1slowS13

so its winter time and my temp gauge was always fluctuating, either too cold, or normal operating temp.

so i thought my thermo was stuck open

i buy one from autozone, open it up, and i dont have one. so i put it in, right side in, with the jiggle valve on top.

run my car, overheats, no biggie, i jack the front up and bleed it for a while.

after a while or so, still over heating, so i take the thermostat and put it in a pot and heat it up.. it opens.. i put it back in

still overheating.. lower hose it cold, but the thermostat housing is hot.

i take the hose off, and there was barely any fluid coming out.. i take the radiator cap and it just pours out of the hose.. is that normal?

my car ran fine with the thermostat off, just cold and no heater..

wht240sx

Is the coolant boiling over to the over flow tank??? actually bubbling??

10-66kruk

ive been having this same issues and am running a mishimoto aluminum radiator nismo thermo and am "over heating" wish i could figure it out as well.

1slowS13

yea it boils and flows into the overflow

im running no thermostat again just to get around

wht240sx

you might want to check your water pump. take it off and inspect it. Also you may need to pressure test you cooling system and see if you have leaks. Thats where i would start.

bo2o

what color is your coolent when you take flushed?

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CrimsonRockett

Change out the Mishimoto radiator cap.

My friend's S13 did the exact same thing.

Turned out the cap wasn't holding pressure.

Replaced it with an OEM Nissan one...done.

No more overheating.

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1slowS13

the color was green, it was pretty clean.. like the p.o. said, he got it flushed.

also, when running no thermo, you can clearly see the water circulating..

mikethebiker

i would think the problems in your waterpump
inspect

1slowS13

so i went ahead and got another thermo from a different auto parts store, and instead of getting 50/50 for $8, i got some distilled water instead.

i put it in, drive it around, doesn't over heat.

im like cool, i pull into the garage and let it cool.

after a hour or so, i top it off and run it without the rad cap and with the bleeder loose.. take it for a drive, overheats again! wtf? im like fuck it, i pop the rad cap out and it was steaming, then i start the car, then a few seconds later it starts spewing water and coolant, so i throw the rad cap back on. drove it home to get some more water, but never overheated after.. i went around town, drove on the highway, and even went through a busy drive-thru and its fine. odd.

10-66kruk

really? ya there seem to be a lot of steam coming from that area. Hope that's it, wouldn't have thought it would be something simple like that.WIll give it a shot thanks.

holemilk00

how long are you leaving the bleeder open? Are you SURE you're getting all the air out?

Norty

ka is notorious for being hard to bleed. When bleeding jack the front up to help make sure that is the highest point and bleed that mother f*er till it the gauge is reading close to hot i used to have trouble with mine all the time. So ur not the only one.

92champgold

water pump +1

10-66kruk

Ya i will also have to try this again. How long are you guys keeping the bleeder open with coolant coming out? Also are you pouring coolant in the radiator at same time?