Hello, a few months back I bought a '95 Civic DX (1.6L 4door) and just recently (few weeks) I have been seeing some weird cooling issues. It runs just under the halfway mark of the gauge, just the second I hit 60mph it slowly climbs up until I turn the heater on full blast, I have not let it go extremely high, but I don;t know where the top limit is, with the heater on it steadies at about 3/4 of the gauge. Any ideas of the weak point of my cooling system that is causing this so I can at least have a starting point?

-Kris

 

i have a similar problem, but for some reason when i go over 75 mph, for over 15 min the needle starts to go up, havent tried anything, but good luck with u, hope u find the resolution

 

the cheapest thing u can do is replace the thermostat

 

Yeah, I thought it might be the thermostat, either that or the radiator itself, I just would like to take it apart with a good idea in mind as to what it is.

-Kris

 

My temp would creep up on the freeway and it was the thermostat.

 

If your gauge creeps up slowly and turning on the heater helps, you may just have a worn water pump. A new thermostat may improve the symptom initially. The blades/impellars (spell?) of the water pump will erode over time. If the car has ever had dirty rusty looking coolant or only mostly water in it for a long time the pump will go bad. If you are anywhere near time for a timing belt change, do the water pump too.

 

has it been working fine since u changed the thermostat and how long ago was this?

 

Hmm, it didn't look like there were any contaminants when I was messing around the first time, so I will try the thermostat first and see if I see any problems anywhere else. Im still open to suggestions and ideas since I have not done too much with cooling systems in cars.

-Kris

 

It was last summer, I noticed my temp was creeping up on the freeway. I turned on the heater to get the temperature down until I replaced the thermostat. Also, when I replaced the stat, I wentahead and changed out all the coolant hoses. I think there were around 10 hoses that took a couple hours to do.

 

did changing all the coolant hoses help at all? i have a similiar issue and have already replaced therm and water pump.