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I am having an overheating issue on a 2000 RD 690
The water pump went about a month ago. We change the pump, fan clutch, thermostat
Everything good. Few days later, overheating.
changed all sensors on the manifold and all sensors for gauges-
Good for a few days-then again overheating
We flushed the intercooler and radiator. Not losing any antifreeze in the head. Took to 1 mechanic said it was the head
took to Mack dealer they are not sure, they said maybe internal.
Maybe when the pump went something went inside Any input on this greatly appreciated.