I thought I'd be sneaky here, if the thread is slightly 'worn' then I should (in theory) be able to plug the gap using a slightly larger plug.
Alas I didn't have one so I used some Chemical Metal to 'fill in' some of the thread on a plug. Sounds stupid I know but it worked quite well. Put some on the thread and using a piece of paper towel just rotate the plug and spread it through the thread. Then use a tooth brush while its still wet and make it a nice thin coat.
Went out to the car and started to screw it in and as I thought it was quite tight, so much so that I took it out and wore a little more away and carried on until it was good
Got the plug in and....
still did it
Was actually getting dishartened with the car a bit this week and my mind wondered to other cars but there is so little to fix on it really that I'm going to stick with it. Driving it around tonight even with its problem was still great fun
So, what are my options? As I see it there are two
- Take the head off and replace it (plus maybe some head work)
- Re-thread the spark plug hole
The 2nd option is obviously cheaper but does it involve taking the head off? Surley it does and if its coming off I might as well get another one with some work done.
I'm not really in any great hurry, the car will drive to work OK venting out the HT lead and i could build a head up (or get one built up) and swap it in a weekend.
Any help or ideas welcome, bear in mind I'll be going to be in an hour and won't be on MIG for a month lmao