i just replace a new thermostat in my car and my car now is over heating..my old one that was on the car was bad..that my temperture was alway very low!!!so i replace it with the new one.....my fan still kick in to..but still over heating..so let me get some advice from you guys...

 

Blocked airflow? Aftermarket/stock rad?

 

block airflow??? and yea i have a aftermarket rad...

 

Full size? Half rad?

Did you burb and fill the system properly?

Are both of your hoses warm at operating temp? One or the other?

 

Yes. Is anything blocking the airflow?

 

Are there any bubbles coming from the rad.?

 

rad half size..and hole on top very hot and holes at the bottom is cold...

 

Aftermarket fan? Shroud?

 

Could mean your new thermostat isn't opening.

What kind is it? Oem? Parts store replacement?

 

yea theres bubble coming from to top rad cap..when i fill the rad when i got done putting the new thermostat in...

 

yeah, i think it is cause my buddy and them said for me to take it back and get a new one (autozone)

 

There's your problem. I've used two autozone t-stats in my EF before and they both did this to me. Go get you a Honda t-stat.

 

did you install it backwards?

the big end of the thermostat should face the engine and the small end should face the rad hose

if you installed it backwards, the wax pellet in the stat will read the colder coolant outside the engine and not the boiling coolant inside the engine and will never open up to let coolant flow

 

i install it right...i look at the one that was on it b4 i took it out to make sure it right..

 

you mean the actual one from honda.....

 

ok i check everthinng but now when im driving around town it seam to be at normal temp..but when im on hwy it gose on high temp...and my s300 pop up code overheating...