Yes, you most certainly do. If you have no thermostat installed then the engine will take a very long time to reach full operating temperature and may never get to the proper temperature. The thermostat allows the engine to warm up quickly which helps prevent engine wear, reduce engine deposits, and emissions. The thermostat keeps the engine at the proper operating temperature for the best performance and best mileage. Running a modern computer controlled engine without a thermostat is a very bad idea.
because the water pump is not working properly....
See for yourself in this pic for a 95 Honda Civic
no
yes
No, they are not interchangable.
change water pump 95 Honda civic ex
Pcv valve job on 95 civic
Yes I need to diagnos my car
show me how to put breck fluid 95 Honda civic
if the Honda civic dx is a 92-95 then yes.
No, not all parts will fit.
There really is no need to "reset it". on my 95 civic, you push and hold down the H for hours and M for minutes.