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Originally Posted by seebeexee
True, true... I knew I'd probably get that response at some point, and deservedly-so. I mostly feel the same way, but I've got a pretty bad case of OCD, so knowing what "ideal" is and seeing that I'm not there really drives me nuts! And knowing that it's better for diesels to be a little too warm rather than a little too cold is a good thing still doesn't help, unfortunately.
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If it is any consolation, I have the exact same vehicle and it, too, runs close to 100C. whenever it feels like it. I, too, have replaced everything but the sending unit. Nothing affects the result.
My infrared thermometer does show a slight benefit............93C. on #6 when the gauge shows 100C.
I'm tired of worrying about it..........the engine doesn't care if it runs warm (actually preferable for fuel economy).........why should I?
With a 50-50 mix of Xerex and a pressure of 15 psi, the boiling point is 128C. and the engine can run safely right to 120C. without any issues.