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I've changed hundreds of spark plugs over the years.
I was going to change the plugs in my 3.0 BMW and did the first 5 but as I got to the front of the engine the plug in cyl-1 was very stiff.
I decided best to leave it as it was so stiff trying to unscrew it. It will unscrew a turn or two before the resistance in the wrench seems too much.
Has anyone else come across this sort of problem and what did you do?
I could just throw caution to the wind and unscrew it. But I'm having nightmare visions of the plug hole getting stripped and it then being impossible to put the replacement plug back in. Either from the thread being too mangled to accept the plug or with it being so stripped that the plug won't stay in the head.
However... there is the possibility as well that the plug being tougher than the thread it may just cut a nice thread on the way out and everything will be fine.
I tried heating the engine up and removing the plug after a high speed run but it seems just as stuck. I still think it would be best to remove it from the engine when it is hot as everything will be softer so less chance of breaking something.
I was going to change the plugs in my 3.0 BMW and did the first 5 but as I got to the front of the engine the plug in cyl-1 was very stiff.
I decided best to leave it as it was so stiff trying to unscrew it. It will unscrew a turn or two before the resistance in the wrench seems too much.
Has anyone else come across this sort of problem and what did you do?
I could just throw caution to the wind and unscrew it. But I'm having nightmare visions of the plug hole getting stripped and it then being impossible to put the replacement plug back in. Either from the thread being too mangled to accept the plug or with it being so stripped that the plug won't stay in the head.
However... there is the possibility as well that the plug being tougher than the thread it may just cut a nice thread on the way out and everything will be fine.
I tried heating the engine up and removing the plug after a high speed run but it seems just as stuck. I still think it would be best to remove it from the engine when it is hot as everything will be softer so less chance of breaking something.
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