KGE licks

Hello everyone!

During my last work on the engine, I noticed that the connecting hose between the crankcase ventilation system and the intake manifold is leaking slightly.
It surprises me, as there should normally be a slight vacuum in the connecting piece between the cylinder head cover and the intake manifold (at least when the engine is running).
Is that round, black part on the valve cover actually a cyclone oil separator, or what's hidden inside that black housing?
The hose clamp on the connecting hose is, incidentally, very tight, and yet a little oil is seeping through some kind of gap and dripping onto the valve cover .

Please explain to me what is inside this casing and how it is possible that a leak is occurring specifically at this location.

Regards,
Alex.

It depends on where the leak is, but I'm not that surprised.

If the hose is leaking, for example, due to damage from a rodent, and there's always a little oil inside while driving, then it will leak out when the engine is off and there's no vacuum. Alternatively, the hose could be blocked somewhere, leading to a buildup of pressure.

Try applying 1 bar of air pressure and using a leak detection spray; you'll be able to see where the leak is.

"Tell me what KGE stands for."

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Tell me what KGE stands for.

Crankcase ventilation

Is that round, black part on the valve cover actually a cyclone oil separator, or what's hidden inside that black housing?
The hose clamp on the connecting hose is, incidentally, very tight, and yet a little oil is seeping through some kind of gap and dripping onto the valve cover .

Please explain to me what is inside this casing and how it is possible that a leak is occurring specifically at this location.
Alex

Hi Donalexo,

The part in question is the pressure control valve for the crankcase ventilation system.
Features: It looks a bit like the Starship Enterprise. It has 2 connections, one of which disappears somewhere under the valve cover, and the other is connected to the intake hose. There's also a small rubber seal between the valve cover and the valve, which tends to deteriorate over time. But be careful when removing or installing the valve, as I've already had to fish that darn seal out from under the valve cover more than once.

Hello,
Is the pressure regulating valve for the crankshaft case ventilation located in the valve cover or somewhere else?

I was at the friendly dealership the other day, and the gentleman at the parts/accessories counter said he couldn't find the valve; he said it should be inside the valve cover. Well, I don't have much faith in the unqualified staff at these car dealerships; "he actually tried to sell me the hose between the intercooler and the intake manifold." That's why I'm asking you again, because a valve cover can easily cost over 100 € .

That always reminds me of the old engines where the parts were just made of sheet metal and only cost a few German Marks.