Hey guys I have a stock 94 civic ex 1.6 vtec and I just changed the radiator and I get temp at the guage while at idle but once I drive the car the temp drops all the way down to cold and it has luke warm air. I have tryed bleeding it 2 times and don't get any air bubbles. The way I did it was after putting in the radiator I then filled it up with antifreeze then started it and let it run for a while then drove it then tryed the bleeder screw. Did I do something wrong or what should I try now? I also put a new upper hose on it while I was into it. Thanks in advance guys!!!

 

thermostate stuck open, or too cool a thermostate.

 

But it was working just fine until I changed the radiator. Would that cause a t-stat to go bad? Just never seen a car loose temp while driving,it's usually the other way around. The haynes manual says to start the car with an empty radiator and crack the bleeder valve then fill the radiator. I filled the radiator 1st then started the car but didn't crack the bleeder till after I drove the car. Just wonder if Ive filled it wrong or something. I know this has to be something little and simple lol. Thanks!!

 

Just installed a new t-stat and that sure as hell solved the problem. Kinda weird really!

 

if your car does not have a hesitation on acceleration, the bleeder may not have to be done. If all runs well, leave it be. Good on t-stat.