[speeder]

I read an interesting but scary story in the book of 356 Registry articles about a mysteriously over-heating engine that turned-out to have a major blockage in the oil cooler. It did not leak, (the usual way that oil coolers fail), and oil still flowed through 1/2 the cooler. The car was fine in normal driving but on a long summer journey, it over-cooked.

We have the latest/greatest 912 cooler on this engine and it looks fairly new-ish but I went nuts cleaning and testing it after reading that article. I could not find the exact capacity of the thing in any literature but that did not stop me from cc'ing it anyways and doing some strange procedures with it. First was cleaning it, very straight-forward:



Then, I cc'ed it with clean solvent and rinsed several times alternating with compressed air in both flush directions. Finally, I set it upside down for several days with clean solvent to the very brim to see if it went down any. If there was an oil clot in it, the solvent would at least permeate it over time and go down in level slightly. It never moved one beaver hair.