[DeTomaso] Front mounted A/C
John Donahue
demongusta at me.com
Thu Jun 5 23:48:02 EDT 2014
Mike:
We'll put. Two things: 1) can you send the link to that You Tube video?; and 2) I use an old Stant radiator pump to bleed the cooling system - don't know the percent though. But it makes me feel good, because to me, it makes sense.
> On Jun 5, 2014, at 8:00 PM, MikeLDrew at aol.com wrote:
>
>
> 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
-------------- next part --------------
Mike:
We'll put. Two things: 1) can you send the link to that You Tube
video?; and 2) I use an old Stant radiator pump to bleed the cooling
system - don't know the percent though. But it makes me feel good,
because to me, it makes sense.
On Jun 5, 2014, at 8:00 PM, [1]MikeLDrew at aol.com wrote:
In a message dated 6/5/14 15 34 8, [2]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
References
1. mailto:MikeLDrew at aol.com
2. mailto:demongusta at me.com
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