Engine breathing

[harvey121]

Got a class 816 and the engine breathes a lot. It's a JD engine done 7000 hours but doesn't use oil is his normal ? Or should I be concerned?

 

[Grouse]

Well if it’s not using oil, but it’s breathing then it’s diesel exhaust fumes that are exiting and not burnt oil - I can’t see it being the rings otherwise it would be using oil - valves perhaps ?

and to answer the question all engines breath to some extent - it’s physically impossible for an engine to have totally gas tight rings - we have a New Holland here which breathes as well but the engine is fine with loads of power - had her in the Dyno

 

[startinghandle]

I used to have JD2040 which also breathed and used no oil but it breathed more if it went overdue for oil change