Regardin the 4,4TDV8 maintanace. Where is the crankcase vent filter (oil breathing filter, oil separator) located? I can only refer to the Volvo Penta D6 marine engine, were this is a serious important maintanance filter:) Would appreaciate comments to this, can not find were this is located . . . Thanks😊

The engine doesn't have a filter. A separator is located in the block under the EGR cooler which is under the oil cooler.
Google LR022761.

Thanks!!!! Now I can hope for a video that walks us through the job😅😅

It’s not a service / maintenance job. Why do you want to do this? 2012 TDV8 Vogue (L322)

as mentioned in my first post, I compare with Volvo Penta's marine engine D6, where the crankcase filter is an important part of maintenance. I assumed that TDV8 also had this. why I am looking for solution is that I have periodic oil leakage and it comes from this area. I have replaced the two o-rings at the back of the engine. but it continues to leak😢

The leak is almost certainly from the oil cooler seal - it's such a common fail item it should be a service item. 2012 TDV8 Vogue (L322)

Hopefully the new gasket part numbers indicates that the gasket material has been improved.

Many thanks for answers! But does this mean there are more O-rings to replace in this area? I did replace the two on the one tube between firewall and oilfilter (behind oilfilter).

You need to remove the oil cooler from the top of the engine to replace the main seal. Plenty of how-to’s on this if you use the search function. 2012 TDV8 Vogue (L322)

Thank you very much👍🇳🇴😊