How do you remove a broken bolt from an exhaust manifold
Ive got a bitch of a problem with my motorbike. l was replacing the exhaust
when one of the manifold bolts snapped. l heated it up before hand with an
oxyacethelene torch but it still snapped. The remainder of the
bolt is flush with the mandfold so l cant get any vice grips on it.
/> l tried drilling it out. l went and brought some Cobalt tipped HSS
drill bits. Using a beast of a dewalt corded drill. But it didnt even touch
the stud. Does anyone know of any other drill bits that are specifically designed to cut through high tensile steel? Diamond tipped drill bits perhaps? But l cant seem to find any in the local hardware shops. Once a pilot hole had been made the intention was to use a reverse thead stud remover. Any information or alternative techniques on this problem would be very much appreciated.
carbide tipped drills work well, or masonry drills may help.
the bolt has been ''work hardened'' due to all the heat it has seen. if
that doesn't work you could try a ''left handed'' drill bit but you will
need a drill press. If all else fails take the head off and go to your
nears machine shop those guys deal with this stuff all the time.
Jonsul suggested a very qualified answer. Once I was held up in
the same situation and with patience I took it out. The only thing missed
is to spray WD40 and when pushing through the hole with that extractor you
have to use very slowly the hand held spanner or a socket enabling to make
new threads while pushing its way in slowly. This extractor will go the
opposite way. There is a set of 3'/4 depends on your choice from hardware
shop or motorists shop. Good luck.
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