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Old 08-04-2013, 12:56 PM
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gary@germanautosolutions gary@germanautosolutions is offline
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Location: Grand Rapids, Michigan
Join Date: Jul 2010
Posts: 425
Mein Auto: E39 528i, E60 M5
I just saw this discussion today and thought of an earlier post JimLev made about a 1.2 bar cap possibly presenting "a problem with the tu motors running at 108C on very hot days".
We removed the manual clutch fan and disconnected the aux fans and tested both an M52 and M54 engine in real time while monitoring system pressures and temperatures up to full overheat temperatures (Gage pegged on full hot and dash warning displaying) and the system never exceeded 1.2 bar of pressure until temperatures exceeding 125 deg C.


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