VW 3.0 TDI

[jmartin]

(12-05-2025 )Rawze Wrote:  

(12-04-2025 )mikkhh Wrote:  

(12-04-2025 )jmartin Wrote:  @rawze - yes it has the typical euro setup with crankcase vacuum pulled from turbo inlet thru an oil separator. I do not want the oil in there, but the problem with vent to atmosphere is when the hot engine cools down it will suck unfiltered air thru the breather tube and bring dust/dirt into the oil. Could put a breather filter on the end of the tube and that might be good enough. Also some factory separator designs require a little vacuum to open - if there is no vacuum they will build high crankcase pressure. Don't know if this one works like that. I may just go with a catch can setup and NOT set it up to drain into the sump.

All older engines do not have any crank case filtration, just a long pipe and usually steel mesh as a filter at cylinder head, the amount of dirt or unfiltered air coming down a like a meter long tube is neglible.

I agree with mikk on this one. - ALL older diesel engines vent to atmosphere. It was never an issue in the past.

In fact, that is the first thing I did to my Nissan pick up truck.. got rid of that garbage intake-gunking, turbo killing, cc fume building crap off it right away.

I have also never seen higher levels of dust, salt, anything in oil samples on my ISX.. which vents directly to atmosphere too.. winter .. summer .. etc. never any intrusion.

Your post(s) sounds like some complete bulls$it trash that people would say off social madai sites to me. It sound like someone has been drinking the coo-aide.

here is some related info: https://rawze.com/forums/showthread.php?...22#pid9322

Well I stand corrected.... I was overthinking this. Plenty of tractors and other equipment working in dusty and dirty environments with open crankcase vent tubes without issue. I will just vent to atmosphere.

I think mikkhh asked for a pic of the damper



(edited to fix image)