-------------- 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