Exhaust pipe frozen to head.

[DAM shop]

So we have a 74 70 that we can't get the head pipe out of the head, frozen. Any suggestions? I would like to save the pipe unless someone has a stock one then I'll just replace the head. I would hate to cut this pipe if I don't have to..

[fabiodriven]

Soak soak soak. Kroil, freeze off, Kimball Midwest makes a penetrating oil that almost dissolves rust. A torch could help as well.

[DAM shop]

Thanks fabs.

[fabiodriven]

I'm assuming you're familiar with the fire wrench? Heat the head, not the pipe. You could even keep a wet rag on the pipe to keep it as cool as possible for a good heat differential.

[Scootertrash]

I've also heated both parts as independantly as possible. Kroil for a couple hours. Heat the head, let it cool, heat the pipe, let it cool. Kroil, etc. Sometimes the expansion and contraction of a couple rounds of repeated heating and cooling cycles works wonders. After it's cooled off some light to moderate raps with a dead blow or rubber hammer can bust it loose. Swing it like a purse, not a hammer, you don't want to dent the pipe, hence the rubber hammer or a dead blow hammer. Patience is the key.

I have so many projects going at once I can focus (only briefly do to my self-diagnosed ADD........ LOOK! A squirrel!) on another project while something soaks or cools off.

[dirtface]

Don't cut!! Last resort, hard pipes to find, one year only, and usually not cheap.

[DAM shop]

Thanks for the sound advise guy's will give all a try..

[El Camexican]

I've have luck breaking things loose by heating everything and then cooling the part that is least likely to be damaged by a rapid cooling (in your case the pipe) by either placing an ice cube on it (brake bleed screws and bolt heads) or gripping them with a cold wet rag (might work on your pipe).

Protect yours hands and eyes, steam is a wicked animal.

[AMK]

This is easier than broken studs.
Heat, oil, patience.