160 or 180 degree thermostat?!?!? - Mustang Evolution

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Old 05-06-2012, 08:02 PM   #1
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160 or 180 degree thermostat?!?!?

I was

---------- Post added at 07:02 PM ---------- Previous post was at 06:59 PM ----------

I was wondering which one I.should.go with. I have a stock thermostat now, and on these really hot days it wants to push the 200 mark on the temp gauge. Just wanting it to run a lil cooler. Should I go with a bigger radiator also? That's also stock. All this is on a 91 5.0 5 speed, with a 1" intake spacer, bbk shorty headers offroad xpipe into two flowmasters before the rear wheels.....
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Old 05-06-2012, 08:08 PM   #2
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200 is ok. I had a 180 t-stat and would never go any higher than 180. So I just changed to the stock 192 and stays around 195
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Old 05-06-2012, 11:43 PM   #3
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use the stock one.
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Old 05-07-2012, 12:13 AM   #4
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Absolutely run the stock one I had a 160 in mine and I pretty much ran closed loop all the time cause the engine never really got up to temperature. I swapped in the stock one which is in fact 192 it'll be where it is supposed to be.
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Old 05-07-2012, 04:23 AM   #5
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Re: 160 or 180 degree thermostat?!?!?

Quote:
Originally Posted by Chris01 View Post
200 is ok. I had a 180 t-stat and would never go any higher than 180. So I just changed to the stock 192 and stays around 195
Quote:
Originally Posted by dreamstang View Post
use the stock one.
Quote:
Originally Posted by Nicolosi11480 View Post
Absolutely run the stock one I had a 160 in mine and I pretty much ran closed loop all the time cause the engine never really got up to temperature. I swapped in the stock one which is in fact 192 it'll be where it is supposed to be.
Absolutely stick with the stock temperature thermostat, unless you want premature engine wear and exhaust that burns your nose and eyes.


If you need it you can get aftermarket high flow thermostats in the correct temperature range.
You may need to flush and clean out your cooling system too.
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Old 05-07-2012, 03:30 PM   #6
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I have the coolest one you can get and my car does fine with it but I also put a aftermarket fan controller on my 94 no exhaust smells lol
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Old 05-07-2012, 03:42 PM   #7
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Originally Posted by kid_kash_00
I have the coolest one you can get and my car does fine with it but I also put a aftermarket fan controller on my 94 no exhaust smells lol
You may be over working your fans. With the fluid alsmost constantly flowing it will not have as much time to cool.
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Old 05-07-2012, 05:43 PM   #8
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Re: 160 or 180 degree thermostat?!?!?

I have a 95' with the stock radiator and fan.
When I bought it I had about a 450 mile ride
home. The car ran at 210* for awhile then it
moved up to around 230* wich I didn't like.
I did purchase a new radiator wich I haven't
put in yet, But I did swap it out to a 160*
Tstat and now it runs right at 195* and when
I run the A/C it will go up to 210* +.

When I install the new Radiator a 195* stat will
replace the 160* bandaide that is in there now.

I would Flush and clean the cooling system. This includes
Hoseing out the radiator fins and A/C condensor to get out
any road grime and bugs. Straighten any bent fins with something
soft that won't puncture the radiator. I use the end of Ziptie.
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Old 05-07-2012, 07:47 PM   #9
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Re: 160 or 180 degree thermostat?!?!?

There is a reason for the factory thermo. If you don't get the motor warm enough it will not boil out and water that might have condensed in the oil (Thus the increased engine wear previously mentioned).

Go with stock and add a better fan if you think the small temp difference if going to matter on your ride. Better off adding a function cowl, or other heat venting capability
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Old 05-08-2012, 03:15 AM   #10
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Re: 160 or 180 degree thermostat?!?!?

Quote:
Originally Posted by kid_kash_00 View Post
I have the coolest one you can get and my car does fine with it but I also put a aftermarket fan controller on my 94 no exhaust smells lol
You may think your engine is doing fine, but if the oil temperature is not getting up to a minimum of 180° you are causing premature wear to the engine internals.

Quote:
Originally Posted by Mike90 View Post
I have a 95' with the stock radiator and fan.
When I bought it I had about a 450 mile ride
home. The car ran at 210* for awhile then it
moved up to around 230* wich I didn't like.
I did purchase a new radiator wich I haven't
put in yet, But I did swap it out to a 160*
Tstat and now it runs right at 195* and when
I run the A/C it will go up to 210* +.

When I install the new Radiator a 195* stat will
replace the 160* bandaide that is in there now.

I would Flush and clean the cooling system. This includes
Hoseing out the radiator fins and A/C condensor to get out
any road grime and bugs. Straighten any bent fins with something
soft that won't puncture the radiator. I use the end of Ziptie.

In your case, you are correct. The 160° thermostat supplied a "bandaide fix" to a compromised cooling system. The new radiator will definitely help and just so you know, they make inexpensive plastic "Fin Combs" to straighten out bent cooling fins on all types of radiators, condensers and heat exchangers.
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