Manifold studs

[b*saint]

I am having 80% success with a bolt out, heat, and love. I dont have air. Right now my problem is two of the top 6 have rounded over with the bolt out and it no longer grips. Suggestions? These are really crusty bolts (252k miles on them.) I have not let the manifold flange get to cherry red yet.

This is the exhaust manifold on an m42/44 on the head side.

I have all new hardware so I just need the old bolt stud assembly OUT. I may fanagle vise grips tomorrow. I would like a viable solution before I start the bottom row.

[Desaevious]

I PB blasted these bitches for over a week twice a day because my car was on blocks and couldn't get an angle for the torch under there. I did it on my back using a socket extension and a U-joint. I took the whole of the rusted copper nuts and studs off so I ended up ordering new studs from blunt.

It was summer. It was hot. It wasn't fun.

[b*saint]

Well I dont know what to do about the rounded ones. The one size lower bolt out doesn't fit and the one I was using doesn't grip. I hate old cars.

[Desaevious]

Ah I missed the rounded out part. A nut splitter won't work in such a small area unfortunately. I'm curious to see what other say.

[EthirtyIS]

You can try regular sockets that are to small, spray some penetrating oil or motor oil on em and hit em on with a hammer. Or craftsmen makes a funny looking socket that grabs like An easy-out. I'll try to find a pic. Those are the most viable without the use of heat. I'm not to familiar with the m42, but could you possibly get in there with a cut off tool? Then possibly split the nut, or just cut the stud off all togeather?
Just some ideas..

http://m.sears.com/productGallery.do

[TimKninja]

Harbot freight makes a nice set stripped out bolt sockets. Ive had better luck with them then my craftsman set. Hammer the smallest possible one on if you can.

Good luck!