When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Bumping up this thread for any updates. I hear a lot of stories about intake flap issues due to PCV system failure and am contemplating a refresh of the PCV system on my M272 2008 port injection engine. However a oil catch can install is also very easy. What is the experience of guys who have done this to their cars>
I will be installing an air/oil separator catch can in my 09 E63. The PCV is not robust enough on these engines with the high crankcase pressure. I get oil in my intake manifold which can eventually make its way to a combustion chamber. Also, the oil in the IM can help cause corrosion to the magnesium M156 intake manifold housing. Heat, fuel, oil on magnesium is no bueno. Need a rear main seal as well....
I will be installing an air/oil separator catch can in my 09 E63. The PCV is not robust enough on these engines with the high crankcase pressure. I get oil in my intake manifold which can eventually make its way to a combustion chamber. Also, the oil in the IM can help cause corrosion to the magnesium M156 intake manifold housing. Heat, fuel, oil on magnesium is no bueno. Need a rear main seal as well....
I have a few parts on order. I will also be looking for a catch can setup to add to my list.
I have an upcoming oil change. I am also considering adding a intake cleanup with one of these spray aerosols as part of regular maintenance, maybe every oil change.
I have a 2007 E63 and when I took off the Intake after purchasing to address a high idle, it was pooled with Oil, so Yes, a Catch Can is a very good idea! I originally read one thread on this forum years ago that a Low’s or HD Air Compressor “filter” was a “good idea” for a catch can, but I can confirm that they suck! I had to re-clean my Intake after trying that option! I instead avoided the high priced options out there for Mercedes and went to a place that sold aftermarket stuff for Dodge Chargers (UPD near Lake Worth, Fl.) and picked up the smallest one they had for about $100 and it was very well built. Have had no problems since! I’m glad I took the time when the Intake was off to run the Hoses from the Crank around the engine to the back of the passenger Headlight by in front of the ABS. See pics below! Be careful not to cut through the rubber seal rings that are vacuum sealed underneath the OEM PCV Valve Hose! These are the ends of the OEM PCV Valve attached to the Heater Hose as found in HD. I used Oetiker Clamps in most areas except where I would need to disconnect things in the future. The routing at the back of the engine is tricky, but worth the effort!
It wouldn't hurt but they were developed for direct injection engines because there is no atomized fuel to clean the fuel from the back of the intake valve. If you have port FI, then it technically is not needed. With direct injected engines, the oil from the PCV system collects on the back of the intake valve, cokes in the high heat and creates hot spots leading to premature ignition of the intake charge. This can be baaad for engines.
01-23-2023, 09:08 AM
