I have a 2004 WRX STI with out 123,000 miles on it that I purchased about two months ago. The only mod to the vehicle is a HKS High Power catback exhaust. The car is smoking at idle when it warms up. I had originally thought to replace the PCV valve but that has proven to be more difficult than I had originally thought. While pulling the intercooler I noticed oil both in the intercooler and the turbo. This leads me to believe that the seals in the turbo may have gone bad. I am looking for any advice on my issue as well as recommendations for someone to rebuild the turbo.
I also just had the valve cover gaskets and oil cooler seal replaced.