Thread: engine temp

This is my set-up:

2000+ SR20DE motor with Blox WAI and 2.5 SSAC, 2.5 catback with Remus muffler. Raised fuel pressure via Nismo AFP. Car has CVT tranny with its own oem tranny oil cooler. I run Prestone 50/50 premixed coolant.

Koyo R1977 alu-rad, with Koyo 1.3 bar radcap. Flexalite puller slimfans in shroud. Pusher slim fan Flexalite in front a/c condenser. HKS fan controller. All fans kick in at 96 C and swith off at 92 C. Ignition timing is set at 17". Car passes smog test w/o any problems.

I live at approx. 1000 m altitude and ambient temps are between 20 and 30 C all year long. Oil is RedLine 15W50 synthetic.

I notice that in slow traffic and drving on highway in overdrive, engine temp quickly goes up to 96 C. Whyn I switch off overdirve and engine revs more, temps go down immediately tot approx 92 C. Downhill even more, to 88 C.

When climbing, temps go up again and the same happens in slow traffic: temps go up to 100 C. Fans do kick in, I checked.

The alternator is not so good anymore, voltage drops to approx 12 to 13 Volts when engine is at running temp. At idle it will drop to 11.5-12 Volt. I will change the alt asap.

Heat sources are the header and the CVT. But with this set-up I should not get temps to go up this fast, should I ?

I will check/change the thermostat soon, could this be the culprit ? Or air in the cooling system ? Should I also install a Nismo-thermostat ? Ambient temps are always high here. Could the waterpump be bad ?

Any suggestions ?

Our thermostats open at 170*F and the nismo I think is 160*F iirc. Fans kick on at 205-210*F.

Are temps getting over 100*C? Only then would I consider it an issue. But 105*C is where you don't want to see it get any higher. Any higher than 110*C and things start going really bad for the engine.

It went up to 102C a couple of times, not much though. But with this rad set-up it should not. I wonder whether the Nismo thermostat would make a difference in the end, it only opens earlier right ? Any suggestions ?

Are your fans turning on? Is your waterpump in good shape?

If you don't see temps below 20 degrees celsius, just remove the thermostat. You make more power with an engine running cooler.

If emissions is your concern, you can try changing to another OEM thermostat or a Nismo unit. The Nismo thermostat opens earlier than OEM. I think the EURO thermostats open up even higher than the US ones do.

I know for fact that my 1995 B14 200SX SE-R, the fans turn on when the coolant registers 212* F (100*C). I sat and watched it happened over and over and over.

anything under 210 on a turbo car for me would be normal. I run around 200 in summer sometime it hits 210 but like i said normal. fans kick on around that temp

emissions in Costa Rica?

my temp is normally around 180.