99 cat C12 is pushing oil into the coolant

I couldn’t put a cob handle on a file so……

 

Only 2 places for the engine to push oil into the coolant, #1 is oil cooler, and it is the culprit 99.9% of the time, #2 its possible with a head gasket issue, but EXTREMELY rare and if it is causing it you will have other noticeable issue as well.
Water pump seal going, puts coolant into the oil, same with a liner or liner o-ring issue, water goes into the oil.

 

I have seen liner cavitation swap oil and coolant both ways. Cooler is more common

 

Not doubting you, but could you explain a scenario where this would be possible? Cavitation is pretty much only going to occur where coolant is, which would also be where compression is. Obviously the most common occurence is cavitation causing compression in the cooling system.

Even if enough oil got by the rings. I can't fathom any measurable amount making it into the cooling system through any circumstance with a liner. But i ain't seen everything either

 

Water pressure 16 PSI blow off, 7 - 10PSI normal vs oil pressure better be 20 PSI at idle, Cat says minimum 10PSI. Oil goes to water in the event of a gasket failure that handles both liquids. Water pump would put coolant into oil.
Wait, sorry, I'm not that smart.....

 

I will offer feedback later this weekend on some theory’s.

Trying to undig from a pile at the moment.

Stay tuned……