have engine oil in radiator,have replaced oil cooler, have removed head, had itpressure checked resurfaed and valves did . i still have the same problem, it will dump a gallon of oil in 15 minute at idle truck is a97 3500,5 spd. 317000 miles

 

noahr.....did you ever figure out your problem? I just bought a 97 and it just puked oil in the radiator, i was hoping it would just be the cooler.

 

Cracked block....I didn't want to say it but it is possible. Is there any sign of coolant in the oil?

If you can pass a gallon of oil in 15 minutes it is a large opening, small cracks can allow one to pass but not the other.

 

Cracked head or block if your 100% sure its not hg or oil cooler. I've got a cracked block. blown hg and still pushing 60psi for 2+years now and still no oil in rad. Being broke is a *****.

 

Well....i got lucky again. It was my oil cooler gasket, same thing happened on my 91 4 years ago when i bought it. Although it is still a major pain in the a$$ to clean that crap out!

 

Well...i didn't get lucky after all...that baby finally let go all the way, putting coolant in oil. It was the head gasket.