I was doing my yearly maintenence on my 4hp mower (sparkplug, air filter, oil). I drained the oil and when i put the plug back in and i put teflon tape on it because it was on the plug when i took it out. when i Put it back in i went around it twice with telflon tape and started tightening it, after goin about half way in i heard a snap took the plug out the find a hairline crack about 1cm-2cm long starting from where the plug goes in. I put the plug back in with no tape and there seems to be no leaks. Should i buy some jb weld and put alitte bit up the crack becasue its not that big of a crack to go and by a new pan,, thanks