Exhaust Manifold

Johnnykick · Jul 14, 2018

I posted this message some months ago but wanted to include a pic this time. I need to replace the exhaust manifold on this 1955 International 100. As you can see, the bolts are severely rusted. Would you take it to a machinist? If I fail in my attempt, I will be unable start this tractor to get it into a shop. Thoughts?

Johnnykick · Jul 14, 2018

Janicholson · Jul 14, 2018

Using a sharp cold chisel. split each nut till it fails. don't hit sideways, hit towards the block, starting at the surface shown and going away from the view point. a sharp chisel is mandatory, but it will get them all loose. If you are careful, you can save the threads on the studs. Jim

Oregon Tractor Jack · Jul 14, 2018

First clean the studs/nuts with a wire brush as best you can. Next get a high quality penetrating oil. I prefer Kroil. Spray them down. Go do something else for a day. Spray them down again and go away for a day. Give them a try. You might have to use some metric sockets since the nuts have rusted so much. You would be surprised how easy they will come off.

OTJ

gmcdeadhead · Jul 15, 2018

heat the nut up with a torch until cherry red, the nut will come right off. i've seen alot worse than that

Charlie M · Jul 15, 2018

I've never changed a manifold where the bolts didn't look like yours and have never broken on taking it off with a socket. Maybe I've just been lucky. I've had several where the whole stud unscrewed. Personally I would try the heat deal people have mentioned and a socket before trying something more drastic.

ih560 · Jul 15, 2018

I agree those don't look bad at all. All the ones that I have removed from tractors for restoration have looked at least that bad and I have never had an issue. Worst case is, the whole stud unscrews from the head. At that point it is not worth messing with removing the nut from the stud, just buy new. The hardware store here in town has all those studs on the shelf and aren't much more than $1.50 each.

47fivewindow · Jul 15, 2018

If they are loose in the socket, try a 14mm six point. They are a little smaller. Heat is your friend.

taperrine · Jul 30, 2018

I'd recommend taking it to a good machine shop. A broken drill bit or easy out only makes the task more difficult. I broke a exhaust manifold bolt on the head of my M. Even the machine shop had problems getting it out, so I never would have gotten it out myself.

mattofvinings · Jul 31, 2018

The posts recommending Kroil, 6 point sockets tapped onto the nut and oxyacetylene would follow my recommendations. Dont even mess with a propane torch as its not enough heat.

In my mind, the only reason not to use the blue wrench on rusted or stuck fasteners is the probability something nearby would be permanently melted (usually paint, wiring, plastic/rubber parts)

BarnyardEngineering · Jul 31, 2018

I'd go right straight for the oxy-whatever torch.

This is the hottest external location on the tractor, so there should be nothing there for the torch to damage, especially since the manifold is coming off.

Keep a nice tight flame on the torch, and try to heat just the nut to cherry red.

Exhaust Manifold

Johnnykick

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Johnnykick

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Janicholson

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Oregon Tractor Jack

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gmcdeadhead

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Charlie M

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ih560

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47fivewindow

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taperrine

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mattofvinings

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BarnyardEngineering

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