Posted 5/26/2023 15:41 (#10244661 - in reply to #10244292) Subject: RE: detroit diesel running cool-bad gauge or sender?
Wisconsin
Yes, the thermostat not closing is the most likely. Unless you have a capillary tube gauge (small brass tube connecting the gauge and "sender") that could easily start to leak and read lower temp.
detroit diesel running cool-bad gauge or sender?
