If you are needing to use the car but have to wait for a new coil to arrive, you can get away with drying that one out in the airing cupboard or oven on very low.
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Once dry just fill that crack with araldite or rtv silicon.
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That bracket needs a clean up also as the coil earths through the bracket.
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If the screw heads are knackered you can drill the heads off with a spot weld bit then pull the coil off then get grips on the remaining thread.
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If you get prepared by buying 4 M4x15mm machine screws and have some sand paper and if you have an M4 tap to clean out the threads that would be good.
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All covered here
http://www.imoc.co.uk/forums/viewtopic. ... light=coil