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Discussion Starter · #1 ·
Hello πŸ™‚
Is it normal that there is no preassure in coolant reservuar when car sits over night?

But when car runs or it sits with engine off for couple of hours there is preassure.

Sorry for stupid question πŸ˜„

Everything works, car is not overheating. I'm just curious πŸ™‚
 

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As long as the car is not losing coolant, I would not be concerned about it. My car keeps a little pressure if I open the coolant bottle early in the morning. By the afternoon the pressure would be gone though.
 
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