Thread: 300Tdi coolant level sensors

One of this forums sponsors does these things

Have a look at

Low Water Alarm Sensor

a RRC cap with inbuilt float also fits.

There is an excellent write up using the 'Little Black Box' float switch (available separately) here http://www.aulro.com/afvb/projects-t...hotos-etc.html

Take a look at RS components site they have a lot of temperature and chemical resisitant float switches.

RS Components Australia - RS Components is the leading high service level global supplier of Industrial components and tools, with over 56,000 products despatched same day.

This is also an interesting discussion on the best place to fit a low coolant sensor.

http://www.aulro.com/afvb/projects-t...hotos-etc.html

Coolant level sensors are not an end in themselves, just hopefully a means of detecting overheating before damage is caused to the motor. I think probably the cheapest and most fail safe system, which I have, is a temperature sensitive switch on the head which opens at 105 degrees in the wire to the fuel solenoid on the injector pump. With some causes of overheating it will stop the motor before any water loss occurs and if due to water loss not caused by overheating, soon after and before it causes damage.

Note with this setup in place on my 300Tdi Defender, I have not replaced the fan and shroud since changing the timing belt last May, but carry them around in case needed. Have done several other small things to allow better air flow through the radiator and intercooler. The only time the motor has stopped so far from needing a fan was when it was left idling for about half an hour on a hot day. Earlier have had motor stop despite fan due to combination of heavy load, hot day and radiator core full of insects, etc.

Mine is in the blank on the top of the radiator, works a treat

I have a engine saver alarm , I mounted the probe under the top hose on the Thermostat housing as that is the highest part of the motor , And works fine for me

I like the idea of the audible alarm that bolts external on the head, seen them on evil bay not long back but cant seem to find them now. I want a couple if some one knows where to source them. I find that temp gauges and lights just aint quick enough (or dont grab your attention quick enough), mybe my sinic mind thinks that car manufactures do this on purpose as it would cost very little to put an audible alarm in when building the things (like why do you want an alarm to tell you you have left ya bloody lights on, very visible and not one to warn you you are about to spend big money on an overheaded engine)
cheers
blaze