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Old 03-06-2013, 04:33 PM
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doru doru is offline
Officially Welcomed to the 'Fest
Location: Calgary
Join Date: Sep 2007
Posts: 4,692
Mein Auto: 2003 530iA
Got the 1.2 bar expansion tank cap from German Auto Solutions

From Gary (German Auto Solutions). It's a thing of beauty. The top is engraved steel and the relief valve is "Reutter" - the OEM supplier for the OEM expansion cap. The beauty is that "if" the temp is getting too high, it will release the pressure much sooner than the OEM cap, thus having a chance for the plastic parts to last longer. I would venture to affirm that if the cooling parts will rupture due to pressure, at a lower pressure the damage could be smaller, i.e. the crack could be just that: a smaller crack, which could allow you save the engine. At higher pressure, a crack will develop very fast in a big rupture, where one could loose cooolant very quickly.

Thanks Gary. Beautiful product.

Looking for a DIY? Parts? Check this out, it might be your ticket
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