Thread: Extraction Welding Rod

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I agree with 61bone. I saw this trick the first time 40 years ago with plain old stick welding and have used it several times over the years.

It's more the method (the heating and cooling and getting the oil to seep into the threads) than the rod/wire used.

The exhaust manifold bolts on my Cadillac 500 were seized up and crystalized (if that's a suitable description for the situation) and stretched my dirty-word vocabulary to the maximum. Getting them out intact was impossible. It didn't take much torque at all to twist the danged things off and that's just what I did to five or six of them. I finally quit trying and took the heads to my machine shop guy and learned pretty quick that those guys are not happy when they find broken off "easy-outs" in the holes.

When I went to pick them up I asked him how the heck he got them out and he said "Man, I couldn't do it, and we tried everything we knew, so we had to "heli coil" them.

That was two years ago and I haven't had any problems, but this thread got me wondering if the job could have been done using extraction rod. I had never heard of the procedure.

Incidentally, I think Helicoils are a big fraud perpetrated on guys like me.


Jim

Originally Posted by Big Tracks

The exhaust manifold bolts on my Cadillac 500 were seized up and crystalized (if that's a suitable description for the situation) and stretched my dirty-word vocabulary to the maximum. Getting them out intact was impossible. It didn't take much torque at all to twist the danged things off and that's just what I did to five or six of them. I finally quit trying and took the heads to my machine shop guy and learned pretty quick that those guys are not happy when they find broken off "easy-outs" in the holes.
Jim

yes we are not ...i at that point load them up on the mill center up on the hole use a soild carbide ball mill and hope you ez out is not as hard as my ball mill i most of the time do not have to use a heil a coil less they are Fu#k up bad seams the drill alway finds the the head and not the bolt they drill so then they will need coils best thing to do is not mess with them last one i did someone stop buy with a busted off crank bolt in a short block and ez out to i did get the hole mess

Another technic is pipe when they are to deep to weld a nut to . Of course this only works on larger diameter bolts . You have to be ready and set up with pipe in position and welding rod inserted down in pipe . Then connect the ground and weld . Takes 2 people but works great with a small pipe wrench .