Symptoms and consequences of excessively high excess pressure

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Damage to sealing rings (shaft seals).
Oil dipstick slips out.
Increased oil consumption.
Oil in the air mass system after the point of introduction in the crankcase ventilation system.
Oil flow rate in the bearing of the exhaust turbocharger is reduced by the counterpressure in the oil return. This results in a risk of coking of the oil ducts in the exhaust turbocharger.