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Exhaust manifold crack #1631553
08/04/2019 16:10
08/04/2019 16:10
Joined: Feb 2019
Posts: 45
Behind a blue gate
clanger Offline OP
Discoverer
clanger  Offline OP
Discoverer

Joined: Feb 2019
Posts: 45
Behind a blue gate
Finally got the blowing exhaust manifold off the car and to my surprise as well as the cracks on each side of the turbo flange there is a crack approx. 240 degrees round the longest branch.

Is this repairable or scrap? I'm inclined to think its scrap as its such a big crack on cast iron.

Attached Files
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Re: Exhaust manifold crack [Re: clanger] #1631563
08/04/2019 21:44
08/04/2019 21:44
Joined: Oct 2008
Posts: 6,605
In the coupe.
magooagain Offline
Club Member 259
magooagain  Offline
Club Member 259
Forum is my life

Joined: Oct 2008
Posts: 6,605
In the coupe.
Best look for a good used one I imagine.



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Re: Exhaust manifold crack [Re: clanger] #1631564
08/04/2019 22:59
08/04/2019 22:59
Joined: Dec 2014
Posts: 363
uk
OnlyItalian Offline
Making a profit
OnlyItalian  Offline
Making a profit

Joined: Dec 2014
Posts: 363
uk
I once had an E30 325i. Renowned for manifolds cracking. Tried TIG welding but it didn't last long at all.


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Re: Exhaust manifold crack [Re: clanger] #1631567
09/04/2019 07:11
09/04/2019 07:11
Joined: Sep 2009
Posts: 4,640
ation
S
szkom Offline
Forum is my job
szkom  Offline
Forum is my job
S

Joined: Sep 2009
Posts: 4,640
ation
Contact Countrycruising on here. He used to, and probably still can repair these. The fifth branch crack is a really common problem. So much so that Fiat released later designs that have a slot in the flange that mounts to the cylinder head.

Re: Exhaust manifold crack [Re: clanger] #1631570
09/04/2019 09:34
09/04/2019 09:34
Joined: Feb 2019
Posts: 45
Behind a blue gate
clanger Offline OP
Discoverer
clanger  Offline OP
Discoverer

Joined: Feb 2019
Posts: 45
Behind a blue gate
I'm in the process of fitting another one. In my ignorance I thought the crack issue was mostly associated with the turbo flange. I don't believe this is worth repairing - I would not fit this again when welded - fit it in the skip more like.

Re: Exhaust manifold crack [Re: clanger] #1631576
09/04/2019 11:24
09/04/2019 11:24
Joined: Sep 2009
Posts: 4,640
ation
S
szkom Offline
Forum is my job
szkom  Offline
Forum is my job
S

Joined: Sep 2009
Posts: 4,640
ation
There's been a lot of positive talk of repaired manifolds over the years. I'd keep it as a spare part just in case if it was me.

When you're fitting the new manifold pay attention to the studs in the head. I'd fit new if you can as they'll have aged and gone brittle. I'd also try not to rest the manifold on the studs when you tightening it down. Try and have all the studs central in the hole and put a little upload into the turbo support. My theory is that this should allow the manifold to heat and cool a little more evenly. Hopefully prevent it cracking in the future.

Re: Exhaust manifold crack [Re: clanger] #1631580
09/04/2019 14:35
09/04/2019 14:35
Joined: Feb 2019
Posts: 45
Behind a blue gate
clanger Offline OP
Discoverer
clanger  Offline OP
Discoverer

Joined: Feb 2019
Posts: 45
Behind a blue gate
Waiting for new studs and nuts to arrive is slowing things up at the mo. Thanks for tip re the turbo.

Got to get the rear gearbox mount changed next, I don't particularly like being under the car whilst exerting that amount of torque on those mounting bolts... sick

Re: Exhaust manifold crack [Re: clanger] #1631584
09/04/2019 16:18
09/04/2019 16:18
Joined: Dec 2005
Posts: 17,122
Staffordshire
Nigel Offline
Club member 123
Nigel  Offline
Club member 123
Forum veteran

Joined: Dec 2005
Posts: 17,122
Staffordshire
Repaired manifolds are fine if they are repaired properly. Motormech can repair them and we've never had one come back

Mine was repaired about 150,000 miles ago and it hasn't had an easy life since then....


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Re: Exhaust manifold crack [Re: clanger] #1631586
09/04/2019 19:08
09/04/2019 19:08
Joined: Feb 2019
Posts: 45
Behind a blue gate
clanger Offline OP
Discoverer
clanger  Offline OP
Discoverer

Joined: Feb 2019
Posts: 45
Behind a blue gate
Ok, thanks. I'll keep it then.

Re: Exhaust manifold crack [Re: clanger] #1631710
15/04/2019 15:50
15/04/2019 15:50
Joined: Dec 2005
Posts: 7,904
South Cambs
Barmybob Offline
Hon Club Member: 003
Barmybob  Offline
Hon Club Member: 003
Je suis un Coupé

Joined: Dec 2005
Posts: 7,904
South Cambs
WOW - good job I provided the manifold with the car, never expected it to be that bad shocked

I bought the manifold from John (Bockers) and I'm sure he said it was one he got from FCSS.


Panther Black TTRS Coupé - Daytona Grey A5 Coupé (Black) - White TT roadster (Amp Black)
Re: Exhaust manifold crack [Re: clanger] #1631714
15/04/2019 16:07
15/04/2019 16:07
Joined: Feb 2019
Posts: 45
Behind a blue gate
clanger Offline OP
Discoverer
clanger  Offline OP
Discoverer

Joined: Feb 2019
Posts: 45
Behind a blue gate
.

Last edited by clanger; 16/04/2019 09:00.
Re: Exhaust manifold crack [Re: clanger] #1631717
15/04/2019 16:28
15/04/2019 16:28
Joined: Mar 2007
Posts: 10,692
Auld Reekie
Edinburgh Offline
Club Board member
Edinburgh  Offline
Club Board member
I AM a Coop

Joined: Mar 2007
Posts: 10,692
Auld Reekie
Great to see all this effort put in to preserve another coupe, especially as it's a right-hooker in a "foreign" land smile


[Linked Image]

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