My 1994 acrua Legend is overheating! =(

Both fans are working perfectly as intended. Forgot to include that.

Interior carpets are fine and the heater core is sealed up tight. Didnt notice any leaks from it. I'll have to get a pressure test done. Another possibility is that the engine overheats when the thermostat fails to open completely and I've just been adding excess amounts of anti-freeze? I'm an armature mechanic at best lol. Completely baffled with this.

Chemical test to detect carbon / emissions. It came back clean. The recovery tank seems to stay the same but when the car overheats the radiator's basin is low on fluids. Or so I think, unless I've been over-filling it? Doubtful though. I appreciate the help! Thanks so much.

Minimal driving time. I drive to college. Maybe a 40mile round trip doing 55-60 top speeds. The radiator itself is losing coolant then. It has been doing this for maybe a week. The radiator fluid doesn't have oil and the oil doesn't have water / coolant. I checked both.

This is maybe 4x a week. I never go long distances. I used to drive it pretty far but lately its been having issues. It has never redlined or overheated. I always pull over / turn the heat on to cool the engine.

I just did it this morning actually because I'm completely baffled. An interesting thing happened actually. I totally forgot about this until now but this is what made me thing it was the thermometer not opening completely. I had drained 3 inches of radiator fluid as the test says. I left the cap off and placed the chemical tester where my radiator cap should be. About a minute into it the radiator fluid started overflowing into the test tube. I assumed the thermometer hadn't opened completely and if this had been happening on the road the fluid would have drained as I drove. I turned my car off, drained an inch more of fluid and reset the tube. I ran my car for two more minutes and it tested clean. (Temperatures were perfectly fine throughout these tests I made sure to monitor them.) Thus the fluid hadn't boiled over.

Two days ago I completely bled my system and replaced my coolant completely. I wanted to start fresh and see how much I had lost and it was around a quart in two days.

Only other possibility I can think of would be head gasket? I'll still be replacing the thermostat tomorrow just because I have no clue the last time it was done. I figured if it was the head gasket I would have issues like loss of oil, oil in the radiator, water in the oil, ect. My car has none of these and passed a chemical test. I may take it into a dealership and get it diagnosed? I'm not sure where else to check =/

Okay I will do this tomorrow and I'll completely monitor the levels in the recovery tank / radiator. After ill let you know what I find. Thanks again!

Bled the lines and DID find air. Did another combustion test and had a friend do a leak down test. Both came back normal and did not find results of head gasket failure. I recently replaced my radiator cap and AUTOZONE sold me an unmarked radiator cap ( didnt specify the PSI) I pressure tested my radiator and its 16 PSI. I then tested the cap and its 13 PSI. Pretty sure I found my problem right there >.>

Lets just start over because the cap isn't the problem :(.

There is no dripping whatsoever, no fluid out of the exhaust, and the fans are running perfectly. I installed my own mechanical gauge to ensure the car was in fact overheating. Since then I haven't had my car overheat (two weeks. I haven't added coolant in 600 miles so far.). I check my reservoir every night after work and it's been depleting quickly. After the past 600 miles the reservoir down to the min level and I'm getting worried. I have done a combustion test ( this tests the coolant for carbon deposits / c02 emissions in the coolant. Basically an easy test for a BHG. ) And I also did a pressure test and both didn't come back with any results. After these tests I just went ahead and replaced the thermostat with an OEM thermostat. My car usually runs around 190 degrees and has not exceeded 210 degrees. I noticed something that made me think its a weeping water pump. When I sit at a red light or a few red lights in a row my temp goes up to 205 or 210 degrees but does not exceed this temperature. After I start driving the car cools itself back to 190 degrees.

This sounds like fans but I have tested them and they are perfectly fine. Fans wouldn't explain my coolant loss if the temperature does not exceed 210 degrees the coolant cannot boil out because the temperature is too low.(1.1 bar cap + 50/50 mix). My car runs flawless other than this loss of coolant. Doesn't sound like a BHG when it runs and there were no carbon deposits / c02 gasses in the radiator fluid.

Thanks for reading and I'd appreciate it if anyone could shed light on what I should do / replace next! I have replaced a lot thus far and hope I can pinpoint this soon!

/edit: Also oil is clean and does not contain coolant or water and same goes for the coolant. Coolant is clean and does not contain oil. I have changed my oil within the past week and it was pristine. Also the oil levels are consistent and do not ever decrease. I am very particular on fluid upkeep and keeping an eye on my system.