What is the disadvantge of not using any thermostat here on the Pacific Islands...

I would not think , it would be good for any car street driven to be without a thermastat . You will run to cold ! You will get some reasons why from members that have more knowledge in this areau than I do .

I don't believe it's a good idea, you're not going to help your cooling any.

It will take longer for the car to get warmed up and it will probably run too cold.

You will most likely never go into closed loop, unless you spend a lot of time sitting in traffic at idle. The end result of open loop operation is higher than normal idle, excessive fuel consumption because of a rich mixture and possible damage to emission components such as the O2 sensor. Your best bet in that environment is to run a lower temp stat if you want. I am curious, any reason why you don't want a stat? The engine does need to develop heat in order run correctly because of the electronic control. Over there, I think I would be on my sportbike more often than in a car. So Long, Danno

my turn

you can overheat the car by running without the thermostat



I'm not joking either

I've just got to ask, since you're not joking, how can you overheat the car by running without the thermostat? It would seem logical to me that if you ever overheat without a thermostat that you certainly would have had you had a thermostat. Just wondering...

The thermostat actually slows the speed of the coolant down so that the radiator has time to cool the water off. If the thermostat was not present then the water would not spend enough time in the radiator to cool off. If a part could be left out safely then the engineers probably would not have put it there in the first place.

The thermostat also provides a fast warm up ensuring less engine wear, sludge build up, and acid formation. Cold cylinders equal cold thick oil equals more friction. The warmer the cylinders the less friction and more efficiency therefore resulting in more power. Its as simple as that.

Bzzt, wrong. It flows faster through the engine, so therefore it has less time to warm up, so that balances out the less cooling in the radiator.

I had a bookmark to a thread here with the exact same arguments, but it got lost when the message board stuff changed. If you search hard enough you will probably find it.

You're right about that.

I'm sorry, but I gotta:


This is an old wives tale. Try it sometime, see what happens. I already know what happens. Overheating isnt an issue.

We've talked about this before. You won't overheat if you run with no thermostat, you'll run cold. And you will go into closed loop eventually because the computer automatically goes into closed loop after a certain amount of time.

I like your first post Madmax, sounded like you knew what your talking about . As for the therm slowing coolant speed, put some money where your mouth is and then we'll talk!! You can get in touch with me through email at mccleanb1@winthrop.edu. I'll have the machine shop next to where I work run a test with and with out the therm. They'll be able to tell me everything.

BTW-I have tried it (why the hell would I have brought it up). 90 degree day in July. I take the therm out and run the car around for some errands. I never hit heavy traffic and the temp never went below 220. This is with an electric fan hooked to toggle switch. Later that day I put a 160 degree thermostat in and my temp at 1:00 in the afternoon was around 200. 20 DEGREES!!! Don't tell me its an old wives tale.

BZZZZZZZZZT. Your wrong. What are you smoking? Less restriction on the waterpump and less restriction to flow because the lack of thermostat would lead to INCREASE in flow. That means the water is not absorbing enough heat resulting in higher temperatures. Yes it is true that it would take longer for the COOLANT to get hotter but the ENGINE would not be dissipating the heat resulting in hotter engine temperatures.

Here's a thought. How about proving me wrong!! Take your thermostat out and instead of relying on that piece of s**t temp gauge go and buy a digital hand held thermometer. You know the kind that you get off the snap on man (did I mention my fathers a snap on man ) . Point it at the intake, block, or whatever. Then tell me what ya get.

Already did all that. 4 different cars. Took one on a long trip over the steepest grade in the state and it, unlike usually with the thermostat, ran cooler. One the thermostat stuck in while on a trip and I just removed it since there were no parts stores around... and it ran just as cool as always. It doesnt have overdrive either, so you would think with that big restriction missing and traveling down a freeway with the engine buzzing at 3300RPM it would be a huge problem.

You know, not all of us dont have access to things like infared thermometers and other supposedly special equipment. In fact, I didnt even have to borrow it from my daddy.

LOL on that one. Just so you know I pay for my tools (only because I get them at cost). I just happen to be fortunate. I also help my coworkers out so I'm sure they don't mind my "daddy" being a Snap On man.

I ran no stat in my 4banger Mustang and had no overheating problems, not to say it doesn't happen.

NOTICE!! I did not say overheat at all. I said the engine will run warmer. Overheat was the exact wording of RX7speed.

Mark, What year vette?? My stepmother has a 2002 vert (silver with black top). She got it 10% below cost and pays no interest because she used to work for GMAC. It has the same rims the red one in your sig does.

It's my GFs Dads vette an '02 as well. I never realized how big the vettes are now until I put my car beside it.

LOL. Yeah but they sure don't feel big when your drivin em.

Seriously, I've never had one run hotter that way, if anything colder. The water doesnt have much choice but to get hot anyway, its trapped in the block even if its going fast, and its going to heat up. Its all about transfer, you pull 10 degrees out of the block and throw 10 degrees out the radiator, so maybe each water molecule is carrying less heat out, but theres more of them going by carrying less so in the end it should really make no difference.

https://www.thirdgen.org/techbb2/sho...ove+thermostat

Aha, found the post.

I'll just quote Glenn's post:

Haha, AlexJH, I was just thinking of that old post. And for anyone curious, yep, I've kept my grudge.

Thanks guys.... I get my thermostat this comming weekend. thanks..

ok here is one for you then


the problem I see with running without a therm is maybe not overheating as I said (kinda in a hurry so just put that) but you will be more prone to develop hot spots on the motor

the thermostat will help slow down the coolant and in doing so will create more pressure inside the motor block to help prevent the water from either boiling, or getting hot enough to seperate the water from the coolant and creating a vapor blanket.

now either one of these might not show anything on your collant temp but you motor itself (not the water but the motor) would get these hot spots in them

problem is these can cause detonation to happen


the slower moving water can remove more heat from the motor also but only within reason
if the water moves to slow it can also cause the water to form those vapor blankets or to get too hot.


you have to find the right balance

During warm weather months I run without a termostat on my non computerized Camaro and see about a 10 degree drop in temp sitting in traffic. A high flow alulminum water pump(just installed) should help even further in the 100 degree summers we are sure to have here in Texas.

Mark,

It looks like she's a keeper then


Rob

also without the thermostat yo uare going to lose that presure that will help your water pump from cavitating, something that is very bad




why is it you are wanting to run without a therm anyway?

ok I may be dumb, but I thought a thermostat kicked on to run the fan when the engine is getting warm, so wouldnt you overheat without one?

You are dumb!! Just kidding. Actually the thermostat does not control when the fan turns on.

the thermostat is something in the car that will close to only let water flow through the block itself that way the water will bypass the rad and warm up a lot quicker.
then when the car hits the right temp it will open up and let the water go into the rad that way the water will not get too warm