Re: Urgent help broken bolt
Look on the bright side - at least it didn't snap off flush!
Often had this happen when changing the thermostat on 'A' series engines in Mini's etc - it was always the last of the three that sheared off :ymsigh:
Macca's suggestion is good, the tool allows more leverage than mole grips, hopefully you will have enough room to use it. If room is tight you could try one of these.....
http://www.machinemart.co.uk/shop/produ ... ractor-set
ideal where access is tight - use a socket with a ratchet, harder you turn the ratchet the harder the extractor bites onto what remains of the stud. Hopefully you have enough of the broken stud protruding so you can use these.
Often a good idea to try and tighten the stud slightly before trying to 'back' it out - when it does begin to move, gradually back it out by tightening then loosening and so on, gradually increasing the amount of movement each time - and spray the WD40 in as you do.
Consider a sharp 'tap' on the head of the broken stud (not too hard) with a hammer before you start, sometimes the shock can break the corrosion that often 'welds' the fastener.
I have welded a nut onto the top of the remains of a broken stud - but this depends on access and where the offending stud is located. The benefit of this 'trick' is the heat involved often frees the fastener.
There are better penetrating fluids out there than WD40, good though it is, WD40 is more of an 'all rounder'. I use 'Wickes' penetrating fluid or 'Duck Oil'.
As already suggested, whatever you use, soak it for a couple of days before trying.
