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Thread: TD5 expansion tank, is there a way to fit a low coolant alarm

  1. #11
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    Thanks guys

  2. #12
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    There's a South African outfit called Little Black Box who do monitoring of engines, including water level, and another called Madman who do the same thing.
    I have an early Little Black Box that only monitors water level and it saved my bacon when a hose burst.
    For you guys in Australia, they will be really cheap on the exchange rates.

  3. #13
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    Quote Originally Posted by JohnnoK View Post
    and another called Madman who do the same thing.
    A lot of the blokes on here run the MadMan EMS. There is a local distributor.

    Has anyone set up the MadMan to use probes on the header tank instead? How are those probes fitted and sealed on the side of the tank? They look like machine screws and both their heads and the nuts look to be on the outer side...

  4. #14
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    ....................
    Erased cos it was about D2
    Discovery Td5 (2000), manual, tuned

  5. #15
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    Quote Originally Posted by twr7cx View Post
    Has anyone set up the MadMan to use probes on the header tank instead? How are those probes fitted and sealed on the side of the tank? They look like machine screws and both their heads and the nuts look to be on the outer side...
    My LBB setup has the 2 wires connected to the tank with self tapping screws with a smudge of silicone under them. Even when my head gasket blew and pressurised the system they didn't leak at all.

  6. #16
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    Quote Originally Posted by trout1105 View Post
    Agreed.
    Best solution is to fit the sensor to the expansion tank because by the time the one in the bleed screw goes off the damage is most likely already done, With the sensor fitted to the expansion tank at least you will get some warning of impending doom.
    I have a redarc unit fitted to my D2a V8 which has the 2 holes drilled into the tank for the sensors and the alarm is quite loud and it also makes 3 beeps on startup just to let you know it is working.

    Attachment 144925
    Attachment 144926
    Not sure about TD5 but in the V8 you only have to drop 100mls or so and the alarm goes off using the top radiator hose Engine saver. Very sensitive. Even let's you know if there is air in the cooling system by coming on on startup and shutting off with a rev. Why is td5 set up different? Cheers

  7. #17
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    Not techincally Defender specific, but I had an alluminium header tank made for my D1 TDi back in the day. I had a couple of NPT bungs put in the side of it and used a Capacitive style liquid level sensor in it.
    Alternatively, a float style switch could be used.

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