Thread: Low coolant alarm?

I have fitted a Little Black Box with a float switch.

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Installation: http://www.littleblackbox.co.za/Rang...MS_Fitment.pdf

Contact Jan (The Entertainer) on this forum.

Hi

I have recently researched this and there seem to be a few options;

1) Late model RR classic cap has an sensor in it.

2) BMW coolant tank which includes a sensor (check rr.net for details)

3) BMW sensor fitted to rangie coolant tank.

4) Little black box or other engine temperature systems.

5) DIY sensors.

I like the idea of an engine temperature monitor, but I don't want yet another display and box i need to find somewhere to mount !

I have decided to go wiht a DIY sensor, so I purchased this kit

LOW Water Level Alarm 12V Built AND Tested | eBay

It allows me to add an LED plus a buzzer which can be added to my dash without major mods and without a box to mount somewhere.

I have a couple of 75mm stainless steel self tappers which i intend to put through the top of the coolant tank. If it is going to leak, better steam than water i figure!

I will take pics when i do it and let the forum know

Steve

Originally Posted by SteveFarmer

I have a couple of 75mm stainless steel self tappers which i intend to put through the top of the coolant tank. If it is going to leak, better steam than water i figure!

My Little Black Box (LBB ) came with a SS screw for water level detection. It was unreliable so I fitted the float valve.

One reason I went with the LBB was that it monitored more than water level. The overheat alarm on a P38A is a tiny red light that is almost impossible to see in daylight. I was going to put an audible alarm across that light the next time I have the instrument binnacle out.

I use this one as recommended by Stuart a G Cooper. It works well and self tests on ignition.

Rob

LOW Water Level Alarm 12 24V | eBay

Hi,

I looked at a few float valves, but the plastic ones only seem to be rated to around 80 degrees, plus there was the issue of how to fit it.

False alarms may be an issue, in which case i may need to add a delay timer as detailed on rr.net

I intend to put the buzzer just under my dash, and the (very bright) LED somewhere pretty noticeable!

I don't think hooking it up to the low windscreen washer alarm is such a good idea either.

Steve

The temp rating of the float valve doesn't seem to have been an issue - I've had mine for over 5 years.

The unreliability of the probes seemed to be related to water conductivity as it used a single screw in the tank and the current path was from that to chassis/engine block.

Hi

It is worth reading this thread

Coolant Level Sensor

and the associated ones ;-)

Steve

Originally Posted by p38arover

The temp rating of the float valve doesn't seem to have been an issue - I've had mine for over 5 years.

The unreliability of the probes seemed to be related to water conductivity as it used a single screw in the tank and the current path was from that to chassis/engine block.

Ron,

I thought maybe there were some more highly rated ones available, there are stainless steel versions i saw.

The system i got uses 2 screws, so it may be more reliable, I imagine the current path a single screw requires could be a bit iffy !

Regards
Steve