The Big Cam IV engines are great to work with, especially the later 88 NT’s. The only problem these engines have is the low flow cooling system. They can easily overheat in demanding situations, particularly in the summer heat.
Peter Sharp, Vice President of Pittsburgh Power, has been working with the Big Cam Cummins for over 30 years. He highly recommends that you revert the low flow system back to the high flow system used on all Small Cam and Big Cam I, II, and III engines. We at Pittsburgh Power can convert the low flow cooling system back to full flow. If you have an early Big Cam IC this can be done with used parts off a Big Cam II or III and a new radiator or water pump.
If you have the new Big Cam IV or 88 NT, you will have to also buy a new front water manifold section and thermostat housing. If your radiator core is good and you know a competent radiator shop, they should be able to reuse your core and install new tanks and save you some money. We will ensure you have all the parts needed to convert your low flow engine to full flow.
Regardless of the horsepower output of the engine, the high-flow system that Cummins used through 1985 worked superbly. We never experienced high water temperature so long as the radiator, water pump, and radiator cap were functioning properly. Pittsburgh Power has the complete kit available.
Pittsburgh Power Inc.
Many of the articles compiled here where written by Bruce Mallinson. Attribution to other contributors is given in the specific articles.