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Date: Sat, 19 Mar 2005 10:49:57 -0600
From: Charlie England <ceengland@bellsouth.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] FD coolant level sensor?
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Kelly Troyer wrote:

>  
>  
>
>     -------------- Original message from Charlie England
>     <ceengland@bellsouth.net>: --------------
>
>
>     > The 2nd gen car that's dead in my hangar is dead because I got
>     dependent
>     > on the 'raise the dead' buzzer that went off when the sensor *in
>     the
>     > overflow tank* sensed low coolant. When the upper tank on the
>     radiator
>     > cracked & lost coolant while driving, the overflow tank still
>     had plenty
>     > in it & I never got the buzzer.
>     >
>     > This brings up a potentially significant point. Most folks say
>     to use
>     > system pressure to detect leaks. I can't say from experience
>     that it
>     > works, but I can say that a level sensor in the catch tank
>     *won't* work
>     > to detect in-flight problems because the level there isn't
>     likely to
>     > drop until the system cools & tries to suck coolant back from
>     the reservoir.
>     >
>     > I'll try to take a look at how it works for you some time today
>     when I
>     > take a break from doing my taxes. (Weather induced major change
>     of plan
>     > from flying down to St Elmo for lunch & SQ2000 inspection.
>     Sorry, Paul.)
>     >
>     > Charlie
>     >
>        Charlie and All,
>
>             My 2nd gen (88,4.3L Chev. power) has the coolent level
>     sensor screwed
>
>     onto the top tank of radiator......When covered with coolent all
>     is quiet......but
>
>     as coolent starts to get low it (as makeing a sharp turn) it
>     sounds a buzzer until
>
>     covered with coolent again......Warning you to check coolent
>     level......Sensor
>
>     is a one wire hookup......One would need to check RX7 circuitry as
>     to what is
>
>     necessary to make it work for an A/C........FWIW
>
>      
>
>     Kelly Troyer
>
The rain stopped long enough for me to hike down to the hangar.

Kelly's right; the sensor is in the top of the radiator. Maybe I'm 
remembering the old 1st gen I had a loong time ago. I tried to remove 
the sensor but it refuses to back out of the tank when turned. The hole 
in the old rad tank for the sensor is around 3/8" in diameter so that 
should give you an idea on whether you could fit it where you want it.

Sorry to have misled you originally.

Charlie