Broken drill bit in cylinder head.

ozzy57 said:

A garage advising to drill and tap with the head in situ speaks volumes for THEIR technical ability.
I think the expression is - Name and Shame.

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he didn't say that the garage told him to do it situ though, your just assuming they did

He did say he was told to use grease to catch the swarf so reasonable to assume he was advised to do it in situ. The grease trick is one of those wonderful old techniques that never works properly.
Should get the head off and have a look. If he's lucky a big bit has locked it at TDC and he can clean all the crap out. Then get an engineering company to sort the head and he can put it back together.
Admittedly, there's a fair bit of luck involved but you never know.

StuInHorwich said:

. I'd been advised to try drilling out the old plug so a helicoil tap could be inserted. This was preferable to removing and replacing the head. (Out of my league.)

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My mistake. I read this to mean doing it in situ.

in situ ---without removing head so no need to replace it or refit it

i agree with old school the plugs on cast heads on fords were/are terrible for being arse nippingly tight and they were always skinny plugs too never actually broke any but had to heat gently with a wee jet, as for the guy who wrote this thread it sounds like you have bummed your engine get a mechnic to have a look and confirm its shagit if so you might as well get yourself a haynes manual and strip the engine and do some learning, lesson 1 dont bore out a plug in situ lol

One of the guys on a bike forum I go on had the same problem (spark plug in head), used a reverse thread stud extractor and all was good to go again

What engine does it have in it?

Spark plugs = petrol = 1994 Disco1 = ????

well if you get stuck take the head off and courier it to me at work.we can rework the head and refit all valves etc.New Hg and ya cant go wrong.

pm me for details.