I am changing plugs on my 2002 Dyna lowrider,,,by the sound of the crunch I think the plug is coming apart in the hole . Any suggestions

 

Spraysome WD40, let it sit for a while and try again. If it's only the ceramics that broke, no big deal. Make sure you have the right sized nut

 

WD-40 didnt help. The plug is coming apart below the nut. The plug was over tihtened. Anything left to do besides take it to the dealer

 

wow sorry to hear that

who put the plugs in?

if it was the dealer, i would take the bike to him....and in front of the service manager get a torque reading for how tight the other one is.....to prove your argument.

And there should be copper grease (anti seize) on them too. Basic, basic

Ifit was you......Swallow it, live and learn,and take it to the dealer. OR beter still, if you are handy with the spanners, or have friends who are, remove the head yourself and save $$$$$$ on labour. And of course, you are going to have to trace every piece of broken plug

Good luck