PeachParts Mercedes-Benz Forum - View Single Post - W123 617.952 Non-CA Air Cleaner Oil Separator Sealing DIY

JHZR2 · #3 03-12-2011, 10:30 PM

I was too. I think it is really to just have enough surface and volume to slow down the typical blowby airflow rate to allow the mist of oil to slow down, combine and just gravity settle down the drain. I guess the airflow going through maybe helps provide a bit of positive pressure that combined with the gravity-force of oil in the tube, lets it drain past the check valve.

I was thinking if I should stuff something like steel wool in either the tube, separator, etc., but I wouldnt want it to saturate and cause air pressure buildup... I dont know enough about the design of oil mist separators to stuff it properly.

I figure removal even with the RTV in there would be easy enough if there is a better option...

The sealing really just prevents excess blowby air from escaping out the cap and instead flow as it was intended. The vapor will hopefully more easily combine, the air will go the direction it was intended (into the U-tube) and the combined mist (now more of a liquid) will just gravity drain down the tube to the oil pan.