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Author Topic: Exhaust manifold cracked ?  (Read 3477 times)

Offline spudboy6

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Exhaust manifold cracked ?
« on: 05 January 2013, 22:24 »
so have a tucking noises from under the car on cold start so thinking my manifold is cracked ,

So wanting to whip it off and crack test it over the next week or so.

Its only a 1.8 8v adz SPI , anyone got any tips on removal , I have access to a ramp so shouldn't be to hard , and also having problems choosing gaskets , does the manifold have one big gasket or 4 individual ones ?

Lastly if its cracked can I weld / braise it up ?

Cheers :)
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Offline Turbotezz

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Re: Exhaust manifold cracked ?
« Reply #1 on: 06 January 2013, 08:21 »
sounds like the same prob with the AGG. Dropping my manifold off today. Easiest from underneath, drop the down pipe off for access. I have individual ones from Euro.
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Offline thai-wronghorse

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Re: Exhaust manifold cracked ?
« Reply #2 on: 06 January 2013, 09:12 »
My AGG had two cracked manifolds in the time i owned it.  Poxy thing.  :angry:
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Offline CJA321

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Re: Exhaust manifold cracked ?
« Reply #3 on: 06 January 2013, 09:59 »
Dont weld it. Really hard to make the welds last on manifolds, you have to heat them then weld some special way iv been told. Iv allways just replaced  :smiley:
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Offline Screech16v

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Re: Exhaust manifold cracked ?
« Reply #4 on: 06 January 2013, 11:16 »
Welded a few manifolds before you need to use special rods for cast,drill the ends of each crack,v groove along the cracks and really get it clean then heat the whole area up,weld it and if your lucky it wont crack whilst its cooling,so can be done but a pita sometimes.
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Offline thai-wronghorse

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Re: Exhaust manifold cracked ?
« Reply #5 on: 06 January 2013, 11:21 »
Not worth the hassle.  Replace it.
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Offline spudboy6

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Re: Exhaust manifold cracked ?
« Reply #6 on: 06 January 2013, 11:28 »
Quote from: Turbotezz on 06 January 2013, 08:21
sounds like the same prob with the AGG. Dropping my manifold off today. Easiest from underneath, drop the down pipe off for access. I have individual ones from Euro.

Are the individual and single long manifold gaskets the same then just split up ?
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Offline spudboy6

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Re: Exhaust manifold cracked ?
« Reply #7 on: 06 January 2013, 11:31 »
Quote from: thai-wronghorse on 06 January 2013, 11:21
Not worth the hassle.  Replace it.

Seems the feeling is replacement , so do you buy second hand ones I presume ? Just don't want to buy another bad egg .

And I need to confirm its tossed first really , hard to find this blow as only happens when stone dead cold for 3-5 mins then goes away , is present under front of the car area mainly by the wings and in the bay ,

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VW BUSH

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Re: Exhaust manifold cracked ?
« Reply #8 on: 06 January 2013, 13:08 »
Cracked manifolds will show soot or vapour damage around the cracked area.
You can also use crack detector or ring it and listen for the tell tale noise.
No point welding it as there a millions in the scrap yards going for pennies :smiley:

New set of gaskets would be my first port of call
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Offline Turbotezz

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Re: Exhaust manifold cracked ?
« Reply #9 on: 09 January 2013, 20:10 »
id do a new manifold at the same time, just done gaskets on my AGG and it was a mare!!!!

Yes, AGG gaskets are as you described and your symptoms are that of a cracked fanny mold
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