I have a very slow coolant leak on the passenger side of my EJ257 turbo in the engine area (front). I know it is there because the side of the engine, and the rear suspension components are discolored and have a chalky appearance. This has not happened on the other side. The leak totals about 1 cup of fluid in a track day and when the engine is warm, there is no evidence of any leaking or any drips. When the car cools, it still pulls coolant from the reservoir. I have Wayne's coolant system mod and no issues keeping the car cool.

I was thinking of trying to put a little pressure on the system when cool to see if I could force it to drip. I'd like to do this without introducing any air in the system. I am totally open to suggestions and ideas on how to proceed.