I got hollow crush washer and put a small amount of dirko and ptfe tape!! I put about a litre of oil in last night and had no leak this morning......if there is still no leak by tonight ill add in the rest and check again in the morning and hopefully get out for a spin !!
It was a mechanic, I think he put it on a lift and just went up thread size. He moved to New Zealand the following week so can't follow up with him and he did it in the garage after hours so can't go back to the garage I think I'll try the crushable washer and some of that heldtite.
It was re-threaded to a bigger thread. It most of been done crooked cause you can see the gap on one side when the plug is screwed in without the washer. It's not much........could you get an oring to seal it? Something able for the heat?
I recently did an oil change on a Bandit 600cc motorbike and when i went to put the plug back on it rung. I got it retreaded but it was done crooked and now leaks.
Its only slightly off but enough for a slow drip. The copper washer was not crimped whole way around.
Would a thicker copper washer...