So the past couple of weeks my car has been acting weird. One day I was getting on the interstate and it just started climbing up in temp. So I instantly turned it off and pulled over. I turned the key over to show me the temp and it said normal. When I started it back the temp started to climb again. My distributor leaks a little bit of oil so I figured the sensor had oil on it and was making it read weird. So I get out and spray it off and start the car and it works fine, no overheating. I drive on down the interstate and meet my buddy who works at napa. I get a thermostate to replace it just in case. So I drive the car like 200 miles a day on for the next week and it never overheats once. Now I go home last weekend and it starts acting all weird again. The gauge will go up and down and dance all over. If you make certain turns really fast it goes up, when you go the opposite turn it goes down again. So I replace the thermostate and everything is cool. Then it did it again the other day and I have no idea what is making it do it. It's not shooting out water and none of the plugs seem to have anything on them, they all look good. Also, the car doesn't smoke after letting it sit and starting it back up. Oh, and this never started until I took out my radiator and tightened up the bottom hose. Sorry for the long question but this is bugging me to death.

 

Did you bleed ALL of the air out of the system?

 

I think so. I don't have a bleed screw on mine so I didn't know how to do it.

 

Jack the front end of the car up, let the car run without the radiator cap on till all of the air bubbles stop coming.

I pretty much guarantee that is your problem. Air in the system is the number one cause for over-heating.

 

I use to have the same problem. All of a sudden the gauge would just rapidly shoot up. I replaced everything you did. Come to find out, the car was never even overheating. The ground wire that connects to the valve cver had came undone. Make sure all your wires go to the right places under the hood.

after I learned that it was that wire I unhooked it again. The temp gauge pulsed when I had the turn signal on as well without that wire.

 

ive been having the same problem im starting to think its the temp sensor for the guage that is the front right of the head just behind the header, cause my guage shoots up and down like no tommorow so im gonna change the temp sensor, cause i have new rad, tsat, rad switch....wat a mess lol

 

Thanks for the help guys. I ended up just cutting the old thermostat and putting it in there for now. DenzComp, I know what your talking about. Mine goes up when I turn my lights off, weird. Well I bleed it out and I haven't had any trouble out of it since. I'm going to put in a honda thermostat here soon and see what happens with that.

 

you dont have a bleed screw off of your top radiator hose? you must not have a honda

 

i have 2 crxs that do this. one is totally built with a new everything and the other one is old bone stock. if you turn and get on it the temp gauge goes up.

 

Do you have access to a raytech gun? When the gauge syas you are overheating pount the gun at your thermo housing and see what the actual temp is.