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From: Dale Rogers <dale.r@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Coolant Leak
Date: Mon, 27 Jun 2005 10:10:06 -0400
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No need to get exotic, Al; the '91 and later Olds Achieva 
used the same setup (pressure cap on the expansion tank, 
which is higher than the radiator and engine.)  Oh, and 
the Pontiac Grand Am, and Buick Skylark are the same car 
as the Achieva.  Lots to choose from at the wrecking yard.

Dale R.

 
> From: al p wick <alwick@juno.com>
> Date: 2005/06/27 Mon AM 06:34:16 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: Coolant Leak
> 
> Thanks so much Al G, you too Georges. I was not familiar with that type
> of system. That also seems to support some of Ians statements. I'll head
> to Volvo area next time I go to wrecking yard. That's why I couldn't
> understand Georges statement. 
> 
> -al wick
> 
> On Sun, 26 Jun 2005 22:27:10 -0700 "Al Gietzen" <ALVentures@cox.net>
> writes:
> I'm sorry Georges, I don't understand your statement.
> All auto cooling sys I'm familiar with have rad cap on top of radiator.
> They are designed to have no air in the cooling system. Shortly after you
> start up the car, coolant flows from cap 14psi valve to overflow bottle.
> This pressure increase is entirely due to coolant expansion due to heat.
> When you shut car off, the pressure drop in the radiator draws in coolant
> from cap 1 psi valve connected to  overflow bottle back into the
> radiator. Thus the radiator is always full to top.
> 
> Al W.
> 
> Mercedes, Volkswagon, Volvo (to name a few) have/had radiators with no
> cap, connected to an expansion tank that you fill about half way.  The
> expansion tank ? higher than the top of the rad -  has the 13-15 psi cap.
> 
> FWIW;
> 
> Al G.
> 
> 
> -al wick
> Artificial intelligence in cockpit, Cozy IV powered by stock Subaru 2.5
> N9032U 200+ hours on engine/airframe from Portland, Oregon
> Prop construct, Subaru install, Risk assessment, Glass panel design info:
> http://www.maddyhome.com/canardpages/pages/alwick/index.html
>