Originally Posted by
Toxic
Both head gaskets. They leaked a year apart for me, both on the track. Caught the driver's side in the pits and lost the weekend after 1 session with a modest leak. Second I noticed temp change while on track, came in and found the catch can had a mix of water and oil and it was half full in 1 session. Caught it soon enough both times that the engine was fine but it cut both weekends short. Running a stock set up besides some cooling items from Doug Shelby, nothing like your setup. I know of 4 other cars that needed at least one changed where it showed up at the track and the car went on the trailer.
Changing the gaskets is a pretty straightforward thing, I know I wouldn't be comfortable doing it in the paddock but I bet it'd be no big deal for you.
I agree with O2 and abs sensors too, seen them as well just not on my car (yet).
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