Thread: Coolant temp sensor warning

Have you looked at an Engine Saver?

https://www.davesitshop.com/emporium/esslr2.html

Originally Posted by alien

Have you looked at an Engine Saver?

https://www.davesitshop.com/emporium/esslr2.html

Looks exactly what I'm looking for. Any experience using this? Any pics/videos w/ the setup?

The "Engine Saver" is a low coolant alarm, not a temperature sensor.

I'm not getting into the argument about which is the better system, but it measures loss of coolant rather than coolant temperature.

I had one on my D2 after cooking the head on my 300TDI D1. Very simple install and very effective. Relies on the principal of coolant conducting electricity and muting the alarm. No coolant, no conductivity, loud alarm.

Regards,
Tote

Originally Posted by billnus

Hi all. Wondering if and what you use for your coolant temp sensor warning for a Defender 300tdi. I want both a warning light and buzzer. Recommendations and info on your setups would be fantastic. Thanks in advance.

I bought an Engine Guard sensor & alarm.

Engine Guard - Product Overview - Engine Guard

My engine is a TD5 & I mounted the sensor under one of the top hose flange bolts where the coolant emerges from the head.

It gives a temperature reading in real time from the point where the sensor is mounted. In my case it may be a degree or so less than the internal coolant temperature, but it is sudden change which the unit is designed to monitor.

By trial & error one needs to calibrate the unit to determine a maximum temperature which, if exceeded, will trigger the alarm. In my case the normal running temperature on a medium day (20-25C ambient) is about 85C rising to 88 or so after a 5th gear hill climb. I have mine set to an alarm temperature of 95C & so far it has not triggered in highway use. I haven't done a fully loaded bush trip with it yet, but I suspect that a long low-range climb on a hot (30C+) day would trigger it.

It is in best practice to keep the trigger point as low as practicable in order to maximise protection.

It works very well, & gives a surprising indication of how the engine temperature varies under different ambient temperature & load conditions. The standard temperature gauge, being controlled from the ECU, doesn't vary until it's too late!

Hope this helps.

Cheers,

Lionel