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Bulent Aliev wrote:
On 3/19/05 10:06 AM, "Russell Duffy" <13brv3@bellsouth.net> wrote:
Greetings,
I'm looking for ways to put a coolant level switch in the engine,
and remember that the FD had a level sensor. I never looked it one
of these before, so I'm wondering how it worked. Does anyone have
one they can look at, or perhaps send me if you don't want it?
Does is have some sort of float in it? I have an extra 1/4" NPT
hole in my upper water pump housing, which would make a great
place for a switch, but I haven't found one that seems like it
would work there very well. Did the FC use level switches?
Thanks,
Rusty (top secret lower cowl being test fit today)
Hi Rusty, I don’t think coolant level switch should be on your water pump. If the coolant level drops there, it is too late. The pump will cavitate very very soon. (assuming is the stock pump). I would install it in the expansion tank or overflow tank. When the coolant drops there you will have more of a chance to head back before the pump gets exposed.
Buly
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
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