coolant in 12v71 oil

[ageless]

blew a coolant hose yesterday, caught the temp rising just as it hit 180. Shut the motor off and was towed in by an excellent Capt Lee and Tim from Tow Boat US Beaufort, NC. Replaced the hose but was reflecting on the possibilities from overheat (although minimal) and my gut told me to check the oil. Really? Dipstick read almost 4" above the full mark. Checked the gear level to ensure I didn't blow a seal under tow but gear level was perfect. Drained the oil and got 4+ gal of other than oil fluids in the beginning of the drain.
Suggestions where I go from here to determine where the intrusion occured

https://youtu.be/p05nfk6hNMU?

[Boatsb]

That's definitely not Detroit oil. At least it's not mixed in and all over the engine.

Drain the rest of the coolant ASAP.

Get some oil in there to protect the parts that are good.

I'd look for a good Detroit guy who has experience with your engines or it may be time for a complete overhaul. It can be a lot of things so

[johnjen50]

Wow. That looks like all coolant and no oil. Yep. Better drain and refill with oil ASAP. Should run it for a minute to circulate the new oil and coat the parts as well.

[Boatsb]

Don't run it it will mix the oil with the fluid and make things worse.

[Briankinley2004]

looks just like fleet charge coolant. wonder if a heat exchanger failed letting the coolant into the oil causing it to over heat. And hose blew as a result?? Seems like it would be more than a blown hose to cause coolant to get into oil

[MVCaprice]

looks just like fleet charge coolant. wonder if a heat exchanger failed letting the coolant into the oil causing it to over heat. And hose blew as a result?? Seems like it would be more than a blown hose to cause coolant to get into oil

If an oil cooler core deteriorated and was leaking that could cause it, but I don't think main HE's are anywhere connected to the oil at least they are not on our 12-71's.

[ageless]

looks just like fleet charge coolant. wonder if a heat exchanger failed letting the coolant into the oil causing it to over heat. And hose blew as a result?? Seems like it would be more than a blown hose to cause coolant to get into oil

if the overheat caused a head gasket to go or a head to crack the fluid could easily get into the oil

[ageless]

Don't run it it will mix the oil with the fluid and make things worse.

no worries, I'm not starting it. I've emptied the oil pan and filled with fresh oil, drained all the coolant, as well.

Call into mechanic but would like some idea where I might start to find the cause of intrusion

[dsharp]

There isn’t a head gasket. It probably got hotter than 180 and cooked the rubber seals between the head and the block. Pressure up the cooling up system and see if it leaks down rather rapidly. It likely won’t hold pressure. If you have to pull the heads check for cracks around the valves.

[ageless]

Wow. That looks like all coolant and no oil. Yep. Better drain and refill with oil ASAP. Should run it for a minute to circulate the new oil and coat the parts as well.

The first 4+ gallons that pumped out were in fact coolant, then 9 gallons of oil followed.