Third Expansion Tank in three months

[saaber]

Originally Posted by mightysquirrel

Sure we drive the car harder than most, but we don't abuse it or bounce it off curbs. That's why we have Porsche's.

So I'm just curious, has anyone else seen this sort of issue with these &%$)@#! expansion tanks?

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What is the hottest temp your car runs at? I was just thinking that after I pressure washed my radiators from the outside the temp dropped about 7-10 degrees in all conditions and stayed much more steady than before. I did this a few weeks after I changed my tank.

I think it is the heat cycle that kills these tanks. I have a strong suspicion that lowering the peaks (via washing radiators or?) and raising the valleys (via garaging when cold, plug in heater?, other?) of that cycle would make a big difference in the longevity of the tank. It is just a theory though and I have no real world evidence to back it up.