Oil in Wastegate pressure chamber!

Hi

I've now got my turbo sitting here on the bench, and there's a fair bit of oil leaking out of the wastegate housing.

How much can be inside there???

http://www.luxus-wg.de/~martin/auto_bilder/Oel_in_wastegate_dose2.jpg

m;

Hi Martin,

I don't understand how the oil gets in there. I don't know the regulations for your motorcycle.
However, I see two possibilities:

- The wastegate is pressure-controlled and obtains the reference pressure from the compressor housing. In this case, the oil would have to come from the radial seal of the turbocharger, or from the crankshaft case ventilation. But if you're not burning oil, then I wouldn't worry.

- The wastegate is controlled by vacuum via the vacuum pump and a PWM valve. I don't see how oil gets into the housing. It's like Nutella on a towel. An endless mystery. I wouldn't worry about that either.


No matter how I imagine it, there can't be too much oil in there. It will also function properly even when it is full of oil.
But maybe I'll see things differently if someone explains how the oil gets in there.

@dieselmartin:

It depends on how the channeling is implemented in the 1Z.
Assuming that the boost pressure is taken off at the intake bridge or the compressor housing, then it is "contaminated" intake air, loaded with oil mist from the KGE (compressor-air-guide-unit) and/or the radial seal of the compressor,
Now, if the hose runs directly from the filling point to the pressure cylinder and then to the filling pressure control valve, then, especially with filling pressures above 0.6 bar, good air is actually pushed through the control line, because then the control valve opens to reduce the pressure in the cylinder. Here, fine oil droplets can be carried along.
But even if the path from the fuel supply to the control valve and from there to the pressure gauge goes, oil can still get into the pressure gauge, and that happens when the valve is installed higher than the pressure gauge on the turbocharger.
The valve is within the operating range, resulting in a noticeable airflow. Consequently, oil is transported to the valve. This oil can then flow calmly downhill towards the pressure tank.

As far as my theory goes.

Greetings
Alex

If you accidentally pour too much oil into the engine, the excess oil will be 'eliminated' through the crankcase ventilation.
I wouldn't worry about that - but just to be on the safe side, check the oil level more regularly.

Have you had a cleaning spree again?
Or do you prefer to cycle?

So

I successfully emptied the {WAstegate} by connecting a 60 ml syringe and pumping vigorously. Whenever there was a drop in pressure, oil would shoot into the syringe.

The oil has a long journey ahead of it:

A TurboDruckStutzen is a diverter that is typically connected directly (10cm hose) to the wastegate (Yes, it is controlled by overpressure).

However, the TDI wants to tinker with everything electrically, so there is the N75 (control valve to the turbocharger control unit) - which sits next to the diesel filter on the Golf 3.

There is a red hose running from the pressure fitting to the N75, and a blue one running to the wastegate - totaling probably over 1 meter of hose.

Since the N75 switches from red to blue without power, I've blown it - everything is empty.

Well, let's check after 170,000 km to see if there's still enough oil.

m;