170degree VS. 180Degree Thermostat

[xerexabante]

Hey guys I changesd out my thermostat. Well I made a mistake oredering a 170degree rather than a 180degree thermostat. It was cheaper too for the 170*

Well my car is running a little bit fasssster than it was. More response better shfting, no MIL, cooler engine.

[oldmako]

Are you running an auxiliary trans cooler?

[xerexabante]

No.

[Haitian_King]

Hey guys I changesd out my thermostat. Well I made a mistake oredering a 170degree rather than a 180degree thermostat. It was cheaper too for the 170*

Well my car is running a little bit fasssster than it was. More response better shfting, no MIL, cooler engine.

Sorry for my ignorance (it still tends to rear its ugly head) but what is MIL?

[oldmako]

Thx for the reply. I am just curious because you mention quicker shifts. I have yet to install my cooler and I'm guardedly optimistic that it will extend the life of the trans. The relationship between the coolant temp and the trans is interesting. The first time I drove it really cold I thought my box was toast!

Do you see a corresponding drop in the temp gauge on the dash? If so, approx how much?

[xerexabante]

Yes the gauge is a little bit lower than before. I am in the impression that the computer is trying to compensate for the 10 degrees cooler and is probably having the engine run a little bit rich. Thus for the quicker shifting and more power. My main concern was MIL, but that should not be a problem. I don't have the MIL on since the install. One more thing is my A/C is Cooler as well. All in all I will keep this setup, What and upgrade from before.

[xerexabante]

Check Engine Light, is the same as MIL Malfinction Indicator Light

[Haitian_King]

Check Engine Light, is the same as MIL Malfinction Indicator Light

Thanks.

[xerexabante]

Hatian I am so impressed with you and your research. I don't think you miss a beep. I think you are an aset to this site. I try to help but so overwhelmmed talking to the banks with these forclosures and short-sales.

[Haitian_King]

Hatian I am so impressed with you and your research. I don't think you miss a beep. I think you are an aset to this site. I try to help but so overwhelmmed talking to the banks with these forclosures and short-sales.

Thank you. I try. I'm happy to see that it's appreciated. Every now and then, I come up with the occasional gaff, but those days are becoming few and far between.

The real-estate market sounds interesting. I'm considering leaving the field of wireless phone sales and getting my Real-Estate License. I figure if I sell at least one house a month, I'll be able to still live a little comfortably.

[xerexabante]

People think it is easy, but it is not. Try dealing with banks on their properties.

[SUB ZERO CAR FANATIC]

Cooler always means more power in one way or another.Nice isnt it!! By the way where did you get the 170 power stat?oem or what! thanks, SUBZERO.

[SUB ZERO CAR FANATIC]

Haitian, isnt it nice to feel appreciated once in a while,and know there are several people out there wholike you and your help.Even if you dont know it all doesnt mean you cant contributeto something or be a part of a group discussion.I like you and think your alright!!! Regardless of what acertain couple people say. I dont think i have to mentionany names you know who im talking about my friend!!! Have a great day.ps, let me know what you had 4 me, you got me curious now!!

[Haitian_King]

I sent you the email and replied in the other thread. Hopefully you'll be pleasantly surprised.

[SUB ZERO CAR FANATIC]

I sent you the email and replied in the other thread. Hopefully you'll be pleasantly surprised.

Thank you very much my friend!!! I got your email, thanks.i might just get that one!!

[Haitian_King]

No problem.

[xerexabante]

I order from the warehouse, not your reatailer. I have a shop and I was inclined the I was getting OE thermostat. When the part came in it was Gates thermostat, I did not mind the Non OE Brand. I did not realize that when I checked the P.O. It was a 170 degree. Well what to do I had to go home and the car was already prepped for install.

[Q45tech]

Make sure the Gates has an oem designed jiggle valve and is a perfect clone of oem.

We refuse to use non oem parts after many educations but up to you to learn in a painful agonizing potential mechanical death.

[oldmako]

This whole thread was just like a day in high school with a substitute teacher....entertaining, interesting and pushing the limits.

Then, the principle stuck his head in the door. ...Buzzkill.

So, are we d!ck' our engines up by running them 10 degrees cooler??? In what way? Is the jiggle valve that important? Inquiring minds want to know!

C'mon...........

[StarPD]

Modern cars are designed to run hotter than they used to.Overcooling is not good for your engine. It results in bigger than ideal clearances.

Q45Tech will likely chime in here. If he says 170 degree 'stat is okay, then I'm wrong, but I doubt it.

[Skibane]

I am in the impression that the computer is trying to compensate for the 10 degrees cooler and is probably having the engine run a little bit rich.

Yep, the computer "thinks" that your engine isn't fully warmed up, and keeps on dumping in extra fuel. Running rich reduces fuel economy, hurts exhaust emissions, breaks down the oil quicker, and probably makes your cats run quite a bit hotter, too.

[maxnix]

Yep, the computer "thinks" that your engine isn't fully warmed up, and keeps on dumping in extra fuel. Running rich reduces fuel economy, hurts exhaust emissions, breaks down the oil quicker, and probably makes your cats run quite a bit hotter, too.

Skibane nailed it. There is a reason there is an OEM Specification!

[xerexabante]

It is OEM Thermostat. I choose to keep this one on until I see differences on my mileage, MIL, or something. I don't think that this thermostat will kill my car though, maybe if I ran it with out oil or water.

I own a shop, and have been wrenching since i was 15. As for now I am enjoying my car, than before.

If I see changes to my car and if I feel that this is not worth to have on your cars I will let you guys know.
Modified by xerexabante at 11:37 PM 4/10/2008

[jimbyjimb]

Yes, please keep us posted. I'm particularly interested. Could be a very cheap way of gaining some power. Never occured to me the extreme difference it could make on a computer-controlled machine as opposed to a non-computered machine. Very interested indeed.

[Q45tech]

In Summer unlikely that a colder opening thermostat [thermostats are spec at temp where maximum flow occurs] will materially effect the warm up or hot running coolant temperature because the used radiator is no longer effecient as new.

Thermostats are designed to warm coolant up fast, then get out of the way.

Read and graph coolant temperature vs time.

The usual problem we see is a thermostat failure going unnoticed in summer delaying warm up in winter and lowering peak temp from heater.

Don't confuse the high thermal mass of an all iron engine with that of an all aluminum engine as the need or usefulness of a colder opening thermostat.

Running heads too cold will need to consider a hotter spark plug if the engine must idle or start cold frequently.

The difference between the full open temp [say 194F] and the running coolant temp [ideally 174F] is the system reserve. Most Q run about 178-182F.

[maxnix]

Running heads too cold will need to consider a hotter spark plug if the engine must idle or start cold frequently.

Don't see how even not having coolant would affect cold start per se. Maybe soon after cold idling, yes.

[Qproject]

wow this is awesome, first the ecu tcb upgrade, and now this.

I think I'll keep my future f50 stock and turn it into a rocket !!!

[Q45tech]

No coolant would result in an error in sensor reading so ecu would use 68F to start and immediately switch to 176F to run. Probably not what the engine was except in Summer.

Remember coolant temp sensor needs liquid surrounding it to read.

[maxnix]

Sure, but not to start. That was my point. Not that it is also my recommendation.

Qproject has at least achieved Q45 nirvana.

[xerexabante]

No coolant or fluid will result no reading from the coolant temp sensor.