Oil in radiator

It sounds very much like an oil cooler problem so maybe if you have a good radiator shop near by to have them test it, I,d try that first.The coolant could leak in the oil when it setting so should be no mystery there.

I have been messing around with the oil cooler. I put it in 140 degree water and have a few bubbles every 2-3 seconds. The water is now at 116 and the bubbles have almost stopped. I have 80 lbs air pressure going into the oil side of the cooler. I am assuming this may get worse at higher temperatures and am looking into an aftermarket oil cooler. Does anyone know where to buy used cat parts?

Brian

You could give Cleveland Bros. a call as this # is a Cat used parts store. (814) 342-4210

If you ahve reached 80PSI and 116deg and the 'leak' has stopped, I don't reckon there is much wrong with the oil cooler, there first thing I would check is for a water pump seal leak, is the tell-tale hole blocked?

This is the old style belt drive water pump....not likely your getting cross contamination there.

It sounds like a distinct possibility that there's a head gasket leak. Has the engine been hot recently? .. or has the head been off in recent times? There's always the possibility of a leaking seal or damaged ferrule between the head and block.

The machine supposedly was never overheated but I cannot guarantee it. Looks like I will have to pull the head and look at the gasket.

No points for that, yes it's a D333B, a 40+ year old engine with many places to leak, I would be looking at the head gasket as well.

The D333's and D330's are notorious for overheating and cracking heads and leaking.