Seized RV8 Head Bolt

[Chassis 33]

Folks, currently stripping a RV8 and I've come a cross a real show stopper. The head bolt next to the exhaust port of no 8 cyl is seized solid. I've tried impact driver, air impact wrench, 3/4" drive bar and scaffold pipe and even attempted drilling out the head but I'm just er...polishing the head of the bolt.

Any ideas? I'm trying to avoid heat to avoid warping anything.
Regards
Iain

[Chassis 33]

Cheers folks, finally got the damn thing out using a 15mm impact bit (on what was originally a 16mm head). We used a combination of swearing, distraction methods, bribery and managed to avoid using heat.

Worryingly turned the engine upside down, removed the sump and there's only one bolt holding the oil pickup on, and that was loose by about 5mm. I'm thinking a monkey has been playing with this one in the past. Anyway onwards with the rebuilt and a bit of TLC!

Regards
Iain

[Chassis 33]

I'll be using a stud kit on the rebuild so hopefully it won't be an issue if there ever is a next time.
Regards
Iain

[Chassis 33]

Thanks for the heads up Rev, not considered that...however not an issue with this planned installation.
Regards
Iain