The car is heating up to about 3/4 on the temp gauge.

It blew the upper radiator hose about 9 months ago. Since then it started acting up. I have replaced four sensors/switches(ECT SWITCH A and B, ECT SENSOR and ECT Gauge Sending Unit) plus the fan relay. After this it continued heating up. The radiator heated up so bad it melted around the cap and part of the reservoir melted too. Replaced the radiator, cap, reservoir and all of its parts.

The fans seem to function the way they are suppose to. It never heats up to the point of steaming and having to pull over. I have noticed it uses coolant and if you add coolant it runs good. But a couple of days later it is low and starts to heat up again.

 

Try replacing replacing the thermostat with a stock temp unit.

 

Did you do the work yourself? Have you tried to bleed the system? The bleeder valve is located next to the thermostat. You might have air in the cooling system. You will need to top off the radiator and open the valve while it's running. Look for the bubbles to minimize from the filler neck of the radiator. Good luck.

 

Yeah, should of mentioned this. I also replaced the thermostat, added coolant of course when I replaced the radiator and bleed the system according to the Honda service manual. Here's an idea...

What about taking out the thermostat and seeing if the problem still exists. If it does then would that point in the direction of a water pump not quite working the way it should? It has 160k mi on it and was thinking about replacing the timing belt and H20 pump.

 

Wow...that is like two in three months...very good.

 

If I was a betting man I would say you have a blown head gasket.