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View Full Version : RB25 160° thermostat / overheating issue


Krazykouki
03-17-2011, 01:51 AM
Does anyone have a part number for a drop in 160° thermostat?

I have the 170° thermostat now but after a little bit of spirited driving it tends to creep. It doesn't overheat severely but it is enough to find any flaw in the cooling system. I've busted countless hoses and have been stranded many times and it makes me more nervous than anything. I also vacuum bled the coolant system to ensure an airless cooling system. I just performed a leak down test, coolant system pressure test and tested the coolant sensor to ensure that is was not a minor mechanical failure causing the creep.

Right now I have a 2.75" thick dual core radiator and 1 14" pusher fan with 1 bottle water wetter and a 75% water and 25% anti-freeze mixture. I ordered some Flex-a-lites but I am also going to be adding A/C to the mixture here soon as well. I also do not want to run the Nismo thermostat as it is too cold along with the fact that the lowest my fan controller goes is 160°.

I found 1 160° thermostat but it is .1" larger than stock and I'd rather not have to chuck it up in a lathe to make it fit

NismoS13Ks
03-18-2011, 07:57 AM
thats odd, shouldnt be overheating. are you running a aftermarket temp gauge?

Sileighty_85
03-18-2011, 08:08 AM
I have a Koyo, Nismo Thermo, N1 Water Pump Dual FAL fans, with a DIF controller Version C.

Works great my fans would kick on at 80*C and shut off at 72*C

Just ordered a DIF PWM controller for better control.