WTB: Weistec Oil Separator
11-27-2015, 04:51 PM
#1
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WTB: Weistec Oil Separator
Anybody maybe bought one and has it still lying around? I can help you put it to good use.... 
12-03-2015, 11:05 AM
#5
Super Member
They actually did a GB for this item a little over a year ago. I think it coincided with the launch of it. I got one. Beautiful piece and very well engineered. I ended up selling it to another member on here.
12-03-2015, 03:24 PM
#6
Super Member
Yeah they have done it before but I don't think they are interested in doing another one.
They might be busy doing other major development projects. But who knows, maybe if they see an interest thread... they may change their mind.
They might be busy doing other major development projects. But who knows, maybe if they see an interest thread... they may change their mind.
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12-03-2015, 09:13 PM
#8
Super Member
Damn... I wish they remembered their days when they were working Mustangs and werent who they are today. Extending a group buy to us would get quite a few units sold and some new customers. Sigh...
12-04-2015, 08:37 AM
#10
Nope... That's why I haven't pulled the trigger. Hard to justify $600 for an oil catch can... One could probably fabricate something similar, but I still don't know why others haven't attempted to make one. Even at half the price, there should still be reasonable margins for this type of part.
12-04-2015, 10:30 AM
#11
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2012 C63 AMG
Catch can needed?
Does anyone have any evidence that we actually NEED an oil catch can on our cars? Thinking this might just be engine-bay bling? Everything I have read says that catch cans are much more useful in forced-induction engines where more oil may be forced into the PCV system due to high crankcase pressures. Am I wrong?
12-04-2015, 01:24 PM
#12
Does anyone have any evidence that we actually NEED an oil catch can on our cars? Thinking this might just be engine-bay bling? Everything I have read says that catch cans are much more useful in forced-induction engines where more oil may be forced into the PCV system due to high crankcase pressures. Am I wrong?
12-04-2015, 01:32 PM
#13
Super Member
This is true. I have seen my intake manifold off the car and there was quite a bit of oil in there.
Sort of like the Weistec Pulleys. Do you need them? No but I have heard of a few MB OEM pulleys breaking due to being plastic. Some people want peace of mind.
12-04-2015, 02:30 PM
#15
Super Member
Great idea.
I wish there was one out in the market that has the look of OEM. No fancy -AN fittings, etc. Just a catch can, baffle tray some fittings and some rubber hose.
No sense of having a stock M156 with bolt ons and the only -AN fittings in the car being the oil catch can...
I wish there was one out in the market that has the look of OEM. No fancy -AN fittings, etc. Just a catch can, baffle tray some fittings and some rubber hose.
No sense of having a stock M156 with bolt ons and the only -AN fittings in the car being the oil catch can...
12-04-2015, 05:41 PM
#16
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2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Yes, it's true that you can use any catch can, they all do the same thing.
Try these:
https://www.goapr.com/products/catch_can_mqb_ea888.html
http://www.mishimoto.com/bmw-n54-baf...an-kit-07.html
https://www.radiumauto.com/Catch-Can...esM3-P298.aspx
http://www.burgertuning.com/BMW_335_oil_catch_can.html
http://www.turnermotorsport.com/p-19...-e60-535i.aspx
http://www.uspmotorsports.com/Engine/PCV-and-Catchcans/
HOWEVER, it's not the can, but these little fittings which replace the PCV valve that make the Weistec kit so expensive.
Solve for those fittings, and any catch can will do...
Try these:
https://www.goapr.com/products/catch_can_mqb_ea888.html
http://www.mishimoto.com/bmw-n54-baf...an-kit-07.html
https://www.radiumauto.com/Catch-Can...esM3-P298.aspx
http://www.burgertuning.com/BMW_335_oil_catch_can.html
http://www.turnermotorsport.com/p-19...-e60-535i.aspx
http://www.uspmotorsports.com/Engine/PCV-and-Catchcans/
HOWEVER, it's not the can, but these little fittings which replace the PCV valve that make the Weistec kit so expensive.
Solve for those fittings, and any catch can will do...
12-05-2015, 02:48 AM
#17
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W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
I am told by my AMG tech (corporate MB dealership shop foreman) that all of the M156 engines he has seen "suffering" from oil buildup in the intake were on cars that were never run hard. Apparently a tank of half-decent gas and half a day at the track will perfectly clean it up from the six months of grandma-mode winter driving.
Even if you never track the car, once the oil fully warms up bring up the revs to 5K+ a few times now and then, and you'll burn it all off and blow it out the tailpipes. The old CLS, E and S63s with the M156 used to suffer from it a lot more because their drivers generally never took them past 2500 rpm, unlike us C63 "hooligans".
There's certainly no harm in having a catch can, but it's apparently far from essential if you properly exercise the motor now and then.
Even if you never track the car, once the oil fully warms up bring up the revs to 5K+ a few times now and then, and you'll burn it all off and blow it out the tailpipes. The old CLS, E and S63s with the M156 used to suffer from it a lot more because their drivers generally never took them past 2500 rpm, unlike us C63 "hooligans".
There's certainly no harm in having a catch can, but it's apparently far from essential if you properly exercise the motor now and then.
12-05-2015, 09:58 AM
#18
I am told by my AMG tech (corporate MB dealership shop foreman) that all of the M156 engines he has seen "suffering" from oil buildup in the intake were on cars that were never run hard. Apparently a tank of half-decent gas and half a day at the track will perfectly clean it up from the six months of grandma-mode winter driving.
Even if you never track the car, once the oil fully warms up bring up the revs to 5K+ a few times now and then, and you'll burn it all off and blow it out the tailpipes. The old CLS, E and S63s with the M156 used to suffer from it a lot more because their drivers generally never took them past 2500 rpm, unlike us C63 "hooligans".
There's certainly no harm in having a catch can, but it's apparently far from essential if you properly exercise the motor now and then.
Even if you never track the car, once the oil fully warms up bring up the revs to 5K+ a few times now and then, and you'll burn it all off and blow it out the tailpipes. The old CLS, E and S63s with the M156 used to suffer from it a lot more because their drivers generally never took them past 2500 rpm, unlike us C63 "hooligans".
There's certainly no harm in having a catch can, but it's apparently far from essential if you properly exercise the motor now and then.
12-06-2015, 03:57 AM
#19
Member
I installed Weistec Oil Separator on my C63 507. I want to say Oil Separator it's a good mod! 
That's how much oil he collected after 1200 km...
That's how much oil he collected after 1200 km...
Last edited by Alex-r-1; 12-06-2015 at 04:00 AM.
12-06-2015, 04:27 AM
#20
Junior Member
I am told by my AMG tech (corporate MB dealership shop foreman) that all of the M156 engines he has seen "suffering" from oil buildup in the intake were on cars that were never run hard. Apparently a tank of half-decent gas and half a day at the track will perfectly clean it up from the six months of grandma-mode winter driving.
Even if you never track the car, once the oil fully warms up bring up the revs to 5K+ a few times now and then, and you'll burn it all off and blow it out the tailpipes. The old CLS, E and S63s with the M156 used to suffer from it a lot more because their drivers generally never took them past 2500 rpm, unlike us C63 "hooligans".
There's certainly no harm in having a catch can, but it's apparently far from essential if you properly exercise the motor now and then.
Even if you never track the car, once the oil fully warms up bring up the revs to 5K+ a few times now and then, and you'll burn it all off and blow it out the tailpipes. The old CLS, E and S63s with the M156 used to suffer from it a lot more because their drivers generally never took them past 2500 rpm, unlike us C63 "hooligans".
There's certainly no harm in having a catch can, but it's apparently far from essential if you properly exercise the motor now and then.
The reason you want an oil air separator is to make sure that when you do drive the car hard, there is no oil buildup there to be drawn into the engine from the intake manifold.
12-06-2015, 06:33 PM
#21
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W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
Gents - as HYPERTUNE stated above, driving the car hard will in fact cause the oil to go through the combustion chamber and burn up. What his statement fails to address though is that you're going to easily get twenty times more oil into the combustion chamber as a result of it getting past the valves and piston rings than you would through the PCV (even with a very healthy engine, you'll still go through a liter of oil during a full trackday - so maybe 300 km). Compare that to the ~50cc of oil in the pic that have accumulated in Alex-r-1's catch can over 1200 km, and I think you can draw your own conclusions about the usefulness of air/oil separator when the car is often driven under WOT and high RPMs. In other words, with the catch can you may reduce the amount of oil entering the combuston chamber by, say, 1/20th AT BEST.
Cornerjunkie - this was stated by someone who has serviced hundreds of M156 engines and is a racer himself, so I have absolutely no reason to doubt his statement. He is certianly mod-friendly, but oil vapours getting through the PCV was nowhere near the top of the list of things to "address and/or watch out for" when tracking a M156 engined car. The first thing he said to me before I ventured out for my first track session in the C63 was "don't top up the oil past the halfway mark on the dipstick - it will foam up too much". The second was "I will gladly install the catch can for you right now if you want (I had it with me at the track), but it won't make one iota of a difference". Seeing as MB corporate sent him out in a support capacity for myself and another gent that had the 44O enhanced cooling packages installed and our clutch bite / shift point adaptations redone (which he tweaked trackside), I have no reason whatsoever to doubt his statement.
Cornerjunkie - this was stated by someone who has serviced hundreds of M156 engines and is a racer himself, so I have absolutely no reason to doubt his statement. He is certianly mod-friendly, but oil vapours getting through the PCV was nowhere near the top of the list of things to "address and/or watch out for" when tracking a M156 engined car. The first thing he said to me before I ventured out for my first track session in the C63 was "don't top up the oil past the halfway mark on the dipstick - it will foam up too much". The second was "I will gladly install the catch can for you right now if you want (I had it with me at the track), but it won't make one iota of a difference". Seeing as MB corporate sent him out in a support capacity for myself and another gent that had the 44O enhanced cooling packages installed and our clutch bite / shift point adaptations redone (which he tweaked trackside), I have no reason whatsoever to doubt his statement.
12-06-2015, 08:41 PM
#22
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12-06-2015, 11:30 PM
#23
I had my blower off and have been running the separator since it was installed, there was no oil in the intake.
When I took the stock intake off, oil residue all over it. Think there was a small puddle of oil on the ground after it sat there for a bit.
When I took the stock intake off, oil residue all over it. Think there was a small puddle of oil on the ground after it sat there for a bit.
12-07-2015, 12:19 PM
#24
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W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
Jasonoff & Merc63 - I am talking about the Weistec - or any other - OAS as it relates to oil consumption and possible build-up during hard (track) use. In daily street driving, it is definitely a useful add-on.
Merc63 - I would be curious to know how much oil residue you'd get after the S/C installation but without the catch can. Seeing as you're running forced induction, I'm willing to bet your intake would be bone dry even without it because of the S/C. As I said, you take a M156 motor WITH some oil residue on the intake, you run it hard for a while, and when you take the intake off again the oil residue is gone as it has all been sucked in through the combustion chamber. While you're running the engine hard though, the amount of oil that gets in your combustion chamber through the PCV is negligible compared to the amount of oil that gets there through other ways, so for cars that are regularly driven hard, it makes very little (if any) difference. For vehicles that are driven on the street (at low engine speeds) all of their life, it makes considerably more sense to get one.
Merc63 - I would be curious to know how much oil residue you'd get after the S/C installation but without the catch can. Seeing as you're running forced induction, I'm willing to bet your intake would be bone dry even without it because of the S/C. As I said, you take a M156 motor WITH some oil residue on the intake, you run it hard for a while, and when you take the intake off again the oil residue is gone as it has all been sucked in through the combustion chamber. While you're running the engine hard though, the amount of oil that gets in your combustion chamber through the PCV is negligible compared to the amount of oil that gets there through other ways, so for cars that are regularly driven hard, it makes very little (if any) difference. For vehicles that are driven on the street (at low engine speeds) all of their life, it makes considerably more sense to get one.
12-07-2015, 02:29 PM
#25
Gents - as HYPERTUNE stated above, driving the car hard will in fact cause the oil to go through the combustion chamber and burn up. What his statement fails to address though is that you're going to easily get twenty times more oil into the combustion chamber as a result of it getting past the valves and piston rings than you would through the PCV (even with a very healthy engine, you'll still go through a liter of oil during a full trackday - so maybe 300 km). Compare that to the ~50cc of oil in the pic that have accumulated in Alex-r-1's catch can over 1200 km, and I think you can draw your own conclusions about the usefulness of air/oil separator when the car is often driven under WOT and high RPMs. In other words, with the catch can you may reduce the amount of oil entering the combuston chamber by, say, 1/20th AT BEST.
Cornerjunkie - this was stated by someone who has serviced hundreds of M156 engines and is a racer himself, so I have absolutely no reason to doubt his statement. He is certianly mod-friendly, but oil vapours getting through the PCV was nowhere near the top of the list of things to "address and/or watch out for" when tracking a M156 engined car. The first thing he said to me before I ventured out for my first track session in the C63 was "don't top up the oil past the halfway mark on the dipstick - it will foam up too much". The second was "I will gladly install the catch can for you right now if you want (I had it with me at the track), but it won't make one iota of a difference". Seeing as MB corporate sent him out in a support capacity for myself and another gent that had the 44O enhanced cooling packages installed and our clutch bite / shift point adaptations redone (which he tweaked trackside), I have no reason whatsoever to doubt his statement.
Cornerjunkie - this was stated by someone who has serviced hundreds of M156 engines and is a racer himself, so I have absolutely no reason to doubt his statement. He is certianly mod-friendly, but oil vapours getting through the PCV was nowhere near the top of the list of things to "address and/or watch out for" when tracking a M156 engined car. The first thing he said to me before I ventured out for my first track session in the C63 was "don't top up the oil past the halfway mark on the dipstick - it will foam up too much". The second was "I will gladly install the catch can for you right now if you want (I had it with me at the track), but it won't make one iota of a difference". Seeing as MB corporate sent him out in a support capacity for myself and another gent that had the 44O enhanced cooling packages installed and our clutch bite / shift point adaptations redone (which he tweaked trackside), I have no reason whatsoever to doubt his statement.
