Anyone encountered this? I redid the head gaskets last year, car runs great. It's a 99 4.0 Gems with 195k miles. Took it to my mechanic to install new coil packs, wires and a set of plugs. He said the 2 front pass. side plugs are jammed. Asked if I had put anti-seize on them when did the head job - I didn't. I can live with the plugs in there now until the car dies, but would like to update them if possible. Should I try to force the plugs out? My mechanic was too scared as it's aluminium block and could end up with a dead car. Anyone had this? Suggestions? Thanks, Kevin in Minneapolis.
kevin@dokdoc.com is better for responses.

 

you put the plugs in so only you know if they didnt quite go in right.
if you had no problem with then going in.
i would spray the plugs with some PBBlaster a few nights when the engine is hot.
then go after them with a breaker bar when the motor is stone cold.

a very common problem with aluminum head when anti-seize is not used.
you could in theory pull all the threads from the head when removing the frozen plugs.

 

When I got my 2003 it had a plug that did the same thing. I just wrenched it out, and got lucky. The ceramic snapped off and I had to chase the threads, but I didn't have to helicoil the hole or anything.

 

I think I'll just leave them alone, as my mechanic recommends. He said "You can try it but you could easily end up with a dead car."

 

Dead.... for now. absolute worse case would be pulling the head. It's something you'll have to address eventually, but maybe not today.