if the cat itself has collapsed internally it will be a noise that you couldnt stand, not on off or dealable, but get it checked anyway....???
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 Post subject: Re: exhaust system possible noise
Posted: Wed Jun 08, 2011 10:17 am 
Getting Side Ways
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Age: 58

Posts: 1027

Joined: 13th Sep 2010

Ride: Ford Falcon AU 2000 Series II

Location: Eagleby
QLD, Australia

Hi guys,

Thanks to all those who responded, I went to some exhuast joint on my way back from uni as it was driving me nuts....bloke checked the cat...cat still good (so far)...noise was coming from middle mufler...the insides of the muffler was stuffed and needed immediate replacement...so it was replaced...noise gone, but yes I will be replacing the cat a.s.a.p.

Cat has been on there for 10 years I think so it could be on its use by date soon.

Once again, thanks everyone for your assistance.

Cheers, Peter
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 Post subject: Re: exhaust system possible noise
Posted: Wed Jun 08, 2011 10:28 am 
Getting Side Ways
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Age: 29

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Joined: 30th May 2005

Ride: 1993 EB XR8

Location: BrisVegas
QLD, Australia

bondy99 wrote:
Hi guys,

Thanks to all those who responded, I went to some exhuast joint on my way back from uni as it was driving me nuts....bloke checked the cat...cat still good (so far)...noise was coming from middle mufler...the insides of the muffler was stuffed and needed immediate replacement...so it was replaced...noise gone, but yes I will be replacing the cat a.s.a.p.

Cat has been on there for 10 years I think so it could be on its use by date soon.

Once again, thanks everyone for your assistance.

Cheers, Peter


Don't be so quick to write off the cat. My NC still has the original cat, modified to suit the 3" outlet on my Pacemakers. It even has the guts still in it and it's 17 years old.

 

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 Post subject: Re: exhaust system possible noise
Posted: Wed Jun 08, 2011 10:06 pm 
Getting Side Ways
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Age: 58

Posts: 1027

Joined: 13th Sep 2010

Ride: Ford Falcon AU 2000 Series II

Location: Eagleby
QLD, Australia

Nah, not writing the old cat off...just keeping options open.

I tend to go off the bitumen track a fair deal, good fishing spots.
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