[Supras] Thermostat question

millenia2000 at hotmail.com millenia2000 at hotmail.com
Tue Aug 7 06:30:40 CDT 2007 

their post stated that the thermostat closed while driving and ONLY opened 
when you stopped. I said it opened when engine reached operating 
temperature. I never said it DIDN'T close when the coolant cooled off too 
much. hot summer, it will pretty much open and stay open until the car is 
parked for a while.

yes you are right that it is there to keep the engine in a set temperature 
range.

-Sean


----- Original Message -----
From: <cthommes at adelphia.net>
To: <millenia2000 at hotmail.com>
Cc: <supras at supras.com>
Sent: Monday, August 06, 2007 7:21 PM
Subject: Re: [Supras] Thermostat question

> WHAT!?  Before shouting at someone else, get your facts straight.  You 
> *need* to use a thermostat for your car to function properly.  Argue this 
> point with me if you want, I won't listen.
>
> Your thermostat *will* cycle at all times while the engine's running. 
> Probably never or rarely fully closed, but probably rarely fully open 
> either.  The thermostat is not a light switch that is simply there to let 
> your car warm up faster, it has a range of opening.
>
> There are plenty of situations where the cooling effects of a properly 
> functional cooling system overcome the heating effects of internal 
> combustion.  Coasting down a long grade for example.  Driving at 
> light-load highway speeds in sub-freezing temperatures for another.  You 
> seen the show Ice Road Truckers?  You know, the one where they cover all 
> but a very small opening of their radiator grill with a tarp to keep 
> coolant temps high enough to run right?
>
> The thermostat is the only device in your car that regulates the coolant 
> temperature.  And yes, part of its function is to slow flow so that 
> coolant will remain in the radiator for some period fo time.  Take it out 
> if you want your coolant tempurature to be a guessing game, I sure don't.
>
> With a real temp gauge you can see all this happen (most dramatically for 
> the first 5 or so cycles after a cold start).  For those of you who think 
> you know better based on the stock gauge, you should first know that the 
> stock needle sits in EXACTLY the same spot between 150F and 240F.
>
> So let's review.  If you want your engine to damage itself from heat 
> problems, the easiest way to do this is to keep the stock gauge, remove 
> the thermostat, and replace the mechanical fan for an electric (all in the 
> name of 3 or 4 mystical magical "free" horses).
>
> -Craig
>
> ---- millenia2000 at hotmail.com wrote:
>> WRONG WRONG WRONG.
>>
>> the thermostat keeps the coolant locked in the engine until it reaches
>> normal operating temperature, then it opens to allow it to cycle the 
>> coolant
>> thru the radiator to keep it at operating temperature and avoid 
>> overheating
>> the engine. it does not open and close as you drive unless you blast your
>> engine with liquid nitrogen while you drive.
>>
>> your engine is looking for a set temperature where the pistons and other
>> metal parts are expanded to their proper size. engine running colder than
>> this have extra clearances and introduce posibility of banging around the
>> wrong way. thermostat locking closed from a cold start helps drive the 
>> temp
>> up faster ( hence why its fully warmed up after 5 minutes instead of 
>> 10-15).
>> You CAN run without a thermostat, just remember that it will take longer 
>> to
>> warm your car up.
>>
>> think of it this way, you start your car in the winter with the heater at
>> full blast. it will take longer to get heat than to let the car warm up 
>> and
>> THEN turn the heat on.
>>
>> -Sean
>>
>> ----- Original Message -----
>> From: "Harley" <CoolGuyHDB at sbcglobal.net>
>> To: <supras at supras.com>
>> Sent: Monday, August 06, 2007 6:11 PM
>> Subject: Re: [Supras] Thermostat question
>>
>> > LOL. I just read the original e-mail sent out. You don't want to run 
>> > with
>> > out the thermostat. More water is normally good right? Yes... But the
>> > thermostat keeps the coolant in the radiator so it can be cooled while
>> > your driving, then when you stop it opens back up and allows the cooler
>> > coolent into the engine to keep the engine from over heating when your 
>> > not
>> > moving. Pull the thermostat out and your not allowing the radiator to 
>> > do
>> > its job properly.
>> >
>> > - Harley(87t)
>> >  ----- Original Message ----- 
>> >  From: Jeff Mohler
>> >  To: Harley
>> >  Cc: supras at supras.com
>> >  Sent: Monday, August 06, 2007 3:02 PM
>> >  Subject: Re: [Supras] Thermostat question
>> >
>> >
>> >  IMHO, it was the blood sacrifice that the aftermarket manufacturers 
>> > skip
>> > in the design process.
>> >
>> >  A little goat's blood can go a long way.
>> >
>> >
>> >
>> >
>> >  On 8/6/07, Harley <CoolGuyHDB at sbcglobal.net> wrote:
>> >    I used a non OEM Tstat from autozone... Lasted less then a week 
>> > before
>> > it
>> >    failed. Don't know what it is.. but it just doesn't work properly. 
>> > Buy
>> > it
>> >    from Toyota.... Its not THAT much more than the one you would buy 
>> > from
>> > your
>> >    local parts store.
>> >
>> >    - Harley(87t)
>> >    ----- Original Message -----
>> >    From: "Jeff Mohler" <speedtoys.racing at gmail.com>
>> >    To: "Bob" < bob at hairballcreations.com>
>> >    Cc: <Charismatisch at aol.com>; <supras at supras.com>
>> >    Sent: Monday, August 06, 2007 2:21 PM
>> >    Subject: Re: [Supras] Thermostat question
>> >
>> >
>> >    > Note to all on list that didnt read that closely..
>> >    >
>> >    >
>> >    > OEM thermostat only, if you dont go OEM, odds are we'll be hearing
>> > from
>> >    > you
>> >    > soon after using a non OEM Tstat wondering if you have a BHG, when 
>> > in
>> > fact
>> >    > you didnt get an OEM thermostat.
>> >    >
>> >    > On 8/6/07, Bob <bob at hairballcreations.com > wrote:
>> >    >>
>> >    >> I can't give you a simple Yes or No answer.
>> >    >>
>> >    >> I would lean toward no but just replace the thermostat with an 
>> > OEM
>> > unit
>> >    >> and
>> >    >> you will be sure...
>> >    >>
>> >    >> Bob
>> >    >>
>> >    >> -----Original Message-----
>> >    >> From: supras-bounces at supras.com [mailto: 
>> > supras-bounces at supras.com]
>> > On
>> >    >> Behalf
>> >    >> Of Charismatisch at aol.com
>> >    >> Sent: Monday, August 06, 2007 1:13 PM
>> >    >> To: supras at supras.com
>> >    >> Subject: [Supras] Thermostat question
>> >    >>
>> >    >> Hi guys and gals,
>> >    >>
>> >    >>
>> >    >> simple question:-
>> >    >>
>> >    >> If the thermostat doesn't open fully, can the car show signs of
>> >    >> overheating
>> >    >>
>> >    >> when driven at top speed (i.e. airbubbles in expansion-tank, air 
>> > in
>> >    >> rad.pipes,
>> >    >> temp. gauge goes into the red)?
>> >    >>
>> >    >> At normal speed the car is fine - if I speed it up, I get the
>> > typical air
>> >    >> in
>> >    >> the system, bubbling in the expansion tank, and temp gauge goes 
>> > into
>> > red
>> >    >> (not a BHG - that was repaired about 600 miles ago along with all
>> >    >> the  other
>> >    >>
>> >    >> gaskets!).
>> >    >>
>> >    >> As I only drive it in the summer a pal of mine suggested taking 
>> > the
>> >    >> thermostat out completely and sealing the housing  -  fors and
>> >    >> againsts??
>> >    >>
>> >    >> Any answers much appreciated!
>> >    >> Derek from Germany 88T Automatic.
>> >    >>
>> >    >>
>> >    >>
>> >    >>
>> >    >>
>> >    >> ************************************** Get a sneak peek of the
>> > all-new
>> >    >> AOL
>> >    >> at
>> >    >> http://discover.aol.com/memed/aolcom30tour
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