Weistec Engineering Oil/Air Separator Group Buy 2014
08-19-2014, 09:49 AM
#226
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
Driving aggressively and going WOT a lot also heats the oil up quickly and can cause some to evaporate into the gasses in the sump. That and increased blow-by causing pressure to build in the sump, as glennhl mentioned, are probably the main reasons for oil being sucked into the PCV system. Then when you lift and close the throttle body that oil charged crankcase air is sucked into the intake manifold by high vacuum created in the intake manifold.
The filter media in the AOS will be relatively cool compared to the temperature of the sump air and will cause the oil and water particles to condense on the filaments. From there it will drip into the base for storage and later removal to be disposed. The AOS will not remove all the oil/water particles in sump gases but will remove a large percentage of them and keep your intake manifold and runners much cleaner and lessen the chance of detonation at WOT as well.
The filter media in the AOS will be relatively cool compared to the temperature of the sump air and will cause the oil and water particles to condense on the filaments. From there it will drip into the base for storage and later removal to be disposed. The AOS will not remove all the oil/water particles in sump gases but will remove a large percentage of them and keep your intake manifold and runners much cleaner and lessen the chance of detonation at WOT as well.
08-19-2014, 01:40 PM
#227
Super Member
Driving aggressively and going WOT a lot also heats the oil up quickly and can cause some to evaporate into the gasses in the sump. That and increased blow-by causing pressure to build in the sump, as glennhl mentioned, are probably the main reasons for oil being sucked into the PCV system. Then when you lift and close the throttle body that oil charged crankcase air is sucked into the intake manifold by high vacuum created in the intake manifold.
The filter media in the AOS will be relatively cool compared to the temperature of the sump air and will cause the oil and water particles to condense on the filaments. From there it will drip into the base for storage and later removal to be disposed. The AOS will not remove all the oil/water particles in sump gases but will remove a large percentage of them and keep your intake manifold and runners much cleaner and lessen the chance of detonation at WOT as well.
The filter media in the AOS will be relatively cool compared to the temperature of the sump air and will cause the oil and water particles to condense on the filaments. From there it will drip into the base for storage and later removal to be disposed. The AOS will not remove all the oil/water particles in sump gases but will remove a large percentage of them and keep your intake manifold and runners much cleaner and lessen the chance of detonation at WOT as well.
08-19-2014, 05:09 PM
#229
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08-19-2014, 05:25 PM
#230
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C63 Estate
Your telling me! Sorry to wee wee on the bondfire, doesn't even have braided lines though! Doesn't really need them but at that monies should be gold plated with lines made of unicorns horns 
08-19-2014, 08:42 PM
#233
Super Member
Excellent quality unit, however, the main thing is how you hook up the AOS to the C63's PCV system. On other cars where I've added AOS's in the past hooking it up required me to remove a hose from a barbed fitting just downstream of the throttle body. No such luck with the M156 engine. You need two special o-ring machined adapters that Weistec had to back engineer. Otherwise I would have bought a similar AOS for around $180.
08-29-2014, 06:25 AM
#234
Super Member
Just some quick FYI follow-up - finally got some oil in the can after about 2K miles. Took a while, probably for enough to build up within the system I guess? Regardless, it's finally there for anyone else who's been waiting for results.
