16 HP B&S engine, aluminum block. It has 1" iron pipe screwed in forthe exhaust manifold. No luck so far in removing the pipe. I need tosave the threads. I've used PB Blaster and tapped on the pipe with ahammer.I want to try heat before sawing a slit in the pipe interior andpeeling it out. Should the heat be directed at the iron pipe oraluminum block?

The aluminum block.The thread ID will get bigger.--Winston

Where to apply the heat

Oct 12, 2010 23 Replies

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RBnDFW 15 years ago

He says the engines are still assembled.

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spaco 15 years ago

Yeh, I saw that he said he didn't want to overhaul now. But, is it one engine or two? 16hp--- sounds like a 2 cylinder?

Pete Stanaitis

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RBnDFW wrote:

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stans4 15 years ago

I've used the ATF and acetone mixture for removing a Marlin 39 barrel from a 60 year-old gun. Soaked it for a week, came loose with the first whack on the receiver wrench. Before that, it was stuck solid.

60 years of .22 residue will do that.

Stan

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spaco 15 years ago

Okay, here we go again: Saw off the pipes as needed. Thread the ends and attach fittings.

---or---

Saw off the pipes as needed. Weld or braze new tubing onto the ends.

I say these things because I have had such poor success getting steel out of aluminum, even in much smaller sizes.

See:

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Pete Stanaitis

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