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Old 12-05-2004, 16:45   #1 (permalink)
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Coolant danger

How does the low coolant warning signal work. My EA does not have one and it would have saved my engine from overheating about two years ago when the coolant cap was left off. The computer shut off the engine and there has apparently not been any damage. The older cars had the radiator cap at the front of the engine and it was easy to see if was missing.
I have been thinking of fitting an alarm, and using the conductivity of the coolant would seem to be the way to go but my experience with boats warns about any electrical currents in water. The smallest current will cause corrosion.
A system using light which would give a signal if the light was changed by the water level. A laser pointer light looks promising. The wiring could connect to a connector on the cap so it would have to be removed if the cap was removed and would be part of the warning circuit.
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Old 12-05-2004, 16:54   #2 (permalink)
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Re: Coolant danger

Low coolant sensor, is a plug in to the overflow bottle, you can se the place that it goes in (where the plastic screw thread part in the side is) you have to remove the plastic to make a hole then slot the sensor in, wire up the wires and hook them to a bulb in the dash (may already exist) spope has done this to his car drop him a PM.
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Old 12-05-2004, 18:21   #3 (permalink)
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Re: Coolant danger

its generally done using a float too...
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