So how much can you cook an engine?

[pgkevet]

I'm usually pretty paranoid about my engines (it's a gasser flier thing)..but must have been asleep yesterday 'cos I missed the warning sign and my .91 seized.. which justified all the auto practices the week before - that bit was really nice and satisfying.

But I;d cooked it so hot it was still crackling for a solid 5 minutes.

OK so most of it is toast and a new one <sigh> ordered.

Obviouly the caerb can be salvaged, What I can see of the liner actually looks OK..but it might not once I've released the jammed piston.. that's got the classic hole and sintered edges. No obvious debris plugged into the cooling head..just scorched.

The question really is whether at that sort of heat the casting will have distorted or weakened, looks like a colour change on the back of the crank too. Is it worth cleaning up the cooling head, crank and tossing the bearings and salvaging the casting as spares??

I assume the conrod may have been stretched/stressed and is toast as well?

[busybody flyer]

Alluminium castings are unfortunately prone to distortion when over heated to the degree of of discolourisation. The distortion is not always visible but you can get the casting crack detected with a local engineering firm. My guess is, when trying to rebuild the engine with new parts there will probably be an number of issues with tight spots. I hope this helps???

[pgkevet]

Alluminium castings are unfortunately prone to distortion when over heated to the degree of of discolourisation. The distortion is not always visible but you can get the casting crack detected with a local engineering firm. My guess is, when trying to rebuild the engine with new parts there will probably be an number of issues with tight spots. I hope this helps???

..sort of what I figured.. toast.. and probably not worth the salvage for issues down the line..new engine arrives tomorrow