Any idea what this is?
 

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.
https://i.postimg.cc/9fY777tW/IMG-9673.jpg
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.

Ok thx guys.
my next question.

it’s a 1995 454 Mag Efi engine.
looking for another block to swap things over what blocks can I use?
I believe if I read correctly this would be a gen5 block?
do I have to look for another gen5 block or would any year block work as long as it’s a 4 bolt main?
thanks again

You might need more than a block, those heads need to be magniflex'd to check for cracking, Id look for a gen 6 roller long block if it was me

Thx 👍🏼

And likely new manifolds. Unless it was attempted to be winterized but the thermostat never opened up

Yeah I wonder about that.
I turned the engine over but the water pump was not turning.
it’s been freezing cold here for the past few weeks.
guy said he winterized it.

Did you buy it ?

Yeah I did.
but I knew going in it had water in the oil.
got it for a song and a dance.
I actually really needed all the goodies mounted to the engine and outdrive.
I got the whole boat for less than what it would cost me to get a bravo outdrive.
I just needed parts for the most part.
the engine and outdrive will be going into a different boat.

I fixed it for you...

Well yeah.
All the good parts off the engine will go on a different engine.

Not sure what all the gray stuff is (like everyone else said, looks like JB Weld), but this could be a case of seeping head gaskets. I had the same thing happen on my Gen VI 502 blocks. The intakes like to rot out and dump water into the oil, too. Wouldn't hurt to pull it apart and look - you never know, could be rebuildable.

That is the plan.
get the engine on a stand and start pulling it apart.

Like was said, JB weld and cracked block. Also, water in the oil for an extended period equals rusted and pitted internals. The EFI is the old VST are junk as well.