My home inspection of Speedmaster heads
According to 318's photo, the thread end of the plugs terminate very close to the short side of the threads. I think cleaning the exposed thread area is the way to go. The angle of the plug is the cause of the issue.
According to 318's photo, the thread end of the plugs terminate very close to the short side of the threads. I think cleaning the exposed thread area is the way to go. The angle of the plug is the cause of the issue.