just got my car back from the bodyshop and its overheating. temp gauge just goes right to the end almost and i have to pull over every 5mins to let it cool down.
iv had overheating problems before where the temp would go back down if you're driving but the gauge just keeps going higher and higher.
anyone know what it could be?

 

Air in the system, you need to bleed it a lot, what kind of work did they do. Start it cold and keep feeling the two radiator hoses, they should not heat up at the same time.

 

Don't drive it to overheat , stop, and drive some more. It'll kill your engine before too long.

 

there is no air in the system. When i pop the rad cap off...its just pouring out and the resevoir is full.

also just found out that after the gauge goes up past halfway, i turn off the car and put it back to the ON and the temp gauge reads only 1/4...when i start up the car...itll slowly go up.

 

^you have to wait untill the car is completly cold.....start the car with the radiator cap open so pressure wont build up....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95greenlude &raquo;</TD></TR><TR><TD CLASS="quote">^you have to wait untill the car is completly cold.....start the car with the radiator cap open so pressure wont build up....</TD></TR></TABLE>

big ups.

you can use the bleeder on top of the thermo housing if you need to also.

One of these days I'm gonna make a "Bleed your coolant system the right way" writeup.

 

Is this the digital temp gauge on the 4th gen? I had the same problem, ended up missing a ground wire from the battery.

 

^ yes this is the digital temp gauge from the 4th gens.
ehhh what ground wire?

 

I only had the thermostat ground, valve cover ground & transmission ground connected. Forgot to add the ground that attaches to the frame right in front of the battery.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by saikou &raquo;</TD></TR><TR><TD CLASS="quote">I only had the thermostat ground, valve cover ground & transmission ground connected. Forgot to add the ground that attaches to the frame right in front of the battery.</TD></TR></TABLE>

That would be a big one lol. The whole chassis gets its ground from that. I'm surprised it started up and ran like that.

 

id also check the thermostat

 

ok i think it's the thermostat.
i let the it cool down and started it up and waited for it to fully warm up....then it started overheating and the upper rad hose was hot but the lower one was cold.
its a brand new honda thermostat....hmmmm?

 

that is definitely a thermo prob

Boil it in a pot of water and see if it opens, I doubt it will.

 

Sounds like a ground problem to me...

 

How can you say a ground problem when obviously the thermostat isn't opening?

 

The last OH thread, the guy put the stat in wrong and cut the o ring around the stat, had a leak and was OHing.

 

ok, it is not the thermostat.
i took it out today and ran the car and it still overheated.
anyone know what else it could be?
im gonna check the temp sensor tmr.
the rad doesn't seem to be clogged either, its hot all across.

 

I'm running into the same issue with my turbo 4th gen. I'm not sure if its due to the civic half rad, but temps are crazy high. Even with the Mugen Thermostat & fan switch, it's still staying pretty high.

Maybe I didn't bleed the system right? From what I can understand, take the rad cap off, put the heat on high on the HVAC and turn the car on. It'll bleed the air out through the rad, right? Am I missing something??

 

theres a bleeder valve on the thermostat housing.
but most people doit the way you described.

 

If you are confident there is no air in the system, then you have a blown head gasket. Also remember the job of the tstat, it is supposed to hold coolant in the radiator so it can be cooled down, then circulate, stop circulation, and cool down the coolant in the radiator, without a tstat, the coolant would just keep getting hotter and hotter, but I would only expect this out in the desert, you have to have other issues, headgasket or RESTRICTED radiator or air.

 

im sure there is no air in the system.
i doubt it is the HG because because there the oil would be milky looking right? the oil looks fine and its at the full mark.
i work at honda at the tech said just take the tstat out and if its still overheating, i got other problems. So he checked to see if the rad was clogged but he said its fine. So im gonna check the temp sensor tomorrow to see if its grounding out or something. Just gonna remove the sensor so it should stay cold and if it doesnt then that'd be the prob.
ugh...problems....

 

does you radiatior fan work?

 

check all your grounds, esp., the ground coming off the batt.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostedh22lude1 &raquo;</TD></TR><TR><TD CLASS="quote">check all your grounds, esp., the ground coming off the batt.</TD></TR></TABLE>

its grounded to the rad support. hmmmm....i wonder if the body shop painted over it and connected it back? that could probably cause a bad ground. will check it tomorrow.

 

I am with you on praying that it is not a HG, BUT dont you think that 150 PSI blowing into the coolant system can overcome 15 PSI in the coolant system and no oil has to get in the coolant and no coolant has to get into the oil, this can happen, but let hope not on your car. You can buy a kit to test your radiator for a blown HG and there is are two popular tests (actually one) by using a 5 gas analyser, and a test using a pressure tester to see if you have a leaky HG. Let hope this is not it.