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From: hippo on 31 Jul 2010 02:49
Warren Smith wrote:
>
> After 12 years and over 100,000 miles the tail pipe on my old clunker sprung
> a hole. I took it to Midas for a new tail pipe, the rest of the exhaust pipe
> is still in good condition.
>
> After only 2 months or 1500 miles the new tailpipe sprang a new leak! I took
> the car back and Midas welded up the problem. Now 8 months later the
> tailpipe has a new leak. Back I'll go on Monday.
>
> Any ideas on where the problem is? Faulty material or have Midas used pipe
> too thin for the job or whatever?
>
> Also, any suggestions on where to go in Sydney to get an exhaust pipe fitted
> that will actually last more than one year?
>
> Comments much appreciated
>
> Regards
>
> Warren Smith
> warren.smith(a)aol.com.au
>
>
>
>
>

Personal recommendation for Parramatta Exhaust Centre, 6 Barney Street Nth
Parramatta - 9630 5611. Obviously there are others. What area of Sydney?
Cheers

--
Posted at www.usenet.com.au
From: Kev on 31 Jul 2010 03:44
John_H wrote:
> Warren Smith wrote:
>
>> After 12 years and over 100,000 miles the tail pipe on my old clunker sprung
>> a hole. I took it to Midas for a new tail pipe, the rest of the exhaust pipe
>> is still in good condition.
>>
>> After only 2 months or 1500 miles the new tailpipe sprang a new leak! I took
>> the car back and Midas welded up the problem. Now 8 months later the
>> tailpipe has a new leak. Back I'll go on Monday.
>>
>> Any ideas on where the problem is? Faulty material or have Midas used pipe
>> too thin for the job or whatever?
>
> The reason tailpipes fail first is because they run cooler than the
> rest of the system. Corrosion caused by condensation on the internal
> surfaces is what does the damage. The problem is exacerbated if the
> manufacturing process stretches the metal on the outside of the bends.
> If that's where yours is failing find another supplier who uses a
> different bending technique.
>
> Cheapskate manufacturers also use lighter gauge tubing than they
> should... it needs to be at least 1.5mm for a reasonable service life.
>
> Even shonkier manufacturers don't use the correct material. Proper
> exhaust tubing is aluminised (and is sold by steel merchants as
> exhaust tubing). It costs slightly more than plain mild steel tubing
> and lasts considerably longer.
>


Caboolture Exhausts give a 10 year corrosion guarantee on their
Aluminised steel pipes
Don't know why anyone would pay for stainless unless they wanted it for
looks on a show car


Kev


From: Warren Smith on 31 Jul 2010 03:57

"Warren Smith" <warren.smith(a)aol.com.au> wrote in message
news:i3024q$gj9$1(a)news.eternal-september.org...
> After 12 years and over 100,000 miles the tail pipe on my old clunker
> sprung a hole. I took it to Midas for a new tail pipe, the rest of the
> exhaust pipe is still in good condition.
>
> After only 2 months or 1500 miles the new tailpipe sprang a new leak! I
> took the car back and Midas welded up the problem. Now 8 months later the
> tailpipe has a new leak. Back I'll go on Monday.
>
> Any ideas on where the problem is? Faulty material or have Midas used pipe
> too thin for the job or whatever?
>
> Also, any suggestions on where to go in Sydney to get an exhaust pipe
> fitted that will actually last more than one year?
>
> Comments much appreciated
>
> Regards
>
> Warren Smith
> warren.smith(a)aol.com.au

Hey folks, thanks for the feedback, I climbed underneith and had a closer
look at it this arvo. The old muffler is shiney with a quality galvanised
appearance eventhough it's 12-13 years old. The new piece is rusty -
obviously they've used inferior tubing.

What I can't understand is why Midas would use an obviously very inferior
quality material - materials cost nothing compared to labour costs. Maybe
they just like wasting there own time (and money) and having to do the same
job over and over again.

Parramatta is a little too far for the noise the girl is making so I'll go
back to the local Midas dealer, get it patched then head out to Parramatta
and get the job done properly!

Thanks again.

Warren



From: Warren Smith on 31 Jul 2010 04:09

"Kev" <kevcat(a)optunet.com.au> wrote in message
news:4c53d41c$0$25360$afc38c87(a)news.optusnet.com.au...
> John_H wrote:
>> Warren Smith wrote:
>>
>>> After 12 years and over 100,000 miles the tail pipe on my old clunker
>>> sprung
>>> a hole. I took it to Midas for a new tail pipe, the rest of the exhaust
>>> pipe
>>> is still in good condition.
>>>
>>> After only 2 months or 1500 miles the new tailpipe sprang a new leak! I
>>> took
>>> the car back and Midas welded up the problem. Now 8 months later the
>>> tailpipe has a new leak. Back I'll go on Monday.
>>>
>>> Any ideas on where the problem is? Faulty material or have Midas used
>>> pipe
>>> too thin for the job or whatever?
>>
>> The reason tailpipes fail first is because they run cooler than the
>> rest of the system. Corrosion caused by condensation on the internal
>> surfaces is what does the damage. The problem is exacerbated if the
>> manufacturing process stretches the metal on the outside of the bends.
>> If that's where yours is failing find another supplier who uses a
>> different bending technique.
>>
>> Cheapskate manufacturers also use lighter gauge tubing than they
>> should... it needs to be at least 1.5mm for a reasonable service life.
>>
>> Even shonkier manufacturers don't use the correct material. Proper
>> exhaust tubing is aluminised (and is sold by steel merchants as
>> exhaust tubing). It costs slightly more than plain mild steel tubing
>> and lasts considerably longer.
>>
>
>
> Caboolture Exhausts give a 10 year corrosion guarantee on their Aluminised
> steel pipes
> Don't know why anyone would pay for stainless unless they wanted it for
> looks on a show car
>
>
> Kev
>
>

Ah yes, aluminised steel pipe, that's what my original exhaust must be made
of. It was put on the car 12-13 years ago and looks almost brand new.

I understand your comment on using stainless for an exhaust. Isn't stainless
steel much harder and hasn't the ability to bend without cracking like mild
steel has?

Furthermore when/if the SS exhaust finally did crack you'd have to find a SS
specialist to weld it. And you know Murphys Law, it's bound to crack half
across the Nullabour or some off beat place where the locals have never
heard of stainless steel.

Cheers

Warren


From: Jason James on 31 Jul 2010 04:34

"Warren Smith" <warren.smith(a)aol.com.au> wrote in message
news:i30lno$h99$1(a)news.eternal-september.org...
>
> "Kev" <kevcat(a)optunet.com.au> wrote in message
> news:4c53d41c$0$25360$afc38c87(a)news.optusnet.com.au...
>> John_H wrote:
>>> Warren Smith wrote:
>>>
>>>> After 12 years and over 100,000 miles the tail pipe on my old clunker
>>>> sprung
>>>> a hole. I took it to Midas for a new tail pipe, the rest of the exhaust
>>>> pipe
>>>> is still in good condition.
>>>>
>>>> After only 2 months or 1500 miles the new tailpipe sprang a new leak! I
>>>> took
>>>> the car back and Midas welded up the problem. Now 8 months later the
>>>> tailpipe has a new leak. Back I'll go on Monday.
>>>>
>>>> Any ideas on where the problem is? Faulty material or have Midas used
>>>> pipe
>>>> too thin for the job or whatever?
>>>
>>> The reason tailpipes fail first is because they run cooler than the
>>> rest of the system. Corrosion caused by condensation on the internal
>>> surfaces is what does the damage. The problem is exacerbated if the
>>> manufacturing process stretches the metal on the outside of the bends.
>>> If that's where yours is failing find another supplier who uses a
>>> different bending technique.
>>>
>>> Cheapskate manufacturers also use lighter gauge tubing than they
>>> should... it needs to be at least 1.5mm for a reasonable service life.
>>>
>>> Even shonkier manufacturers don't use the correct material. Proper
>>> exhaust tubing is aluminised (and is sold by steel merchants as
>>> exhaust tubing). It costs slightly more than plain mild steel tubing
>>> and lasts considerably longer.
>>>
>>
>>
>> Caboolture Exhausts give a 10 year corrosion guarantee on their
>> Aluminised steel pipes
>> Don't know why anyone would pay for stainless unless they wanted it for
>> looks on a show car
>>
>>
>> Kev
>>
>>
>
> Ah yes, aluminised steel pipe, that's what my original exhaust must be
> made of. It was put on the car 12-13 years ago and looks almost brand new.
>
> I understand your comment on using stainless for an exhaust. Isn't
> stainless steel much harder and hasn't the ability to bend without
> cracking like mild steel has?
>
> Furthermore when/if the SS exhaust finally did crack you'd have to find a
> SS specialist to weld it. And you know Murphys Law, it's bound to crack
> half across the Nullabour or some off beat place where the locals have
> never heard of stainless steel.

In fact,..if you have a close look at commercial SS systems,..they are often
*very* thin,..like about less than 2mm. Why? Because as you said, they
crack, especially if too thick.

Jason


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