Covered here before, I'm sure, but I'm at the point where I'm thinking of getting the oil sump helicoiled.
It gets worse every time I change the oil now and I barely get the plug tight now, PTFE tape doesn't do the trick any more and I'm getting oil on the drive and I can tell exactly which space I use at work too so I can't imagine their that impressed with the state of their block paving

Anyway, my question, for anyone that's used them before, is how difficult is it? I get the idea, that you basically drill out, tap a new thread, wind in the helicoil, but the bit I'm worried about is snapping the tang off. I presume it'll end up rattling around inside the sump? Or is there a way to get it to snap off and fall to it's freedom down the hole?
I've heard nightmare stories of the tang being broken off inside the sump and being sucked into the oil pump and starving the engine of oil etc.
Anyway, MOT time in the next couple of weeks - got to fix the horn (damn thing stopped working just before the weekend, and I miss it

)