Low temp on guage

["mcookwwi" <mark@xxxx>]

When I first purchased my D, it ran very hot, at or above the 220 
mark. I replaced all the coolant lines, flushed the system, and 
installed the constant bleed system. Then it started barely hitting 
the first mark (100). I figured I may have a bad thermostat, so I 
just replaced it, expecting the temp to reach above 100 now.

Well, it stays right at 100 when I'm driving OR idling now. Does 
anyone have any idea why this engine runs so cool? I would feel more 
comfortable if it were around 180.

#10901