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Hello, does your DIESLE have the (OIL SEPERATOR) or (PCV FILTER) set-up for crankcase ventilation?
My techical documentation is not 100% clear on which system it uses. (PCV) is used on DEISLE ENGINES (POSITIVE CRANKCASE VENTILATION) which will cause the exact symptom you describe.
It looks like it may have a (PCV) valve filter #2 that can cause oil consumtion or an (OIL SEPERATOR) #3 that is allowing oil into the air filter housing. One or the other should only allow crankcase (vapors) and not oil. Take a look at these systems, you see the hose that goes to the air cleaner housing is where the oil is being sucked in or #2 you see the PCV Air Filter
Yes my freind this problem is in the (PCV) system (POSITIVE CRANKCASE VENTILATION) or the OIL SEPERATOR SYSTEM.
That system is only suppose to allow only fuel vapors to pass through, not engine oil...