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Old 08-26-2010, 10:08 AM   #18
sailor
Crankshaft
 
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Posted via FF MobileUmmm.... I think you`ve got it backwards, heating bolt to expand it would make threads tighter in the hole.... Unless you`re thinking it would get enough longer when heating just the end to reduce the tension on it.... Heating bolts generally makes them snap easier & they`re tighter in whatever they screw into - heat on NUT (crankshaft in this case) would expand it, but crank isn`t accessable & I wouldn`t want to heat it much anyways! The last person with this issue had an overtorqued bolt that caused too much "sticktion" under the shoulder to turn out with reasonable force. bolt came out easily once head was cut off & tension released. That`s why I mentioned higher torque impact wrench, it`ll break or come out & removal/replacement becomes easier then - avoiding the PITA of trying to grind a LARGE head off in a confined space.....
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