Cummins ISL oil consumption

[Paul Anderson]

The postive crankcase pressure is due to Bad intake valve guide seals. These seals are taken out by the turbo pressure. Cummins has a recall on the high crank case pressure, that calls for a recalibration of the turbo followed by replacement of the valve guide seals. If you hook up cummins insite program you can actually monitor the crankcase pressure and see if it is out of spec when driving. This had to be done to all four of our ISL's