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Old 10-04-2012, 10:51 AM   #19
LeMansteve
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Join Date: Nov 2008
Location: USA - GA
Posts: 1,813
My Ride: '04 330i 6mt ZSP ZPP
Quote:
Originally Posted by bryce-o View Post
the cooling system is presurized to 2-bar from the factory from BMW. a 1-bar cooling system will theoretically provide more reliable cooling system performance.
Good luck with your trials but initially I'm skeptical. If it's really that easy, why wouln't BMW do it in the first place? I agree with what bryce-o said. A 43-degree reduction in the boiling point is massive:

Quote:
Originally Posted by fiveightandten View Post
A 1 bar cap will lower the boiling point of the coolant by about 43 F if i'm doing the math right. That's a big jump. You may throw things out of the range of expected inputs from the ECT sensor and other elements and cause issues.
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