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Old 03-09-2013, 06:00 PM
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champaign777 champaign777 is offline
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Location: Champ
Join Date: Nov 2009
Posts: 2,069
Mein Auto: 2003 530 Sport Twins
Originally Posted by doru View Post
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.
thats right , E60 has 2 bar expansion cap but their coolant system does not fail like E39
The only complains about WP , all the rest last > 100k miles easy
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