Thread: Low coolant alarm sensor position question

Originally Posted by big guy

Hi

I have a low coolant alarm on my tdi Disco, its located in the top radiator hose next to the intercooler.
Thing is, its mounted under the hose with a little plastic insert that is supposed to help seal the hose onto the radiator.
It keeps leaking no matter how hard I try.
I do not want to be stranded somewhere when it decides to leak again.

Question is, is there a inline unit that can go in the top radiator hose and not leak all the time?

Your supposed to silicon on the rubber or plastic sleeve to the snout of the radiator, In saying that i mounted mine on the thermostat housing but siliconed the whole thing as well as over it

Or get a sensor like this

I have modified mine though, I replaced it with a brass plug and tapped a hole down the middle for the stainless screw

That looks good.
I have brass plugs of course, just not the time to make the mods.

Where do I get one.
I like what i see.

Originally Posted by big guy

That looks good.
I have brass plugs of course, just not the time to make the mods.

Where do I get one.
I like what i see.

Mods are very easy all you need is a (off the top of my head) 3.5mm drill and 4mm metric tap

I got my sensor from Engine Saver.

Engine Saver Land Rover Page

May be worth sending Davy a PM, he might be able to hook you up with something

Just took a pic, here's the brass one



And yes I'm just about to go out and fix that O-Ring before I forget again

As mentioned contact Davy (Mr Enginesaver himself!!!)via PM.He can supply later update sensors as shown for TDi and V8 motors plus the TD5 updated sensor.
Andrew

Question

By putting the sensor into a brass plug won't that create an open circuit? Causing the alarm not to work. I thought that’s why it was a plastic plug so when the level dropped and the sensor was exposed that then created the circuit for the alarm to work.

Originally Posted by Phantum

Question

By putting the sensor into a brass plug won't that create an open circuit? Causing the alarm not to work. I thought that’s why it was a plastic plug so when the level dropped and the sensor was exposed that then created the circuit for the alarm to work.

Thats exactly what I was thinking.

I was thinking the same thing for a while but

The sensor is only a stainless screw

I think it works the other way, when the circuit is broken it activates the switch.

Being an ex chemistry student this would make sense, I imagine coolant would be an aqueous solution. Therefore it would more than likely conduct electricity. So when the coolant drops, it breaks the circuit and the alarm goes off

Make sense?