Could that be the reason two of my glowplugs will fully loosen, yet still I cant remove them?

 

probbly. u can try one method, loosen the glow plug all the way, unhook the power to IP and crank it over. should shoot plug out. makesure u have heavy rag or blanket over it.

could also be carbon build up. once loose, spray some pb blaster down the hoel to try and loosen some of the carbon.

 

what i did with mine was put an air ratchet on it with a deep socket and just keep it spinning it with slight upward pressure and plenty of lubrication