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Topic: Cracked Exhaust Mainfold (Read 485 times) |
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Octavian_P
Senior Member
 
 
Posts: 1126
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Cracked Exhaust Mainfold
« on: Aug 9th, 2007, 4:51pm » |
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Hi there
Being to bored of using only the 2.3 as the 2.9 still doesn't work properly i decide to do a clutch overhaul. As for symptoms i had some strange bumping noises when changing gears, hard shifts in first 3 gears, and a rumbling noise around 80-110 Km/h when accelerating. Well i found out that the transmission broke it's support and the weight of the engine and box was resting on the drive shaft. To make mater worse the clutch was ok but the dual mass-flywheel is broken...and costs and arm and a leg. Anyway, i got used to this kind of "events". On this "rampage" to dismantle the car i found why in the last month the engine seem to get increasingly louder. Well yes it has a crack in the exhaust manifold. The mechanic that helps me (...yes...another one...not the mister know all about wreaking cossies ) wanted to took it of the engine and to get it weld in argon atmosphere. I rejected this because i'm afraid of breaking the engine screws.
And now to cut a long story short, i remember that someone on the forum used a kind of solution, glue, or epoxy resin and it held OK. I would like to know what to use.
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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TiberiuS
Senior Member
Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
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Re: Cracked Exhaust Mainfold
« Reply #1 on: Aug 9th, 2007, 5:51pm » |
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Only advice I can give you is that cracked exhaust headers are common on the AJ16 Jag too, several guys on the forum (accross the pond) used 'exhaust sealer' to fix theirs and have have said it holds fine  .
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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Octavian_P
Senior Member
Posts: 1126
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Re: Cracked Exhaust Mainfold
« Reply #2 on: Aug 9th, 2007, 6:50pm » |
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Hmmm, i'll raid some shops and see if i can find something. Actually i have found a product (on the net) from bison which contains "liquid" glass, bonds to metal and last up to 1000 degrees centigrade (at least that is what is written on it). Anyway so it can be glued not mandatory to be welded.
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: Cracked Exhaust Mainfold
« Reply #3 on: Aug 9th, 2007, 11:56pm » |
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It may be able to take 1000 degrees C, but will it hold the pressure ?
As far as I know, the only way to repair an exhaust manifold is by welding it.....I could be wrong though 
I once repaired an exhaust manifold on a Cortina with a blow-torch & some cheap welding/braizing sticks from the local DIY store  .....a good option if, like me, you don't know how to weld
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pappa
Full Member
VM Diesel 2.5Tdi 90kW
Posts: 259
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Re: Cracked Exhaust Mainfold
« Reply #4 on: Aug 10th, 2007, 7:20am » |
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Welding is the way to go, if the car is for keeps! Someone had welded my
Cossies exhaust manifold before me and it has been just fine.
My experince with chemical metals etc. chemistry is that in a long run
they develop a leak. Then you're doing it again and again...
If the welder knows what his doing, it'll outlast the rest of
the car.
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My cars are the best and the pigs and cows fly.
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Octavian_P
Senior Member
Posts: 1126
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Re: Cracked Exhaust Mainfold
« Reply #5 on: Aug 10th, 2007, 12:49pm » |
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on Aug 10th, 2007, 7:20am, pappa wrote:
If the welder knows what his doing, it'll outlast the rest of
the car. |
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That is what i'm afraid of, a lot of mechanics and "specialists" in Romania generaly brake instead of repair. 
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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pappa
Full Member
VM Diesel 2.5Tdi 90kW
Posts: 259
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Re: Cracked Exhaust Mainfold
« Reply #6 on: Aug 10th, 2007, 5:28pm » |
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I see your point mate.
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My cars are the best and the pigs and cows fly.
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Octavian_P
Senior Member
Posts: 1126
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Re: Cracked Exhaust Mainfold
« Reply #7 on: Aug 12th, 2007, 3:46pm » |
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OK fingers crossed. I bought a hi temperature sealant meant for usage in hot places, and it mentions exhausts on the cars...any part. They also mention to make a rap in fiber glass and a lot of substance to be used. I hope it will hold on...
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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