Radiator

Asked by GuruLB8QK Apr 04, 2019 at 01:49 PM about the 2014 Nissan Altima 2.5 SV

Question type: Maintenance & Repair

Hi,

I had a question regarding a 2014 Nissan Altima- is the coolant that is inside the radiator ( the one underneath the cap- not the reservoir on the side) is that coolant supposed to maintain itself at a higher level when the car is off? Or when the car starts up does the radiator suction the coolant from the reservoir and that is the process? If you could please advise.

1 Answer
26,760

oilyspill answered 5 years ago

I can talk in general terms. When you kill the engine, when it starts cooling, it creates a vacuum in the cooling system, the vacuum pulls coolant from the reservoir to help keep the radiator full. The cooling system has to be sealed in order to produce vacuum. No vacuum, it will not pull coolant from the reservoir. So the coolant in the radiator goes down and the reservoir stays full. If radiator has a cap, cool engine, I remove the cap and check coolant in radiator as well as reservoir. I can't see your vehicle, so what I posted is generic info.

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