sucksqueezebangblow
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| posted on 13/5/08 at 08:28 AM |
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Fencewrecker got a similar seized bolt out of his Mazda engine casing with the welded nut trick last night so I'm definitely going to fire up
the welder and have a go. There is slighty more than a 90 degree angle between the bolt axis and the mating face (gasket surface) but again
Fencewrecker came up with the suggestion of chamfering the nut so I'll do that to stop the nut face gouging the mating face of the casing. Wish
me luck!
Better to Burnout than to Fade Away JET METAL ~ AndySparrow © 
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sucksqueezebangblow
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| posted on 18/5/08 at 06:40 PM |
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What a weekend! Bought M6 nuts and bolts to practice welding nuts to bolts but quickly realised MIG was striking to the nut while I was trying to
strike it to the bolt. Switched to M8 nuts and was successful so began welding nuts to the two siezed bolts. Got good welds every time but shaft of
bolts sheared again each time. Probably because I had drilled them out for the thread extractor. When they sheared however the broken bits of thread
extractor came with them! So a minor success at least.
Eventually gave up the welded nut approach and decided heart-in-mouth to drill and tap out the sheared shafts. Drilled them out 3m then 4mm then 5mm
and then put through an M6 tap.
Success, and the internal threads are still good! What a relief!!! 
I won't make the mistake of using thread extractors again! I reckon the welded nut trick would have worked if the shafts had not been driled
out! Certainly a new way of removing broken thread extractors!!
Better to Burnout than to Fade Away JET METAL ~ AndySparrow ©
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