Weistec Engineering Oil/Air Separator Group Buy 2014
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I was just about to place myself back on the list until I read your question. This is a good question. Can we get an answer to this? I assume the catch can will prohibit additional oil from entering, but any oil currently in there will remain there until it is physically removed.
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I would agree that you would want to get this as early as possible in the engines life, however there are likely two points that make adding it a good idea at any time.
First, as Weistec states, the aeresolized oil is a low octane addition to the intake gases and effectively reduces the octane rating of the intake charge. The engine's knock sensors would, I presume, retard timing and reduce power to prevent pre-detonation.
Secondly, even though there may be accumulated oil in the intake tract, that does not mean adding more can't do any further harm in the way of valve and piston deposits.
For me the real question is not "do I add this to my engine?"
It is "Why is an equivalent component not already there?"
I don't believe it is because MB doesn't care about the longevity of their engines. I suspect it is because the cost/benefit ratio of this additional component is marginal when applied to millions of units. That is, if they get 1 more year of life before a rebuild, on an engine that is designed to run say 12 years on average before requiring a rebuild (just a guess on my part), there is no significant benefit to MB as a motor company to add this component and extend the life of the engine for year or two. It is not the type of component that will prevent a catastrophic failure e.g. head bolts. It only keeps the engine cleaner over time and likely marginally improves power and emissions.
I will get one because I am compulsive about my automotive care and keeping my engine as clean as is reasonably possible sounds very good to me. Plus it's CNC gear head coolness.
First, as Weistec states, the aeresolized oil is a low octane addition to the intake gases and effectively reduces the octane rating of the intake charge. The engine's knock sensors would, I presume, retard timing and reduce power to prevent pre-detonation.
Secondly, even though there may be accumulated oil in the intake tract, that does not mean adding more can't do any further harm in the way of valve and piston deposits.
For me the real question is not "do I add this to my engine?"
It is "Why is an equivalent component not already there?"
I don't believe it is because MB doesn't care about the longevity of their engines. I suspect it is because the cost/benefit ratio of this additional component is marginal when applied to millions of units. That is, if they get 1 more year of life before a rebuild, on an engine that is designed to run say 12 years on average before requiring a rebuild (just a guess on my part), there is no significant benefit to MB as a motor company to add this component and extend the life of the engine for year or two. It is not the type of component that will prevent a catastrophic failure e.g. head bolts. It only keeps the engine cleaner over time and likely marginally improves power and emissions.
I will get one because I am compulsive about my automotive care and keeping my engine as clean as is reasonably possible sounds very good to me. Plus it's CNC gear head coolness.
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To add to that, you could always get an engine clean which in turn will clean your valves of deposits. We have a machine that will clean your valves, combustion chamber, o2 sensors etc... I usually do this to my engine every six months for just this reason. Having the catch can will further help my engine as bjonesmd has mentioned. It's good piece of mind for me
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...as for the $400 price, that is an absolute steal! I get "special' pricing from Weistec and that is lower than I paid for the catch can when they first introduced it a couple years ago so you would be a fool not to jump at this opportunity.
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Although the question seems to be answered, we will hit it one more time.
The M156/M159 engine is prone to getting oil in the intake system due to the design of the PCV system. Crankcase ventilation routing from the engine block to the intake manifold is in close proximity to the front timing chain, and this causes oil to be sucked up into the intake manifold. Although AMG took a very different (and very nice) approach to venting the crankcase, these engines do suck up quite a bit of oil, causing the intake manifold, runners, valves, etc. to be coated with oil.
From our testing, and years of examining these engines, the oil does eventually burn away and dry off if no new oil has entered the system. To answer the question, "Is the damage already done", the answer is no. Run the separator and over time you will see that 90% of the oil is not in the intake manifold.
We hope this helps. Thanks!
Weistec Engineering
The M156/M159 engine is prone to getting oil in the intake system due to the design of the PCV system. Crankcase ventilation routing from the engine block to the intake manifold is in close proximity to the front timing chain, and this causes oil to be sucked up into the intake manifold. Although AMG took a very different (and very nice) approach to venting the crankcase, these engines do suck up quite a bit of oil, causing the intake manifold, runners, valves, etc. to be coated with oil.
From our testing, and years of examining these engines, the oil does eventually burn away and dry off if no new oil has entered the system. To answer the question, "Is the damage already done", the answer is no. Run the separator and over time you will see that 90% of the oil is not in the intake manifold.
We hope this helps. Thanks!
Weistec Engineering
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Weistec
Here is a short video a customer put up on YouTube. This is a great representation of how much oil the separator will not allow to go back into the engine.
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One more...
Installation manual link below. Thank you all!
http://weistec.com/install/m156oas.pdf
Weistec Engineering
Installation manual link below. Thank you all!
http://weistec.com/install/m156oas.pdf
Weistec Engineering
