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Bolt Broken Off In Briggs Engine


LesH

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It was supposed to be an easy job when I started this morning working on my B10- took off the head to re insert the spark plug hole as it was wallered out. Then broke off one screw that holds the head down. An even break. I then centerpunched and drilled a 3/16 hole thru the broken screw. Then I got curious and tried to take the broken piece out using an "easy out". It broke flush with the head!! A few words----#@$#@!@&^%*()*())..... I tried chiseling to turn the broken mess but no go...... So I put the whole engine under a drill press, lined up the plugged hole by sight, clamped it down, then bought a carbide tipped 3/16 dia. 4 flute end mill and set on low rpm, very slow feed, little bites---it went right thru!!!! Then I used a tap drill and rethreaded to 5/16-18 thread. I also found a huge mouse nest under the shrould. Hope this might help someone else out....
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Usually when I break off a bolt flush I have had good luck by putting a nut slightly smaller than the bolt and welding it to the bolt thru the center of the nut. Then dowse it with water and it will braek loose any rust. Put a wrench on the nut and 9 times out of 10 it will spin right out.
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Fellows, Be very carefull welding the nut on!! If at all possible, put your ground to the nut, not the block!!! You can very possibly fuse the threads, between the bolt and the block!! JoeJ[A href='http://www.oldwelder.com']http://www.oldwelder.com[/a]
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