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Author Topic: Exhaust smoke tests... are these used in garages?  (Read 1458 times)

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Webby the Bear

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Exhaust smoke tests... are these used in garages?
« on: 15 January 2013, 21:41:28 »
As above really. would love a definitive answer as to whether i have an exhaust leak. and then i read about this.

anyone ever used or know of a shop i can get this done?  :)
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tunnie

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Re: Exhaust smoke tests... are these used in garages?
« Reply #1 on: 15 January 2013, 21:47:01 »
Best way is to feel around the exhaust for hot gasses. Or put you hand over (briefly) to cover the exhaust tail pipe, see if when covered it gives a lot of back pressure.

Common places are flange to the cat & between centre boxes to back box. 9/10 it fails on the pipes to the back box
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Entwood

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Re: Exhaust smoke tests... are these used in garages?
« Reply #2 on: 15 January 2013, 21:47:46 »
One way of checking for an exhaust leak is very, very simple......

With engine running at tickover only, use a large handful of cloth and hold tightly over the end of the exhaust pipe.. you will feel the pressure build up considerably, if it doesn't you have a BIG hole, if the pressure builds up and you hear an increasing loud "hiss" you have a smaller leak, if the pressure builds and, either the engine stalls, or you can no longer hold against the pressure, you have no leak ...

simples ....  :)

There is one other scenario ....  if the pressure starts to build, then there is a loud bang and the pressure drops, your exhaust system was weak and you have just blown a bloody great hole in it ... you now have a large leak ....  :)

Must type faster .. same idea as Tunnie's .. but a bit more descriptive :)
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Webby the Bear

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Re: Exhaust smoke tests... are these used in garages?
« Reply #3 on: 15 January 2013, 21:51:45 »
cheers boys, i will try this. thanks very much  :y

out of interest and just cos i've seen some ''interesting'' youtube tests..... anyone ever heard of ''Seafoam''? seems the yanks use it a lot. surprised i cant find an english alternative!

thanks boys  :y :y :y
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Strangechap

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Re: Exhaust smoke tests... are these used in garages?
« Reply #4 on: 15 January 2013, 22:57:10 »
Lots of the yanks on the Trans Am forums I loiter on use Seafoam, its good for cleaning carbs/fuel system and stabilising petrol over the winter when our 'birds are off the road.
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Kevin Wood

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Re: Exhaust smoke tests... are these used in garages?
« Reply #5 on: 16 January 2013, 00:11:07 »
The best method by far... Take one latex glove, bin liner or large balloon, and a roll of duct tape.

Make sure the camera is rolling..
Approach the rear of TheBoy's your vehicle..
Attach to exhaust..
Wait..

 ;D
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omega3000

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Re: Exhaust smoke tests... are these used in garages?
« Reply #6 on: 16 January 2013, 06:56:21 »
Bring it over steve , jack it up and we can stuff a rag over the exhaust while you underneath it , thats  what we did to my elite but there was no leaks and very good pressure  :y
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Jimbob

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Re: Exhaust smoke tests... are these used in garages?
« Reply #7 on: 16 January 2013, 07:37:27 »
Quote from: Kevin Wood on 16 January 2013, 00:11:07
The best method by far... Take one latex glove, bin liner or large balloon, and a roll of duct tape.

Make sure the camera is rolling..
Approach the rear of TheBoy's your vehicle..
Attach to exhaust..
Wait..

 ;D

You mean like this?











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omega3000

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Re: Exhaust smoke tests... are these used in garages?
« Reply #8 on: 16 January 2013, 07:48:07 »
 ;D ;D ;D
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Gaffers

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Re: Exhaust smoke tests... are these used in garages?
« Reply #9 on: 16 January 2013, 08:21:16 »
 ;D ;D

The next step of that prank is under development  ::)
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Webby the Bear

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Re: Exhaust smoke tests... are these used in garages?
« Reply #10 on: 16 January 2013, 09:00:07 »
hahahaha nice!!!

cheers steve, we can sort all this out next sunday while youre removing them there butterflies  ;D ;D ;D
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TheBoy

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Re: Exhaust smoke tests... are these used in garages?
« Reply #11 on: 16 January 2013, 17:56:18 »
How very childish...  >:(

I didn't laugh....   ....much ;D
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cem_devecioglu

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Re: Exhaust smoke tests... are these used in garages?
« Reply #12 on: 16 January 2013, 18:32:37 »
 ::)  hmmm.. I have good plans for job friends ;D
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omega3000

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Re: Exhaust smoke tests... are these used in garages?
« Reply #13 on: 16 January 2013, 19:46:58 »
Quote from: Webby the Bear on 16 January 2013, 09:00:07
hahahaha nice!!!

cheers steve, we can sort all this out next sunday while youre removing them there butterflies  ;D ;D ;D


I think i got a spare pink marigold  ;D ;D ;D
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Webby the Bear

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Re: Exhaust smoke tests... are these used in garages?
« Reply #14 on: 16 January 2013, 20:06:38 »
Quote from: EMD on 16 January 2013, 19:46:58
Quote from: Webby the Bear on 16 January 2013, 09:00:07
hahahaha nice!!!

cheers steve, we can sort all this out next sunday while youre removing them there butterflies  ;D ;D ;D


I think i got a spare pink marigold  ;D ;D ;D

lol should be no need mate. i got F1 utocentre doing a free exhaust leak check tomorrow just for completeness  8)
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