i've tried all i know there's no water leaks. i've done a block test on it. i was thinking it was the heater core so i bypass it but every two to three days i have to top it off or it will heat up. thanks for your help! oh its a 90 integra with a b18a

Its possible that the water pump has failed or your thermostat is not opening allowing the car to overheat. If it is the water pump the water would drain from the overflow. Usually if its the thermostat, no hot water would make it back to the radiator to be cooled and cause the car to overheat. There would be no water except from a hose bursting from the extreme pressure of the heated water and possibly an intake or head gasket going bad also from the heat and water pressure.

is it leaking? if so i could be a water pump but if its not leaking my suggestions would be thermostat or something clogged in the cooling system i would do a flush just to be on the safe side

well i just added 8 pounds of boost so when i was put on the turbo i changed the head gasket and the intake gasket so i guess well see what happens

do a pressure test.

i did held strong!but still losing water

check the head for possible crack. Also check your heater core.

i bypass the heater core and if the head was crack im thinking there would water in the oil.had a eagle talon over heat on me and crack the head the oil looked like a milkshake!

Maybe the water is leaking in other ways. You should see this to a professional in your place to have some inspection. Maybe there are some cracks that you did not see.

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Refrigerator Water Filter