[DeTomaso] Bleeding the cooling system

[Tomas Gunnarsson]

Mike,
 
Air will not collect like that in the engine as long as there's enough
water in the system to allow the water pump to push water into the
block. As long as the pump has water supply to fill the block and the
thermostat neck high enough to run over into the tube going away from
the engine no air pocket should be present in the engine. There will be
two air pockets. One in the radiator, the other in the swirl tank if you
have one. If no swirl tank is present, the rear air pocket will be in
the thermostat outlet tube if the system is plumbed in a reasonably
conventional way.
 
Filling an empty system with the rear of the car jacked up is however a
way to ensure that the engine contains a certain amount of air. Hence my
surprise when I over and over hear that it's the best way to fill the
system.
 
Tomas

<-----Ursprungligt Meddelande----->
From: MikeLDrew at aol.com [MikeLDrew at aol.com]
Sent: 2/4/2013 1:34:54 AM
To: guson at home.se
Cc: detomaso at poca.com
Subject: Re: [DeTomaso] Bleeding the cooling system


In a message dated 4/1/13 13 39 2, guson at home.se writes:




	I beg to differ. As soon as you start driving the car it will
see G-forces much greater than those induced by jacking or parking on a
slope. There is no possibility that air would be trapped in the straight
under car tubes after that.
	


>>>No.  Instead, the air that WAS trapped in the pipes before you
started driving, will now be trapped in your engine!  And you're
driving!

And overheating.

The point of the exercise is to purge the system of air (as much as
possible) *before* you start driving it.

There was a significant incident that happened many years ago to a new
Pantera owner here in PCNC land, named Walter Villere.  He bought his
Pantera from a police auction, a rather scruffy but solid Euro GTS, and
only paid $13K or something like that.  One side was beat up because it
had been parked in a fenced lot right against the fence, and the wind
had whipped the fence and battered the side of the car.  But the damage
was all rather trivial.

Walter knew a lot about cars and nothing about Panteras.  First thing he
did when he got it home was to change all the fluids--water and oil.  He
drained all the coolant, then just filled it up and topped it off until
the tank was full, on level ground.  He then closed the cap, and took
off across the Richmond bridge, which started right outside his office.

Walter was/is a maniac.  Great guy, but a maniac.  He wanted to see how
fast it would go, and the bridge is a great place because there's no
place for cops to hide.  Traffic was light so he just ran it up to
redline in 5th gear.  Having a great time, eyes on the road of course,
so he failed to notice that because he hadn't properly filled the
cooling system, the temp gauge was pegged.

BOOM!!!!!!  The engine let go like Krakatoa!

Only AFTER that, and a new engine from Hall Pantera, did he learn the
importance of the proper filling/bleeding procedure....



	> I agree that you want to bleed the radiator and top up at the
rear filler but the jacking is a waste of time.
	


>>>It doesn't cost anything, doesn't hurt anything, and not doing it has
led to at least minor overheating problems in the past.  And the manual
directs you to do it.

So why WOULDN'T you do it?

Mike



<P><p><font face="Arial, Helvetica, sans-serif" size="2" style="font-size:13.5px">_______________________________________________________________<BR>Annons: <a href="http://blimedlem.spray.se/">Skaffa Spray Mail du också - Gratis, enkelt och säkert!</a></font>