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Old Dec 29, 2015 | 6:10 pm
  #2  
Flyinace2000
 
Join Date: Apr 2010
Location: London (Transplant from EWR)
Programs: United 1k, SPG Plat & Ambassador, ClubCarlson Concierge
Posts: 691
I had a coolant issue on a 5 or 3 series a few months back. Turns out the filler cap was not on completely so the system could not pressurize at operating temperature. I snugged the cap down and was good to go.
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