[DeTomaso] Front mounted A/C

[MikeLDrew at aol.com]

In a message dated 6/5/14 15 34 8, demongusta at me.com writes:


> Can someone define "overheating"?
> Other than the obvious - seizing the motor
> 

>>>Well, there is an optimal temperature range for an engine.   Ford says 
it's 192 degrees, but just to be on the safe side I try to run mine around 
180 degrees.

Water boils at 212F at sea level with no pressure.   But the boiling point 
goes down as the elevation goes up due to lower pressure.   A radiator cap 
adds positive pressure (13-16 lbs is optimal) which raises the boiling point, 
so that water will stay in liquid solution up to about 260F.

Once you pass the boiling point, very bad things happen.   The water turns 
to steam, the engine cools unevenly, heat is unable to escape, pressure 
skyrockets as water turns to steam (a water droplet expands to 2500 times its 
size when turned to steam), the radiator cap vents and dumps water on the 
ground, the heads can warp, head gaskets blow, water sprays everywhere, your day 
is done and your engine is cooked.

Note that modern cars are designed to run at hotter temps and it's 
apparently quite common to see 230-240 degrees.   I don't own anything modern so 
I'll stick with 180-200 thank you!

There is absolutely no reason for a Pantera to overheat.   Most Panteras 
that I've seen that were running hot, were doing so not because of any fault 
with the system, but rather due to poor maintenance--the owner had not 
properly bled the air out of the cooling system.   Air is a terrible thing to have 
in your cooling system and will lead to all sorts of problems.

While it is possible to get perhaps 95% of the air out using conventional 
bleeding techniques, a vacuum-based bleeder such as the one I demonstrated on 
Youtube a couple of weeks ago gets you close to 100% effective and is much 
mo' bettah.

Mike
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   In a message dated 6/5/14 15 34 8, demongusta at me.com writes:

     Can someone define "overheating"?
     Other than the obvious - seizing the motor

   >>>Well, there is an optimal temperature range for an engine.  Ford
   says it's 192 degrees, but just to be on the safe side I try to run
   mine around 180 degrees.
   Water boils at 212F at sea level with no pressure.  But the boiling
   point goes down as the elevation goes up due to lower pressure.  A
   radiator cap adds positive pressure (13-16 lbs is optimal) which raises
   the boiling point, so that water will stay in liquid solution up to
   about 260F.
   Once you pass the boiling point, very bad things happen.  The water
   turns to steam, the engine cools unevenly, heat is unable to escape,
   pressure skyrockets as water turns to steam (a water droplet expands to
   2500 times its size when turned to steam), the radiator cap vents and
   dumps water on the ground, the heads can warp, head gaskets blow, water
   sprays everywhere, your day is done and your engine is cooked.
   Note that modern cars are designed to run at hotter temps and it's
   apparently quite common to see 230-240 degrees.  I don't own anything
   modern so I'll stick with 180-200 thank you!
   There is absolutely no reason for a Pantera to overheat.  Most Panteras
   that I've seen that were running hot, were doing so not because of any
   fault with the system, but rather due to poor maintenance--the owner
   had not properly bled the air out of the cooling system.  Air is a
   terrible thing to have in your cooling system and will lead to all
   sorts of problems.
   While it is possible to get perhaps 95% of the air out using
   conventional bleeding techniques, a vacuum-based bleeder such as the
   one I demonstrated on Youtube a couple of weeks ago gets you close to
   100% effective and is much mo' bettah.
   Mike