[Supras] Coolant and rad

[Jim Jobe]

Another problem is air being introduced by pulling the hose
out of the overflow bottle.  The overflow is typically
dirty and thus difficult to see through, so many owners will
pop the lid and pull it up out of the way exposing the
end and thus draining the hose of coolant.  Guess what
happens next...engine cools and pulls air in.

So if this is your habit, try to avoid pulling the hose
out by either pushing the cap to the side to look in or
cleaning out the overflow bottle so you can read it from
the outside.

On Tue, Aug 07, 2007 at 12:34:49PM -0400, Charismatisch at aol.com wrote:
> Hi list,
>  
>  
> the radiator and coolant are brand new and at the correct levels. Also, the  
> fan and clutch are brand new OEM parts.
>  
> I replaced the thermostat just before the BHG repair, thinking it could be  
> the reason for my problems, but it wasn't. Still had the symptoms, so did the  
> BHG-repair, which was well worth it (gasket was completely porous, corroded  
> and brittle).
>  
> I still have the 'old'  thermostat, which I kept, so I am thinking  I'll put 
> it back in for the hell of it and try it out.
>  
> Problem is, after a BHG, no-one wants to muck around and let the engine get  
> too hot too often! Too much work and too many $$!
>  
> The amount of possibilities for the cooling-system of a Supra not working  
> correctly are so numerous, that I am seriously thinking of getting rid of  the 
> thing, although I really love the whole rest of the car and have had it  since 
> 1996!
>  
> So far I have heard the following reasons for a possible  overheating:-
>  
> 1) Timing not correct (questionable)
> 2) Fan or fan-clutch defective
> 3) The dreaded BHG
> 4) Thermostat defective
> 5) Not enough coolant
> 6) Blockage between the two rads
> 7) Radiator cap not working correctly
> 8) Airbubbles in the water/cooling system
> 9) Blockage/dirt somewhere in the cooling system
>  
> and I am sure there are several more!
>  
> So on we go with the search for the overheating under duress - I will carry  
> on only town-driving till then, but on the other hand - who wants a sports  
> car, but drives at 50 mph all the while??
>  
> Derek 88T Automatic.
>  
>  
> 
> 
> 
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