Bimmerfest - BMW Forums - View Single Post - Got the 1.2 bar expansion tank cap from German Auto Solutions
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Old 03-07-2013, 08:23 AM
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doru doru is offline
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Location: Calgary
Join Date: Sep 2007
Posts: 4,703
Mein Auto: 2003 530iA
I think BMW did a mistake with the 2 bar expansion cap, and fixed it on the newer BMW models to 1 bar expansion caps to prabably avoid the catastrophic cooling system failures (ruptured radiator necks, split expansion tanks to name a couple). Pretty much for the same engine (N52 vs M54 - not much different).

Edit: The above statement is wrong. The source I quoted was off.

Last edited by doru; 03-07-2013 at 08:51 AM.
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