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FE Power Forums => FE Technical Forum => Topic started by: Qikbbstang on October 16, 2013, 07:59:23 AM

Title: Removing broken Ex-Manifold bolts from cast iron heads
Post by: Qikbbstang on October 16, 2013, 07:59:23 AM

This is a tip from the latest Engine Builder Magazine......Sure hate to think if IT fails:

Title: Re: Removing broken Ex-Manifold bolts from cast iron heads
Post by: mmason on October 16, 2013, 08:25:16 AM

That method works quite well. 40 years ago I worked for a welding repair company that specialized in keeping old trucks running. We often did things on a regular basis that others said could not be done. I also torched out frozen king pins on quite a few trucks.

Title: Re: Removing broken Ex-Manifold bolts from cast iron heads
Post by: MT63AFX on October 16, 2013, 09:52:52 AM

Quote from: Qikbbstang on October 16, 2013, 07:59:23 AM

This is a tip from the latest Engine Builder Magazine......Sure hate to think if IT fails:

It's how my uncle did it 50yrs ago. I've mentioned it a few times on the FE Forum, RodC.

Title: Re: Removing broken Ex-Manifold bolts from cast iron heads
Post by: runthatjunk on October 16, 2013, 09:41:02 PM

Is there any chance that would make the surrounding material prone to cracking or brittle?

Title: Re: Removing broken Ex-Manifold bolts from cast iron heads
Post by: cbolze on October 16, 2013, 10:05:45 PM

The female threads don't burn when torching the broken stud due to the rust between the 2 mating parts. Rust is technically "oxidized" metal, so its like trying to burn ashes, they are already burnt. Next time you fire up the torch, get a heavily rusted piece of scrap metal, grind a spot on it to white metal, and try to burn a rusty spot, then try the clean spot and see how fast it burns. Also there is a big difference in burning a steel bolt vs. cast iron head.
Courtney.

Title: Re: Removing broken Ex-Manifold bolts from cast iron heads
Post by: chris401 on October 20, 2013, 09:47:53 PM

Something my dad showed me. Haven't screwed up yet.