[JFP in PA]

Originally Posted by Most_Wanted

Thanks Start & JFP. Found the intermix while at work & out of convenience decided to bring it to the nearest google 5 star euro shop. Some backstory... Replaced the center rad because of a small leak. Noticed a bit of oil on inlet/outlet pipes. Kinda brushed it off until i saw the coolant reservoir filled with chunks of oil. Checked the dipstick/oilcap, both were clean, no exhaust smoke either. Still expecting a cracked head but hoping for oil cooler being the issue. Then i bring it to the mechanic and instruct him to drain the oil/filter, both were clean. next check oil cooler and that's when we found the coolant passages were intermixing. Now my mechanic is having difficulty finding the right parts...

Tell him (or her) to go to a dealer, a lot of the aftermarket oil coolers are junk, and you don't want to do this twice. The dealer can also set them up with the four O-rings needed.