This is mainly aimed at benr, J3ned, Hill power & BB tunning.
I have been told that my sump plug on my williams has worn the thread away on the sump.
The next oil change i have will probally remove whats left of the thread. The garage says they can call a specialist to helicoil a new thread into the sump for £150 (ish)
But how much are new sumps and how easy are they to change. Does the engine need to be raised ?