that circle at the top im low on that and it’s the coolant but im confused on what the bottom circle is and if any fluids go in there. i drive a 2012 nissan altima 3.5 liter and much help would be appreciated
that circle at the top im low on that and it’s the coolant but im confused on what the bottom circle is and if any fluids go in there. i drive a 2012 nissan altima 3.5 liter and much help would be appreciated
The bottom circle is the radiator cap. Coolant goes in there too (the same coolant that goes into the top circle reservoir).
The reservoir and radiator are connected, so coolant can flow between them. So normally, you never need to open the radiator cap, you just check the reservoir. But if the reservoir ever gets very low, the radiator might be low too. And it takes a long time (days) for much coolant to flow from the reservoir to the radiator. So it might be a good idea, in your case, to open the radiator cap (but only do this when the engine is cold), just to check the radiator is full to the brim with coolant. And if it isn’t full to the brim, top up the radiator, as well as the reservoir. Then start looking for leaks.