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      10-10-2019, 11:10 AM   #3
tracer bullet
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Drives: '11 135i , '15 X3 35i
Join Date: May 2011
Location: Saint Paul, MN

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Quote:
Originally Posted by Wgosma View Post
Entrapped air in coolant can cause intermittent overheat.
Totally agreed. Not just because air is int he system instead of coolant (air wont' conduct heat away nearly as well) but also because when those air pockets hit the temperature sensors it can really make them go nuts (a much higher temperature for that air pocket than for the coolant itself).
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