Spat spark plug out @ 4k rpm.

[saxova]

As above, driving home last night at 2 am. Pulls out onto a 50mph road, and gave it a toe through second gear. BANG, no power, sounds like a tank..

Comes to it this morning, and checked plugs, and number 3 comes out with the coilpack.

So today i changed all the plugs.. 30-40 miles later does the same thing. Checked it, number 3 came out with coilpack again..

So the thread in number 3 is funked.

Any personal experience of how to get round this? or suggestions?

So far i've thought of 3;

Re-tap the hole using the next size up of plug available. (but would this be possible with the block in one peice? mate said if tapped, then abit of oil poured into hole, turn engine over... spit the oil (and the shards of metal) out..

or is there any type of heat proof thread tape? like the stuff plumbers use?

or exhaust putty on thread, stick it it, and get a new head/16v when the plugs need changing lol.

Any help would be appreciated,

Brett