Thread: Where to mount a block over-temp alarm? (Engine Watchdog Tm2)

Id tip a bolt on the back end of the head somewhere. near the firewall where air movement would be a minimal influence.

I'm thinking of getting one of these as well.

I was thinking about epoxying it to the block somewhere, which I reckon would heat up the quickest in a coolant loss situation.

But... having thought a bit more about it, I wonder if the epoxy would insulate the thermo couple in the sender? Also would the empty coolant jacket be a bad heat conductor?

Anybody got any thoughts?

I think I'd go with Blknight on bolting towards rear of motor under the acostic cover where there is minimal air flow to cool it and use a bit of thermal paste like used on computer CPU chips to Heatsink.

I am looking at getting one of these too.

The other thing is to find a good spot to mount the display unit. (I have a defender too but 300tdi)

Looking forward to seeing what you come up with - please post pics!

Cameron

I personally reckon by the time the block has heated up enough to set off the alarm then it is all over.

I prefered the low water alarm. (thats until it went faulty)

Now about getting that fixed

Originally Posted by DiscoDan

I personally reckon by the time the block has heated up enough to set off the alarm then it is all over.

I prefered the low water alarm. (thats until it went faulty)

Now about getting that fixed

But this one is ment for when the block overheats without loosing coolant

Originally Posted by DiscoDan

I personally reckon by the time the block has heated up enough to set off the alarm then it is all over.

I prefered the low water alarm. (thats until it went faulty)

Now about getting that fixed

Nope.
Even though I have a V8, I don't think it would be too different to a diesel in terms of heat transfer (that's an assumption ).
My temp sensor from my TM2 is bolted to the back of one of the heads. The head temp at the back sits at 2 deg below coolant temp once warmed up. As my thermo's turn on at 92 deg, the head doesn't go over 90.....so I've set the alarm at 92. It's gone off a few times offroad when I knocked my thermo fan switch to the off position. Plenty of warning, plenty of time to turn the fans back on, and not even close to damaging anything.

Cheers
Andre

On the rear of the drivers side cylnder head facing the firewall should be some bolt holes for the lifting lug mounts - I believe this is better (closer to the heat source) than than the thermostat mounting bolts, with the added advantage of not disturbing gasketed parts......

Alloy conducts heat very well so should be responsive to temp changes at this location