Cummins ISC, ISL water pump update
Cummins redesigned their water pump on these engines in and around our year, 2002. This pump has larger bearings and more coolant flow.
Annually I remove the belts and spin the pulleys to see if I can feel a bearing problem, water pump was a bit loose. I figured this would also be a good time to do a cooling system conversion to OAT. Purchased the decal for the coolant tank for $.35 from a Freightliner dealer.
Photos;
Rich, I agree on the pump with that impeller, it was a concern but I don’t see them fail like they did 20 years ago when introduced.
I installed a filter without the SCA precharge, with the OAT it’s just like Brett mentioned, no fuss! I will check PH and freeze protection annually for my own piece of mind.
I also installed valves on the heater core and Aquahot water lines, just in case one has an issue I can shut it off and continue on our way.
It took a while to purge all of the