water in oil figure this one out....!!

[jasonsnova]

ok heres the story, last summer i had the short block rebuilt on my boat (3.0) it had a cracked cylinder so it was sleeved bored .040 over new every thing ...i put it all together and ran it july-sept 1st zero problems, 3rd week of september i went to winterize and upon warming it up it started spewing milky oil out the breather ...full of water! so i flushed it several times and winterized it.. so after think all winter about it the only things that were not rebuilt were the head and manifold....seeing how i put 40+ hrs on it i figured must be the manifold or elbow gasket...so last week i replaced the manifold checked the elbow , started it tonight and after 1/2-45 min oil turned milky! WTF!! so being totaLLY PISSED OFFF i pull the head tonight....it was fireing perfect i cant see any cracks, in the block or head, no signs of headgasket leaks....nothing! it makes no sense! only thing i can think of is have the head magnafluxed and checked to make sure.....
anyone have any ideas ? i'm a bit stumped!
funny thing is even before i had it sleeved and bored it never leaked water into the oil ( wirst pins locked up and was knocking) ....
i really could use some ideas! Thanks!

 

[Juniinc]

Re: water in oil figure this one out....!!

When U pull the head this time, did U see any water on the top of the cylinder?
I would get that head pressure tested.

 

[jasonsnova]

Re: water in oil figure this one out....!!

when i pulled the head there was no water on top of the pistons, only thing i can thing is maybe...it has a crack in a coolant port in the head and is draining into the engine and not going into the cylinders, because it ran perfect...cylinders look perfect....i'm stumped

 

[boat127]

Re: water in oil figure this one out....!!

im thinking you have a cracked water jacket. how cold did it get in september before you wnterized it? you could do a leak down test thats where i would start

 

[jasonsnova]

Re: water in oil figure this one out....!!

it didnt freeze before i winterized it...i'm 100% sure of that. i'm baffled , i'm gonna drop the head off today to have it checked....

 

[Bondo]

Re: water in oil figure this one out....!!

WTF!! so being totaLLY PISSED OFFF i pull the head tonight...

Ayuh,... Woulda been nice if you'd done some Diagnosis before you pull it down...

My Guess is, the Block,+ Not the Head is where the Problem is...
A Pressure Test woulda been easier with the head still on it...

 

[jasonsnova]

Re: water in oil figure this one out....!!

ya i thought about the pressure test after i tore the head off...just talked to the machine shop that did the block work he thinks its the head...he said he's had a bunch of these 3.0's that have cracked under the valve springs...i hope so.....i'm gonna be some pissed if its the lower end!