Low water light came on, but...
As I was going up a long grade the low water light came on but the temp gauge showed perfectly normal. Got to the top of the grade and pulled over to check everything. No coolant is leaking anywhere t...
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Mine came on while climbing a 6% grade and the computer actually turned the engine off. Called Cummins and they said that the sensor was at the front of the engine and if you are even a little bit low you can get a bubble up front when going up a hill. I topped of the tank and was good to go. I later found that the lower hose clamp at the radiator was a little loose and I had a very slow drip there. Interestingly, Cummins told me to use plain old green ethelene glycol, not the long life stuff. I guess that goes along with their instruction not to use synthetic oil either.
