1967david

radiator full of oil think its the oil cooler i have a 1992 12 valve

rrgrassi

Sounds more like a head gasket. But...How many miles on the truck? Does the oil have water in it as well?

Automatic or manual transmission? There is a trans cooler mounted on the engine, and not in the radiator.

oliver foster

I have seen an oil cooler get holes in it and bubble oil into the coolant.
The guy replace 3 head gaskets before pulling the oil cooler, and testing it in a bucket of water with a little air pressure.
It bubbled away showing him the problem.
I had a spare on a Sunday afternoon, and he was back to work on Mon.
The head gasket is more likely, but those coolers DO go bad occasionally.

1967david

pulled oil cooler sure enough it was leaking its a 1992 d350 with 89000 miles on it

thrashingcows

Probably not running the right mix on anti-freeze. Or the water in your area has a lot of heavy minerals and stuff in it that react negatively with the metals in the block and other accessories.

I would run distilled water from the grocery store. Then you know you have nice neutral water in there.

funcruise

I have a dehumidifier in the basement so would the water it produces from the damp air be the same as distilled?

maybe368

Can I make a suggestion? ...Mark

j_martin