sumplug said:if you know who put them in too tight, then a quick kick in the crutch is advisable. you can heat the head around each plug. i would soak them in penetrating oil overnight, then try to remove them. best way is if they are very tight undoing is to turn one way slightly, then the other. beware though, this can weaken the plug.
jamie86 said:That's the next plan maybe the Mark1 persuading device as well
arseofbox said:Not recommended tbh...theres a possibility you could shatter the ceramic part of the plug, and as the socket grips it, keeping it intact may be an advantage!!
jamie86 said:Is ok Tom that is the VERY last resort will keep plugging away at it
(Ok that was bad )