Hello, I recently gotten a 2007 Acura TL 3.2, pretty nice car but Im having a issue with the cooling system and any advice from anyone I’d greatly appreciate it.

So I’m always topping off my radiator because the coolant goes into the reservoir tank but doesn’t go back into the radiator. I always have to top off the radiator and it does the same issues all the time. I’ve flushed the system plenty of times, I’ve bleed the system plenty of times, got a new thermostat and a radiator cap, flushed the heater core and I’m still having an issue. I’ve even purposely left the reservoir empty and top off the radiator with coolant and again it fills rhe reservoir up. Any advice on this situation would be amazing because I’ve lost ideas on what to do.

You sure that you don't have a leak somewhere? Maybe the small hose that goes from radiator to the reservoir has crack or is loose, making water go down to reservoir but sucking up air when car is cooling down? If you take the reservoir cap off it also should have a hose attached to it that goes to the bottom of the reservoir. Make sure it's not missing.

I believe I may have a leak somewhere but I checked if their was a on the small hole or anything on the hose that connects the top radiator part to the reservoir cap and the hose seem fine. No signs of any holes or anything and I don’t hear air leaking. I’ll check once again but yes I also do have the the hose that’s attached to the button of the reservoir cap that goes into the tank. That hose also seem fine