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Chat Area => General Car Chat => Topic started by: Webby the Bear on 15 January 2013, 21:41:28

Title: Exhaust smoke tests... are these used in garages?
Post by: Webby the Bear 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?  :)

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: tunnie 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

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: Entwood 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 :)

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: Webby the Bear 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

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: Strangechap 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.

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: 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

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: omega3000 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

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: Jimbob 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?

(http://i202.photobucket.com/albums/aa229/littlejimmym/Newent2011/IMG_6094.jpg)

(http://i202.photobucket.com/albums/aa229/littlejimmym/Newent2011/IMG_6095.jpg)

(http://i202.photobucket.com/albums/aa229/littlejimmym/Newent2011/IMG_6096.jpg)

(http://i202.photobucket.com/albums/aa229/littlejimmym/Newent2011/IMG_6097.jpg)

(http://i202.photobucket.com/albums/aa229/littlejimmym/Newent2011/IMG_6098.jpg)

(http://i202.photobucket.com/albums/aa229/littlejimmym/Newent2011/IMG_6099.jpg)

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: omega3000 on 16 January 2013, 07:48:07

 ;D ;D ;D

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: Gaffers on 16 January 2013, 08:21:16

 ;D ;D

The next step of that prank is under development  ::)

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: 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

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: TheBoy on 16 January 2013, 17:56:18

How very childish...  >:(

I didn't laugh....   ....much ;D

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: cem_devecioglu on 16 January 2013, 18:32:37

 ::)  hmmm.. I have good plans for job friends ;D

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: omega3000 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

Title: Re: Exhaust smoke tests... are these used in garages?
Post by: Webby the Bear 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)