DCR Posted January 23, 2011 Share Posted January 23, 2011 What should the normal running temp be on a END673 engine? I have a 1958 B61 and let it run today for over an hour at 1500 RPM and the temp gauge only went to the first line past the 100 mark. I am assuming that this is the 100 degree mark. The whole time the engine was running the shutters were closed tight and I was not getting any heat from the defrosters. I am thinking that I need a new thermostat. What is the proper temp setting for the thermostat or is there something else I should look at. Thanks.Denny Quote Denny330-550-6020A "Mack Pack" Charter Member Link to comment Share on other sites More sharing options...
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