maybe ur headgasket also check all your hoses
Have you checked the FIRST things to check like, thermostat, temp sensor, rad fan?
Hey, a couple years back, I owned a 94 ej coupe with the same issue. I had the stock d16z6 in it. i would constantly add coolant to it. However, the problem was that it would still get hot. The fact I constantly had to fill it up was an instant sign that it was leaking but I never found any puddles. If this is your case, I have heard many ppl say to check that it's not leaking into your heater core. I have never tried this, but its something you could try if your problem is leakage.Also make sure your fan is turning on. That would be another thing. So check thermostat, thermo sensor,cooling fan, and make sure you have enough fluid, bleed air...
Do you have any leaks...check engine light?.. the more specific information you provide the more help you will get,so people dont jump right to the most expensive and usually wrong solutions.