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Old 11-15-2012, 01:56 PM   #11
jfoj
Registered User
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 12,074
My Ride: '06 330CiC, '03 M5
Crazy,

Once car is cold overnight, pull sensor with cap still on expansion tank, vacuum in system will only allow about 1/2 cup of coolant to leak out.

Install replacement O ring you are golden.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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