Hi guys,
got a question, looked at a boat yesterday and the below pic is got me wondering what it might be.
the engine is a 454 mag efi with what the guy says got water in the oil.
he says he shut it off and hasn’t done anything with it.
this “material” or “stain” is between the head and the block on both sides middle cylinders both sides.

any ideas what this might be?
thanks.

Looks like block was froze and then JB welded

So cracked block?

If your hot for the boat Price it as it needs a motor and present one not rebuildable.

that would be my guess
water in oil dont spill out the block like that for sure!

Sure looks like JB weld to me with water staining underneath. So yes, definitely cracked block, and being that your getting water in the oil, I would presume that engine is worth no more than scrap metal.

Fubr

Being it is the same on both sides you still think cracked block?
what are the odds of that?
i (just my thinking) was even thinking that the heads were lifted because it’s both sides and 2 center cylinders each side.
if consensus is cracked block then I imagine you guys are most likely correct

My guess, improper winterize at some point froze and busted

Very easily can crack on both sides of the block, as there is water in both sides of the block.