The picture shows the diesel engine of my Innova 2.5G

There is a layer of black, oily grunge accumulated around the small rubber hose near the pcv and on the underside of the large rubber hose.

When the grunge is removed, I can find a small amount of light yellowish oil accumulated around of the joint of the pcv and the small hose after the car has been used for one or two days.

Is this normal in diesel engine as the Toyota technician told me?

Please answer in English.

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