Re: Diagnosing overheating Cummins 8.3
Reply #14 –
Put your serial number into cummins quick serve and it will have a drawing with part numbers for thermostat, seal, and housing gasket. When I went to local Cummins parts counter he did not order the seal or gaskets. I called after discovering no gaskets and was told they don't use seal or gasket. Not true. The seal was stuck inside the housing on mine. My late 1997 6TA C8.3 325 hp had a single thermostat. I needed two gaskets. Thermostat change improved my cooling. Also did a coolant flush, washed down radiator and charge air cooler. Recently replaced hydraulic filters. Just crossed the continental divide and max temp was 200/205 but held 190 for most grades. I did drop down a gear to spin water pump a little faster on the longest grade. Really enjoying an operational retarder going down. I was running dash AC since generator is leaking coolant.