View Full Version : My KA (SOHC) runs cold 24/7?

04-01-2010, 04:39 PM
I bought another 240sx hatch. when i bought it the guy says the motor was rebuilt 8000 miles ago and showed paper work. its all stock wit advanced ignition timing. I drove from north hollywood to lancaster and back (75 miles). the whole time my engine runs cold, maybe a little above the C, bear in mind it only has water in the radiator! I know its not the gauge because i turn on the heater and it really doesnt blow hot. Im thinking i probably dont have a therostat, I would go to a mechanic and check it out but I figured id ask first. any advice on what it could be?

04-01-2010, 04:42 PM
Its def your thermostat, its probably stuck open. easy fix.

04-01-2010, 05:02 PM
wouldnt that be bad for the motor

04-01-2010, 06:50 PM
thats your thermostat , my hard body pickup does the same thing

04-01-2010, 06:52 PM
not bad, but running too cold isnt always good, you always want your motor running at the right temp...just replace with a nismo thermo, they're only like $40 and easy to install

04-03-2010, 02:09 AM
will do, tnx guys

Slammed Assassin
04-03-2010, 02:22 AM
agreed, its bad if you daily your car and dont reach proper running temps.

after you change it make sure you bleed out all the air.

01-16-2012, 08:06 PM
sorry to bump a old thread but i'm having the same problem.
I'm running a Koyo Rad with just a 12inch Efan in a remote switch.

I replaced the Tstat with a BRAND NEW one today and it still runs cold.

Any ideas?

01-17-2012, 01:22 PM
@rwtf, where did you get your new thermostat? Could be bad if you got it from autozone, that or you just need to bleed the system a bit more

Pro ViZIon
01-17-2012, 03:30 PM
Well if he had air in the system he would probably overheating.