one of my plugs took a shit today it's been acting funny for 2 days now.so i changed them out.and a few months ago when i got the compression gauge stuck in cly 4 the new plug then went it snug well pulled it out and have metal shaving on it.so the new one today went in pretty shitty too so now i hope the cly wont shit out on me by stripping it out every time i need to do a set of plugs.