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Old 11-13-2018, 06:24 AM
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toprecycler toprecycler is offline
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Join Date: Jan 2009
Location: Petoskey, Michigan
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Originally Posted by MetalWolf View Post
Are yall talking burning out the bolt with the rod ?

with cast manifolds and stubborn broken head bolts in cast heads I've always used a torch and blown em out with out damage to the threads.... the chase the threads with a tap easy peasy…..learned that back in high school....

No, I think they are talking about using a special rod that can build up a broken off bolt enough to either weld a nut on or something to get a pair of vice grips on to turn out. The rod they are talking about can be pushed down on top of the bolt even if it is broke and inch or two below the surface of the part. It has a hard flux that protects the threads from the weld filler, and is super strong.

I usually just tig weld up a tit to be able to get a pair of vice grips on it. Just did this Friday on an aluminum hydraulic motor part. A 10/32 screw broke off flush with the casting and it took about five times of welding a tit on, but it finally came out. I thought the threads were toast, but was able to just put in a replacement screw. Boss was happy. I was working the screw back in forth while watching the lathe make chips on another job.

A lot of times, the heat of welding helps break the screw loose if rusted in too. Also, I will melt candle wax around the screw threads while hot and that usually helps to remove the screw too. Great tips I learned from this forum.

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