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Cummins’ 5.9L diesel engines ... It’s one of those parts we rarely pay attention to until oil leaking from the engine catches ... Cummins vacuum pumps tend to leak oil where the power ...
When Cummins began adding electronics to its 5.9L engines, though, changes were deemed necessary. A Carter lift pump was added to the 24-valve trucks under the hood, next to the injection pump.
With the success of the P7100 injection pump in the 5.9L Cummins engine and beyond, custom P-pumps have started popping up.