thermostat

[iwannadie]

is the thermostat the same for turbo and na?

i wanted to order one(no shops near me have them). on horsepowerfreaks.com they only list the turbo model Tstat. also they dont mention the temp rating....

 

[Yellow 13]

I believe they are.

 

[supramacist]

They are the same wich I believe also attributes to the over heating problem..

I discussed this the other day and some of us settled that a 180 degree t-stat is where it's at not to hot not to cold.

 

[iwannadie]

They are the same wich I believe also attributes to the over heating problem..

I discussed this the other day and some of us settled that a 180 degree t-stat is where it's at not to hot not to cold.

180 is what my autoparts store have, they cant even order me the stock 160* F. i figured 180 would be too hot, i mean 20 degrees over stock seems much to me. i also live in the desert where it gets Dam hot in the summer....

if 180 seems to what everyone has tried and works i might give it a go though.

 

[GotToyota?]

I would go with the 160* if you can find it, every little bit helps when you live in the desert area.

-Matt

 

[johnathan1]

IIRC, stock is 190 C

 

[supramacist]

I like the 160 as well. Where's the tiffany pic man???

 

[mrnickleye]

The stock temp is 195*F. I live in the mojave desert. 106*F is summer. Freezing is winter.

I run 180* stat in summer, and 195* in winter (for decent heater).

More important than thermostat temp is a very good cooling system, and radiator. AND...a fan that pulls a lot of air for city driving.

If you have an automatic, you can take some heat off the radiator by adding a trans cooler in series.

You could add an engine oil cooler too.

Remove the rubber seal at the firewall that meets the hood. This does allow a bunch of heat to flow out of the engine compartment.

 

[supramacist]

good point with the rubber seal. I'll concider doing that.

 

[jdub]

The ECU looks at coolant temperature to switch over from cold idle to hot...that occurs at about 176 deg F. In addition, the ECU looks at coolant temp for a bunch of other things...injector duration, timing advance, etc. If you change the thermostat to a colder one, it can make the motor run rich across the rpm range if the O2 sensor can not get the ECU to compensate.

A colder thermostat will not make your engine run cooler...it just opens earlier. At minimum you will delay the ECU from switching from cold idle to hot. Thermal capacity of the radiator and airflow across it is what will make a difference.

I live in Phoenix myself and run a 180 deg thermostat...that is just to get the cooling system "ahead of the game" during the summer out here. Unless you live in a place that's hot (like Phoenix and it never really gets cold), I would use the stock 195 deg thermostat. I would never use a 160 deg one.

 

[iwannadie]

well ok, i pulled the termostat out and thought it was the correct one being 160degrees. i guess the previous owner put the wrong one in, could explain alot of my problems right there.

im going to order a stock toyota one and replace it as soon as i can find someone to buy from.

 

[supramacist]

Gilbert doesn't have a toyota dealer???

So then wer'e all agreed on the 180? Everyone keeps changing there mind around here.

 

[jdub]

Gilbert doesn't have a toyota dealer???

So then wer'e all agreed on the 180? Everyone keeps changing there mind around here.

Considering your climate in KY...a 195 deg thermostat would likely be a better choice. If you want to increase the thermal capacity of your cooling system, get a big radiator like the CSF.

 

[supramacist]

I hate to spend money on another radiator when the stockeer is fine.
I'm going to get the car back on the road and then figure out what it is that it needs. But the t-stat keeps coming up. If I get to where I can't decide I
ll go stock and this thermostat is probably going to be a stock part. Because the simple truth is I don't know. I'm not a mechanic, yet again. I just work on my own ride.

 

[jdub]

The stock thermostat will be fine for you man...your motor will get up to operating temp faster and the ECU will shift over it's warm ops algorithms. There is really no need to run a cooler one...but, if it makes you feel better get a 180 deg...the difference is negligible. I would not go any lower though.

 

[supramacist]

I had said the only reason I strayed from stock was because I have some friends that roll z cars. They have switched to the 160 and it made sense to hear it initially. But the supra is not a z by any means. Toyota isn't Nissan.

I'm not dis'n any one because I like them both. But this is the last toyota I will ever purchase. By the time it's all said and done I'm going to have right around 12 grand in restorations.

I appreciate the comentary Jdub, alot dude. Thanks.