NEW METHOD TO REMOVE BROKEN HEADBOLTS

Post Options Post Options   Likes (1) Likes(1)   Quote Mr Moritz Quote  Post ReplyReply Direct Link To This Post Topic: NEW METHOD TO REMOVE BROKEN HEADBOLTS
    Posted: 11 Jun 2021 at 4:47pm
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https://www.youtube.com/watch?v=-8N0y0jVAng ;

Saw this method of removing broken headbolts. Might be handy when working on old outboards.. Needs a MIG welder though..
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Post Options Post Options   Likes (0) Likes(0)   Quote MacSkipper Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jun 2021 at 5:23pm
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makes it look easy - I dont have a MIG though.
Good fishing trip nothing breaks, great trip catch fish.
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Post Options Post Options   Likes (0) Likes(0)   Quote Alan L Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jun 2021 at 6:38pm
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I don't see why you need a MIG. Arc should do as well - small rod, slowly build it up. Have done similar with arc before.
There is another way too - spark erosion - but not for home w/shop.  But does good job in tricky spots.
Alan
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Post Options Post Options   Likes (0) Likes(0)   Quote Steps Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jun 2021 at 9:24am
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Thats old school...nothing new, just maybe 'lost skills' (??)
Thu tacking the screw driver like that the weld will snap.
We would build up little higher, take a bolt , abiout 1/2" long, taper the end into a V  Then weld that to the stack.

Also very important to soak it for a good 24 hrs if snapped due to corrosion

The 2nd part.. cast iron exhaust manfolds, snapped studs.
We used to again use a bolt as above.... never thought to use a nut like that.
 Never done it or tried with arc.
Done 2nd also with tig which is far easier ... and reliable not to snap
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Post Options Post Options   Likes (0) Likes(0)   Quote Alan L Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jun 2021 at 3:17pm
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There are one or two U tube postings on that theme - each guy has a slightly different take on it - but same principle. It really is the heat that does the job - gets the heat down the block on to the threads - which is hard to do otherwise.
Mig is probably the smarter course for small stuff like that - harder to control the heat on arc. But not impossible if that is all you have.
I had one job I was afraid to tackle - on an expensive Al head. Gave it to a local specialised auto machine shop and they did a good job using spark erosion.
U tube has lots of handy w/shop tips - which like Steps said - are probably never new - just forgotten or not discovered (by you).  Some rainy day it is worth poking around on them. The trick is to remember them when you need them - getting harder every day.
Alan
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