ahhhh found it, dont know if it helps
hope it does.
"Oil Cooler. The Oil cooler on these cars uses a plate and plate heat exchanger. Oil on one side, coolant on the other side. Often the brazing on the cooler can fail and oil and coolant mix together. This is often misdiagnosed as a bad head gasket. To test this remove the coolant hoses and apply air pressure to the oil cooler and watch for leaks. Oil cooler is located above the oil filter."
dont know about the location of it??!! above the oil filter???
