[Supras] Thermostat Question Again!

[CoolGuyHDB at sbcglobal.net]

I was thinking the same thing... My fan clutch went out and showed the same symptoms.
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-----Original Message-----
From: "Jeff Mohler" <speedtoys.racing at gmail.com>

Date: Tue, 7 Aug 2007 08:38:52 
To:"Charismatisch at aol.com" <Charismatisch at aol.com>
Cc:supras at supras.com
Subject: Re: [Supras] Thermostat Question Again!


How is your fan clutch??

On 8/7/07, Charismatisch at aol.com <Charismatisch at aol.com> wrote:
>
> Hi there guys and gals,
>
> I am sorry to have triggered-off such an argument with my question,
> however
> my problem still remains the same.
>
> The radiator is brand new, so are all the gaskets (inclusive valve shafts
> and HG). I did a full oil-change and coolant-change with the HG and
> replaced the
> plugs. The whole fan and clutch is also brand new.
>
> If I stay in town traffic, the temp gauge never goes above the  halfway
> level
> and the car runs beautifully and shows me a full radiator once it  cools
> down
> and I am able to open the rad.cap. The heating blows hot after about  a
> minute already, indicating to me that the thermo is functional at
> the  beginning.
>
> Once I take the car onto the Autobahn at 150+ mph and as long as it
> is  being
> cooled by the air from the front, the temp stays ok. When I come off the
> Autobahn and reach the first stop sign, the temp slowly climbs into the
> red and
> comes back down a little when I drive off again. When I reach home, the
> water
> in  the expansion tank is gurgling. After spewing a little, the rad. shows
> me
> too  little water.
>
> Also, the main rubber pipe to the rad. at the top is often warm/hot and
> has
> some air in it, whereas the bottom rubber pipe from the rad. to the engine
> is
> cold or cooler. This would seem to indicate, that the flow of the water is
> getting partially 'stuck' or 'slowed-down' somewhere, which may mean,
> that  the
> thermo is not functioning fully and creates a kind of 'tailback' or
> 'congestion' in the system and is not allowing it to flow fast enough when
> the  engine
> is under duress.
>
> As a layman I would think that the thermo is closing fully when cold
> (hence
> the heating working soon and well at first), but not opening fully when
> the
> coolant/water mixture is hot. This wouldn't become apparent at slow
> speeds/town
> traffic, but under strain at 150 mph the thru-flow would not be sufficient
> once  the car comes to a hot standstill.
>
> Your comments please??.
>
> Derek, 88T Automatic.
>
>
>
>
>
>
>
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