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Old 01-19-2011, 11:47 PM   #1
subie814
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Default Overheating in stop/go traffic

Hi everyone,


I recently experience the temperature gauge increase in stop/go traffic but my oil temp gauge was still reading normal. I am thinking thermo stat but looking for other ppls opinion on this situation. I replaced the radiator a year ago to the mishimoto aluminum radiator and silicone hoses but didnt replace the thermo stat. Also once i start driving consistently the temperature drops again. Is there any other possible reasons that could cause this?
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Old 01-20-2011, 01:12 AM   #2
Dzordanpl
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Default

Quote:
Originally Posted by subie814 View Post
Hi everyone,


I recently experience the temperature gauge increase in stop/go traffic but my oil temp gauge was still reading normal. I am thinking thermo stat but looking for other ppls opinion on this situation. I replaced the radiator a year ago to the mishimoto aluminum radiator and silicone hoses but didnt replace the thermo stat. Also once i start driving consistently the temperature drops again. Is there any other possible reasons that could cause this?

Try checking your radiator fans and fan relays for the begining. Usually they cause your car to overheat in traffic.

Thermostat will cause your car to overheat constatnly, it might be good idea to check that second.

GL
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Old 01-20-2011, 01:17 AM   #3
Seventh
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Pressure test to be 100% sure there's no leak. Test fan/relay operation. (power probe FTW) I ALWAYS recommend t-stat with an overheating complaint, it's cheap, easy to do and great insurance. Fans are my guess tho.
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Old 01-20-2011, 08:46 PM   #4
Torquey
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Pretty sure it's air in the cooling system, that you'll need to burp out. Here's a similar thread:

http://forums.nasioc.com/forums/show....php?t=2061807
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Old 04-28-2011, 03:55 PM   #5
white guys wrx
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remove your radiator caps turn the car on till completely hot tighten the caps do a few times... if problem is not solved swap out your thermostat with a SUBARU THERMO nothing else they are $4
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Old 04-29-2011, 07:15 PM   #6
Krazox
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I ran into this problem once before and was exactly like yours. Check your radiator fan fuses. Both of mine blew and all I had to do was replace them. Definitely worth checking something as small as fuses before you go onto larger things!
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Old 05-08-2011, 03:49 PM   #7
sackytar
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Or sometimes the pigtails gets disconnected. Very easy to do.
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Old 12-19-2016, 03:00 AM   #8
khang768
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Default Subara Impreza 2005 model high temp when in traffic

My too.When I got stuck in traffic jam, say 30 minute no moving, I see the temp gauge raise to about 3/4. when out of jam, it went to normal. Any advise will be appreciated.
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Old 12-19-2016, 03:46 PM   #9
mrsaturn7085
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Check that your fans are working as they should.

Sitting still, the only thing you are missing is airflow across the radiator. The fans should be taking care of this - since your ECT is rising (you are NOT technically overheating yet), I suspect your fans are either not working at all, or not working in high-speed mode.

Since the temp. goes back down when you get moving, the issue should NOT be the headgasket, air in the system, or other similar issues - this is clearly an airflow issue.
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Old 12-24-2020, 01:56 AM   #10
athornton
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Default Similar Problem but temp comes down when I increase RPM

I have a similar problem with my 02 wrx. When I come to a stop sometimes the temp starts to creep up to the 2/3rds line and doesn't go above that but if I rev my engine the temp drops back down. If I keep sitting their the temp will go back up again and once I start moving the car goes back to operating temp. I have replaced the thermostat, the radiator, and burped the system. Sometimes I hear a gurgling noise in the dash area and so I think air is getting in but I don't know how it is.

Any help would be greatly appreciated.
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Old 12-24-2020, 07:08 AM   #11
snow_bound26
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Have you replaced all your coolant hoses as well? At that age they need it.

How did you bleed the system? Did you accidentally switch the upper res cap with the radiator cap? Do you remove the heater cores hoses and accidentally hook them up backward? My first thought is thermostat and there is a chance your new one is faulty. But the above mentioned can cause what you describe as well especially if the system wasn't bled properly.
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Old 01-04-2021, 03:12 PM   #12
WRXRgr
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Overheating in low-airflow conditions can indicate a worn impeller in water pump, also.
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