I took mine to a muffler shop.

Nothing I had could heat them up like what the professionals have.

Just make sure who ever does them has enough experience to know what they are doing.

I used POR15 manifold paint. It coats real nice and stays on great, and keeps that cast iron look. You can either bake the manifolds or just run the engine, they will smoke for a bit but soon goes away after they have been sufficiently heated up. 

Cheap is such a dirty word... I would prefer you use frugal! LOL!

Anyways , Ive had success using a #3 oxy/acetylene welding tip

then turning them out with a stud remover.

There's a few good Youtube video's showing good techniques to remove rusted studs.

Not with the little propane torches, I've tried that. The manifold has to get glowing red to be assured it comes out.

A small oxy/acetylene, yes, easily.

I did last year. I've only used it a couple of time but it sure is wonderful to have when you need it. And if you buy the tiny tanks, no contract needed. You own the tanks and just pay for the fill.

It likely cost me about 500 bucks all said and done, torch kit, tanks, $15 cart from the swap meet.

I know you are right when Tim, when there's no heat available it's time to drill as you described.

However, before I'd do that I'd take them to someone with a torch. Gotta be someone you know with a torch Mark?

And you say you have a welder. Before I got my torch I was changing mufflers on our G8. One of the bolts on the muffler flange broke. I think I welded 10 nuts on that thing (they kept breaking the weld) but finally I guess it got heated up enough from all the welding and the bolt turned out. However, it takes a ton of patience to do it that way. Maybe if you tried heating the manifold as much as you can with a propane torch, then quickly weld the nut on, that combo would be enough?

One technique is to wire wheel the stud first to remove excessive rust. Heat it with a torch until red. Quench it with cold water and then slowly tighten it a hair then loosen a hair. Repeat if necessary.

I've got a portable torch with a yellow tank. Step up from propane. Got it from the Depot. It'll get things red hot.

Canadian Poncho wrote:

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There's a few good Youtube video's showing good techniques to remove rusted studs.

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 PEI guys can remove busted exhaust studs better than anyone else on the planet!!

 

Thanks

Randy

As a follow up to my original post, I was able to get all 6 studs out DIY.

5 came out with just heating the casting with a small torch till near red (the best I could get), a bunch of hard raps on the stud end with a ball peen hammer,  big vicegrips and some back and fourth. I tried one cold...no way.

The last one needed a nut welded on as the grips were spinning, and even with the nut it needed a lot of patient slight back and fourth till it began to turn.  All but the last one were done without any penetrating oil.

So sometimes just the heat from a small torch is all you'll need if lucky. Cheers and thanks for all the comments guys! 

 

Gave them a quick bead blast after,

Mark, I may have forgotten but didn't we discuss the fact that you shouldn't have manifold to head gaskets in there? I think I see one peeking out and it's yelling "na na na na naaaaaaa" at me.......