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I might have a problem with spark plug port threads in one cylinder, but I'll test fit a plug and see if that's going to be a problem or not - when removing the plugs, that one was stubborn and broke off, but I removed it, just seemed that it might've been a problem with threading, like every turn or so it got to a part where it required more force to unscrew the plug, then it would feel like it was back on the threads again until that same difficult spot.
Has anyone used something like this? Can you do it while the head is still on the block? It won’t get metal into the cylinder? Do you need to install a thread insert after, then install the plug into that? Is M14 x 1.25 the right tool?
I have not had to install a helicoil, but other definitely have. I would try and chase the threads first, sounds like they may be salvage-able. Vaccuum it out of course. There is also one like below that allows you to chase threads on the way out, pulling the debris out as you go. I would try one of those first. Maybe get a couple of different tools, would be cheaper and easier and stronger than a helicoil.
Thanks, I’ll try that. 14mm, right? I might also try chasing the threads with a new spark plug and some oil to see if this is necessary. I don’t know if someone in the past forced a plug in or if it was just difficult to remove because of some build up. Hopefully it won’t be too bad to deal with this. I’ve been dreading it since I pulled the plugs.
I have not had to install a helicoil, but other definitely have. I would try and chase the threads first, sounds like they may be salvage-able. Vaccuum it out of course. There is also one like below that allows you to chase threads on the way out, pulling the debris out as you go. I would try one of those first. Maybe get a couple of different tools, would be cheaper and easier and stronger than a helicoil. https://www.amazon.com/Powerbuilt-64...38&sr=8-8&th=1
This is a very interesting tool. I hope I don't ever need one, but it's good to know it's out there. Thank you for sharing this.
be VERY careful with that tool. Although I thought I was being gentle and slowly applying more torque judiciously, it broke in the spark plug hole. I had made 2-3 passes with light pressure and was progressively adjusting the torque, then it happened and it was a serious gut-check moment.
Cross threaded spark plug port?
