Jamcousi9

NoEmissions84TA

iTrader: (1)

By "dipstick is dry", do you mean that all the oil is gone? And ended up in the coolant?
I could see ATF getting into the coolant from a leaking trans cooler in the radiator, but you are right, this is a head scratcher.

Maybe use compressed air injected into the engines oil circuit (engine not running) and try to see where it leaks out?

Jamcousi9

Yessir you read it right.. I mean not a drop left on the dipstick, it’s the weirdest dam thing. Checked it again this morning to see if it possibly back-fed in the oil pan but not a drop. It’s got a new radiator in it too as the previous owner though that may have been the culprit

sofakingdom

iTrader: (1)

There are only a few places in the block where pressurized oil comes close to a water jacket. It may have a crack in one of those. That would be extremely weird; don't think I've ever seen it; but we all know how that sort of thing goes.

Can't be heads or head gaskets; no pressurized oil there.

Sounds to me like it's time to start looking for another block.

OrangeBird

iTrader: (1)

Ok , so here's my question with this ;

If the radiator and oil pan were both properly filled with antifreeze and oil , to loose enough oil into the cooling system for none to show on the dipstick would mean the loss of very close to two quarts of oil into the cooling system . This would have to result in nearly two quarts of milky antifreeze being forced into the overflow tank , is this happening here ?

Jamcousi9

I only filled the radiator about 3/4 of the way just in case it did happen this way when I popped the cap I didn’t have a mess all over my garage floor. From what I’m reading up though it sounds like a cracked block, quite possibly weak webbing

NoEmissions84TA

iTrader: (1)

It is not likely to be the block. It is more likely a previous owner incorrectly plumbed something external to the block.
My bet is that someone confused an oil line for a coolant line and has your oil going into the cooling system.

sofakingdom

iTrader: (1)

Thing is, there's no "oil line" anywhere on the motor he has. The "oil cooler" (warmer, really... its purpose is so that when a cop cranks up the car at dawn in the dead of winter and hammers it going after some 10th grade kid with a loud exhaust in an elementary school zone, he doesn't smoke the motor before he gets out of the station) only carries water around. Once that's gone, the ONLY interface between pressurized oil and coolant, is the block.

To be sure, he should make ABSOLUTELY SURE that there are no PO "improvements" lurking about, that could possibly cause the fluid cross. But at the same time, one must be aware of where the opportunities for such a thing are.

NoEmissions84TA

iTrader: (1)

You said a mouthful there!

zman1969

iTrader: (9)

You could always hook a tank of oil and pressurize the block at oil sender with no coolant in block run about a gallon in there and see if you get oil out of the plugs near oil pan (keep in mind the engine oil pan will also fill as oil is pressured into engine) that would confirm what you already suspect -maybe its on one side of engine? to at least narrow down the location. what are your plans for car, build? flip? part? maybe depending on what your plans are you dont want to go any further. good luck

Jamcousi9

Tootie Pang

iTrader: (2)

That's a nice find!

Aviator857

When you ran it did you have the radiator cap on and did the coolant system pressurize? It could be that you hadn't built enough pressure in the coolant to push water into the oil but had enough oil pressure to push into the coolant... long shot though. 2qt though seems like alot of transfer for even a cracked block. Unless it had some major damage. Possible the wrong head gaskets or even heads used that opens a path for the oil to flow into the water? What was the oil pressure while running it?

Though seems like you have an engine solution... If you tear down this one post back that was my main reason for responding I'm curious as to what it is.