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exhaustief manifold stuck


Jac

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Hi guys, I am really enjoying this forum. It is very valuable for a beginner like me.

 

Does anyone has an idea what I can do best to get my manifold off?

There are still 2 thread ends in which I drilled almost to the end. But the manifold still will not go off and there is totally no movement. Now I am not sure how to continue.

 

 

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Seconding the post from Adams, I've missed that one twice when pulling manifolds. Once that one was loose I was able to give it a jiggle and it came off. Just don't bang on the manifold that's how I cracked my last one...

 

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I counted 13, including the 2 that I still have to do. Do you mean there are 2 more somewhere? I have looked everywere (I think) but cannot find those. Can you explain were they should be?

 

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I had to remove the intake and exhaust manifolds on my 1947 P15 a few days ago.  It was a challenge.  The stud at #9 would not let go. The nut came off - the stud was stuck in the manifold.  We heated, oiled and banged for two days.  I had removed the inner wheel well for access on the second day.  Gives great access to the side of the engine.  On the third day I went on line and found an exhaust manifold and ordered it.  On the fourth day I used a grinder and removed the old exhaust manifold piece by piece.  The stud at #9 finally broke off in the block and everything came apart.  It was easy to get to and drill out the broken stud with the inner wheel well removed.

 

Good Luck

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I had a 1942 DeSoto I had to break the manifold apart to remove it also.

Because of those two rusted studs.

Much easier and labor wise less costly to install another manifold on that job.

I air chiseled the old manifold apart from the two studs...then unscrewed the long studs out of the block.

 

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I have an air chisel and I didn't think of that. Would have been a much cleaner job. Grinding cast iron makes a really big mess. I spent the fifth day cleaning up the shop and cleaning the block so it's ready to install the new parts when they get here. Hope they get here soon. 

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After drilling the threat end almost until the block and with brutal force a hammer and chisel between the block and the exhaust, finally the threat ends brake off.

The exhaust is still almost perfect!

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4 minutes ago, Jac said:

After drilling the threat end almost until the block and with brutal force a hammer and chisel between the block and the exhaust, finally the threat ends brake off.

The exhaust is still almost perfect!

 

Excellent! Get a stud extractor and you may be able to get some of the studs out without needing to drill them.

 

410EhzB9VoL._AC_UL115_.jpg

 

Wow.........a plastic fuel filter right next to the exhaust manifold.........

Edited by Sam Buchanan
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Today something terrible happened.. My exhaust feld down on de concrete floor..

So after a lot of work I still need to order another one if I can find one.

 

20200717_085150_copy_800x600.jpg

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I had an "ear" on one of flanges on my exhaust manifold welded about 5 years ago.  It is still OK.  Yours is aq bigger break, but that might actually be easier to repair because there is more surface area to weld to. 

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I've done it with high nickle arc welding rod.

1. wait for spouse to go out for the day

2. turn oven to VERY HOT 600+ deg

3. heat manifold to VERY HOT while preparing your welder

4. weld for 2-3 minutes and put back in oven for 10 minutes 

5. leave in oven after welding and lower temps over a few hours

 

Hard, yes - Impossible, no

 

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