Oil Catch Can
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Member
Joined: May 2015
Posts: 130
Likes: 36
2012 E63 AMG PP
Oil Catch Can
Did a search but only found results for M156 motors. Does the M157 need a catch can? It is a direct injection motor, but I can't find anything on it. Where does the oil go that comes of the crank case breather valve? If it goes back into the intake manifold like most cars then does this mean our liquid to air intercooler is getting covered in oil?
Senior Member
Joined: Apr 2019
Posts: 428
Likes: 96
From: Houston
001 s600, 94 sl600
YES oil mist/vapor flowing into the charge cooler WILL oil coat the cooler interior surface. IS there a drain plug on the cooler? A BIG problem with 'direct injection' engines is deposit formation on and around the intake valves. The deposits eventually reduce the air flow through the intake valves.
Newer engines are now including small intake manifold injectors spraying on the intake valves to keep them clean. 50 years ago when LPG was first being used in farm engines, Marvel Mystery Oil developed an 'Inverse Oiler' which dripped MMO into the air intake stream fur 'upper cylinder lubrication,' to dramatically reduce wear on valve guides, piston rings and cylinder walls. The 'inverse' name was for how it increased MMO flow when engine manifold pressure dropped indicating higher engine load.
An 'oil catch can' added into the blow-by line to intake plumbing will catch a lot of the oil mist so you can periodically dump it out.
Newer engines are now including small intake manifold injectors spraying on the intake valves to keep them clean. 50 years ago when LPG was first being used in farm engines, Marvel Mystery Oil developed an 'Inverse Oiler' which dripped MMO into the air intake stream fur 'upper cylinder lubrication,' to dramatically reduce wear on valve guides, piston rings and cylinder walls. The 'inverse' name was for how it increased MMO flow when engine manifold pressure dropped indicating higher engine load.
An 'oil catch can' added into the blow-by line to intake plumbing will catch a lot of the oil mist so you can periodically dump it out.
Senior Member
Joined: Feb 2011
Posts: 320
Likes: 40
From: Northern VA
2015 CLS63 S AMG
When doing my turbopipe install, I noticed oil throughout the Turbo inlet and Intercooler inlet piping. To the point that it had pooled in the pipes and dripped out once they were removed. This is definitely an issue on the M157s.
I'd suggest two catch cans on the crank case breather couplers connected to the Turbo Inlet pipes. Have yet to get to it since I've been dealing with some transmission issues. Will be posting on this in the future though. Thank you all for bringing it back up though.
I'd suggest two catch cans on the crank case breather couplers connected to the Turbo Inlet pipes. Have yet to get to it since I've been dealing with some transmission issues. Will be posting on this in the future though. Thank you all for bringing it back up though.
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Thread Starter
Member
Joined: May 2015
Posts: 130
Likes: 36
2012 E63 AMG PP
Haven't got around to doing it but I was looking at one like this. https://www.motionraceworks.com/prod...s3-ls6-ls7-ls9
I notice there are breather valves on each crank case that run back into the intakes where the rubber couplings meetup
I notice there are breather valves on each crank case that run back into the intakes where the rubber couplings meetup
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