hi guys, i ran another compression test on my sr

170-180-180-180

when i put the spark plugs back in, cylinder# 1, when i put the coil plug back in, it wouldnt go all the way down. at first i thought i didnt screw it in properly. i tried another spark plus just to see if the original spark plug was threaded, wasnt that either, same thing happened with that plug.

i found out that the thread (that the spark plug screws into) has popped up.

how bad is this?

will i have to take off the valvetrain to get it??

has this effected or have anything to do with the piston/rings/valves/cylinder walls??

thanks, any information would be greatly appreciated.
Jd