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Overheating Sensor

Saw this overheating sensor on eBay for $99. Thought it may be a good thing?

http://www.ebay.com....

Might have saved Michael's new motor.....

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I'd like to test one out. I fitted a low coolant alarm to the top radiator hose on my wife's Discovery after it got cooked (by me!).
The good thing about this unit, provided its good quality, is that it still reads the engine temperature even if you lose your coolant. With a water temp gauge it will read cold if you lose your coolant suddenly because the sensor has no water contacting it to read the temperature of.
The Disco has an overheat sensor that's screwed into the cylinder head. I think many modern cars use this instead of a coolant temperature sensor. First I knew it had a problem was when it started cutting the injectors as an engine saver function.
What I'm saying in all this is that to be foolproof you need both a low coolant warning system plus a separate engine temperature/ overheat warning system. You can overheat your engine due to a blocked radiator or stuck thermostat but still have full coolant levels, and you can lose all your water but not have the temperature gauge pick it up.

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All good points Dave.

How about this one?

http://www.ebay.com....|Plat_Gen%3AHQ&hash=item1e986e42fa

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"It was then I knew I'd had enough, burned my credit card for fuel
Headed out to where the pavement turns to sand...."

Cheers, John

Sounds interesting!
I don't know if Michael had a temperature gauge in the car or whether it registered hot if there was one(and we don't always look at it)
If this setup works well and is good quality and fitted properly, then that can only be a good thing. Should save your engine from all sorts of overheating senarios!
Every old Holden I've owned has had a Smiths mechanical temp gauge fitted and everyone has had dramas with overheating as I learnt the limitations of standard cooling systems and modified engines!

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