Originally posted by markp27
Oops! never heard of this happening.
If the heads are badly damaged, then you'll need to drill the heads out, but you have to be careful and you'll probably need a very hard drill bit.
You drill through the head with a drill bit which has a slightly larger diameter than the screw body itself.
Once you reach the body through the head, the head will simply fall out.
You can then remove your engine and simply unscrew the bodies from the engine block.
Cheers, Mark.
Once it happened to me with my older car ... I did a cut in the head, so i could use a crewdriver to remove the screw...
Used the dremel .. and it worked fine for me ..
Good luck
Rodrigo Meira