I just put a Zc in my car. I noticed that the engine was running way too cool, so I replaced the thermostat (The old one WAS stuck open). So I drive it around for a while and everything seems fine and dandy, the temp gauge was right where it was for my cx motor. So I was about to get home from the 15 min drive, but then the temp. gauge shot way up to 3/4. So I immmediatly turned off the motor, and pulled over. I started it up and everything was good again. Then I got home and let it sit for about a half-hour before I drove it again. So on the second drive it did it again after about 15 mins, so I turned it off, started it again, and it cooled down. What the heck is goin on???

 

So it hasn't jumped up really high anymore, but the upper radiator hose is EXTREMELY hot, and the lower is only warm. I replaced the fan switch with the thermostat, and the fan hasn't been turning on. I know the fan works casue I juped the plug and it turned on. Anyone got any input???

 

was it Honda OEM part or just a autozone thermostat?

 

It wasn't OEM

 

shoulda did your water pump while you had the motor off. if you take off a rad hose does fluid pump out or does it just kind of set there?

 

did you bleed out the cooling system after replacing the thermostat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jago &raquo;</TD></TR><TR><TD CLASS="quote">did you bleed out the cooling system after replacing the thermostat.</TD></TR></TABLE>

Bingo, it is very likely you have a air bubble or two kicking around.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaHemi &raquo;</TD></TR><TR><TD CLASS="quote">It wasn't OEM</TD></TR></TABLE>

Could be the wrong temperature then, get an OE one.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by old man neri &raquo;</TD></TR><TR><TD CLASS="quote">

Bingo, it is very likely you have a air bubble or two kicking around.

</TD></TR></TABLE>

Yep. Definatly bleed the system before you do anything else.

 

damn bro i had the same crappy *** heating problem i replaced everything on it as u can think of and still would over heat well i just said expletive it and took out the thermostat out now my car runs good and it never over heats even during the hottest day. 100% coolent. yeah i know people say who its not good to run without thermostat because it could send a code to your ecu an open loop which things could suffer but hey i don't have any problems anymore, the only thing is that i have to let it warm up a little longer thats all but no big deal and still runs well.
gl!

 

hey check your fan relay switch connector cap. i had a problem similar to yours and i checked and chaged everything to find out it was the connector cap on the fan realy switch. it had a bad connection. i was told to apply some apoxy on the cap and sitck it back on, should work. good luck. peace
-PinoyCivic

 

pay more and get OEM, bleed the system well and you shouldn't have anymore problems. OEM is more expensive because you know it will work.

 

I took out the thermostat today, and i tested it in hot water and it opens up. I also flushed it when i took out the thrmostat. And let it run with the cap off until all the bubbles came out. But the head still gets really hot, and the intake gets kinda hot also. and the hose coming out of the back of the head seems to be really hot.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DeadEnd9009 &raquo;</TD></TR><TR><TD CLASS="quote">. OEM is more expensive because you know it will work.</TD></TR></TABLE>

More importantly; you know its for the right temperature range.

 

Yeah i checked the temp of the water i heated up. the thermostat started opening at around 170 and was fully open by 190. and my book says it should be fully open by 194