Oil in water

[MarderDave]

I'm trying to figure out why I'm getting oil in my radiator 2006 5.9

 

[JR]

Auto trans? Is it engine oil or transmission oil perhaps?

 

[MarderDave]

Engine oil this time, last year it was transmission fluid.

 

[MarderDave]

Engine oil this time, transmission fluid last year

 

[TConver]

blown head gasket, cracked head or block, bad oil cooler.

 

[Mark31]

I had a John Deere 6 cyl 414 cu in irrigation engine with a water to water heat exchanger that got oil in the water. Oh that was expensive to find! Bad oil cooler! We missed it the first time around, and did a heap of other stuff before we rechecked the oil cooler. Barely would ooze under a lot of pressure. A LITTLE oil is like blood---You can take 4 oz of blood and make it look like a chain saw massacre and less than 4 oz of oil will turn everything in the radiator slick and white. If everything runs good, I would bet a Burpsi Cola it is the cooler, especially if the engine is close to stock and hasn't been run hot.