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Old 03-25-2013, 06:51 PM
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gary@germanautosolutions gary@germanautosolutions is offline
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Location: Grand Rapids, Michigan
 
Join Date: Jul 2010
Posts: 288
Mein Auto: 528-530 Hybrid, Duc. 748
Quote:
So, I ask: Does the GAS 1.2 bar cap (or the original 2-bar cap) have such a check valve?
Yes, The G.A.S. 1.2 bar cap uses all brand new BMW internal components that have been recalibrate to vent at 1.2 bar, and the OEM cap has a negative pressure check valve that opens during cool down if the cooling system pressure drops below atmospheric.

Gary
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