Dave
While you were involved with your discoveries on heat reduction, my car was being serviced by a local specialist. I mentioned to him that I could detect a sweet smell from the front of the car after a run. This consistant with a small fall in water in the header tank. The likehood is a leak in coolant which is evapourating on the engine, hence the smell.
I have now ordered your "tapioca".
I am hoping your leak has remained in check and the stuff looks a good bet to solve my problem
