Audi A3 8P 1.9 TDI BLS: Parts & Info

Perhaps someone here can help me.
Habe vor 2 Tagen einen Audi A3 8p mit 1,9 Tdi BLS 77kW gekauft. Year of construction: 2007.
101,000 km.
The engine was running unevenly at the time of purchase.
After reading the error codes with VCDS, I thought the wiring harness for the pump injector was defective.
The previous owner was told that the head gasket is faulty.
Water reservoir is completely verschandeln and full. Oil cap is tight, and there's no smoke coming from the exhaust. During the ride home, the water temperature remained consistently at 90 degrees.
On the way home, the car stopped on the highway after a brief beep and the oil warning light started flashing, as if someone had turned the ignition key back. I immediately pulled over to the right shoulder and pushed the rest of the way. From that point on, both fans were running with the ignition off.
Today I obtained and installed the injector wiring harness.
Beim Abnehmen des Ventildeckels war alles recht versifft. See image.
The car has been regularly serviced at a Volkswagen dealership.
What do you think it could be?
I've now drained the oil and will remove the oil pan tomorrow to see if there's any debris inside it.
What's the best way to flush out the engine?
Thank you very much!

maxm3 wrote:

I bought an Audi A3 8p with a 1.9 TDI BLS engine (77 kW) two days ago.

My condolences!

I would consider the engine to be essentially scrap metal; there's probably a lot wrong with it. It was likely operated for an extended period with excessive water in the oil. After the warning light came on, was there still enough oil in it?

maxm3 wrote:

The car has been regularly serviced at a Volkswagen dealership.

Hard to believe.

He's completely ruined. He probably used the wrong type of oil and also experimented with additives.

Both water and oil were at their maximum levels.
Tomorrow I'm going to remove the oil pan and take a look at the breather tube on the oil pump.
If it's dirty, I will verschandeln it and then run it with fresh oil and a cleaning additive. If the oil pressure light comes on again, I will look into getting a replacement engine.

I would directly remove a connecting rod bearing cap; presumably, the situation will then be clear.

Quote:

I would directly remove a connecting rod bearing cap; presumably, the situation will then be clear.

Connecting rod bearing damage is very common in the BLS engine. Based on how it looks, I would be surprised if the connecting rod bearings were still in good condition.