Took out the block today with a friend. Found out what damage has been done.
Not entirely sure what happened. There are possibilities. The oil filter housing might have failed again, but this has happened before And I do have a near OCD trying if it's actually on so I doubt that. Or the oil sump failed to keep the bottom end oiled up due to the cornering(doubtful, but possible) or the bearings just had enough after 32 years and 350k km. At any rate one bearing had spun over and wedged itself around the crank.
The block is OK, the crank is more than likely trash. We can work with this block... there are plans...
First indicator was glitter in the oil. That should not be there. Then we proceeded to remove the engine and dig in to it.
Engine removed.
The bottom end open, the issue is fairly obvious. You can even see the slits of bearing trying to escape.
oil pump has some clear indicators of what happened.
Number 3 cylinder is the problem one. The con rods are properly done, as is the crank from that cylinder.
The rest of the necks had some indicators of damage, that one cylinder is the worst one.
The dome shaped pistons that they only put in the dohc models out for the first time since 1988