Tenman
Well-Known Member
If it was torqued to specs cross threaded. The head has to come off.
Those might work after knocking the porcelain completely out. I just wouldn’t feel good about pieces of porcelain in the combustion chamber.This is a long shot, but before pulling off the head, I would try something like these pipe nipple extractors. Maybe one would be the right size to grab enough metal to spin it out. You may have to do some grinding on the extractor to make it fit. It's hard to tell in your picture how deep that threaded part of the plug is.
https://www.homedepot.com/p/Husky-6-Piece-Pipe-Nipple-Extractor-Set-80-533-111/304341668?MERCH=REC-_-pipsem-_-NA-_-304341668-_-N
Good luck.
I agree. I was looking at that lip outside of the porcelain. There may be enough material there for the extractor to bite into. As mentioned, with the hex broken off, what's left of the plug shouldn't be very tight.Those might work after knocking the porcelain completely out. I just wouldn’t feel good about pieces of porcelain in the combustion chamber.
You might be able to get to it with the valve cover off too.Since it broke in the threaded area, it might not take a large amount of twisting force to unscrew it. There is no clamping torque to overcome. Only the likely thread deformation, and carbon that may be built up on exposed threads in the head. It should be no where near what you need to unscrew a normal spark plug. I'd cram a screw driver in there and see if it will twist a little. If it moves at all like that, then you can figure out how to capture the fragments and hold on to it as you unscrew it.
I wonder if the engine needs to be pulled to get the head out.3k is absolutely ridiculous fee to do that. pull the head clean up head,piston and ring area, install head. I would be finding a different shop if I couldn't do it myself.
When my head came off for the CCT failure and repair the shop pulled the engine out of the bike. No idea if that was because they wanted to inspect the bottom end or if it was just easier to get the head off that way.I wonder if the engine needs to be pulled to get the head out.
Yup. That's the consensus.Did I miss something? I don't see any indication of cross threading. It seems to me like the plug was defective, and likely broke while being installed.