I have a 2005 Honda civic lx 1.7 I have replaced the thermostat, radiator cap, radiator, all the hoses and clamps. The oil does not look like a milkshake and there is compression when I take the radiator cap off. The reservoir keeps filling up and seems to be blowing out of the reservoir cap. I have to constantly add coolant and lasts 3 days before the temp gauge starts to peak and my air conditioner will not be cold and my heater does not heat up and that's when I usually have to check my coolant? Any ideas? Have not yet check for blown head gasket because it does not stay over heated and I have bled the air out for long periods it keeps acting like air is getting into the system.

If you are sure you bled the air out and followed the Honda procedure for bleeding, there is only one thing left that will cause this and that's a bad head gasket.

Classic signs of a blown head gasket. Be sure to have the head and valves checked by a knowledgeable machine shop, before replacing the head gasket. These situations often develop by not following the procedure in the Owner's Manual on how to properly drain and refill the coolant.