I wouldnt want drill swarf getting in my engine!
neither would I!! but apparently this guy does it in a special way as to avoid it somehow, hence why its 50quid a hole, thou i am not sure what he could do!
the other option would be to get a replacement head i guess, but its all gonna cost, and that tes down south sells refurbed/rebuilt 8v engines for 695, or pick one up cheap somewhere from breakers..
who knows..
Cant see how!
The ONLY way is to drill them out and retap.
neither can i to be honest, and im not that mechanically minded, it is a bit of a tw@t really, and the guy i bought it off was a honda technician, and has spent a fortune on it over his time owning it, but somehow neglected to spark plugs, it wasnt something i thought to check when i bought it, cos i needed a car asap, and this seemed a good buy..
ill get it sorted at somepoint..

however any other old tricks, are welcomed..

i was told to run reddex through it, cos can help clear the build up on the plugs, but like i said to robz last night, i have heard mixed opinions on that treatment...