06-16-2020, 11:40 AM | #45 | |
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06-16-2020, 11:54 AM | #46 | ||
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06-16-2020, 05:19 PM | #47 | ||
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07-03-2020, 12:18 PM | #48 |
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After running the BMS OCC for 3~months now with some mixed city/highway/aggressive driving, for my N55 M2 the inside was bone dry. It had a slight oil smell to it but there wasn't even 1 drop accumulated in the catch can.. Honestly don't know know how I feel about it in terms of if the OCC just isn't working or the N55 got no blow by LOL. I guess it's good news?
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07-03-2020, 02:28 PM | #49 | |
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07-03-2020, 07:40 PM | #50 |
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Yea seems to be that way. I guess it is good news. My buddy has a 1M and even on his N54 his BMS OCC has always been bone dry like mine. Which surprised me TBH LOL.
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07-04-2020, 12:33 PM | #51 | |
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To my surprise, my can was dry - not even a drop of oil. My Type R has an insane amount of blow-by (1k will leave about 2 ounces in the can, easily). Secondly, my driving has been a mix of city and highway driving, with about 80% of this total consisting of city driving I am wondering if BMW made some changes to correct blow-by. |
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07-24-2020, 11:04 PM | #52 | |
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04-21-2021, 06:12 AM | #53 |
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Very informative thread.
The MMR OCC looks so dope but heard it won't be a direct fit (plus shipping to AU)... I found mishimoto has local branches and sells OCC for 335i/135i (2011-2013) which I believe is the base N55 variations, should it fit the F87 OG M2 without issues? I'd like to hear feedback from mishimoto OCCs. TIA. https://www.mishimoto.com.au/bmw-n55...2011-2013.html
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04-22-2021, 03:15 PM | #54 | |
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But if you don't see any blow by at all then it is likely your piston rings are sealed quite well and your car doesn't produce all that much blow by. That combined with the splitting effect of blow by between the head ports and the pcv valve makes it so oil catch cans don't catch anything because there is so little blow by in the first place even before splitting. This is why some N55's have super clean valves even at high mileage.
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04-23-2021, 12:11 AM | #55 | |
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Only the gap between the plastic engine cover and the engine block for the vent hose is a bit tight. Also to disconnect and reconnect the return hose from the OCC is really PITA. I dropped the screw onto the stiffening plate. But this should be a common problem for all OCC installations. |
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04-23-2021, 01:39 AM | #56 | |
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The problem is making those cans fit. IMO the best solution now would be the turner motorsports can, their reverse flow baffle is the best design not only making the air flow reverse direction really forcing that oil to drop out, but it integrates grates as well for even more oil separation. The hoses also sit in a way where water doesn't pool and freeze in the winter. The MMR can imo is not the best designed the baffling is pretty poor, iirc it is just a grate on a hole. The hose design also allows water to pool imo so not the best. So yeah make sure you not only get a can with good baffling and air flow design otherwise the oil catch can will be essentially just for show and not able to catch anything.
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04-23-2021, 11:46 AM | #57 | |
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04-23-2021, 02:49 PM | #58 |
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Yeah it'll help, I personally would only out it on the can inlet and not the outlet side so it would never get sucked into the motor.
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05-27-2021, 12:29 PM | #59 | |
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06-07-2022, 01:58 AM | #60 |
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Long term OCC updates anyone?
Reviving old thread! Can anyone comment as to their experience with long term use of OCC on either the N55 or the S55? Also if you've noticed any difference in what's in the OCC based on what engine oil it's used (ie NOACK score).
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06-07-2022, 03:43 AM | #61 | |
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In terms of blow by vs. NOACK of oil this is very hard to quantify. Generally good oils are only a few percentage points different from one another so in a low mileage oil change interval the difference might be very small and hard to quantify. But it is still absolutely worth it to run a high quality oil with a low NOACK rating to ensure that long term effects do not add up. Also these cars have head ports so some blow by does by pass the main pcv route and get sucked right into the intake tract, so results will always flucctuate. An oil catch can will still help reduce the carbon build up though, as it will catch the blow by produced via the standard pcv tract. In summary an oil catch can doesn't hurt to have, especially if your car is one of the few that makes alot of blow by or you're starting to tune and increase boost as that will generally increase blow by production.
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06-07-2022, 07:41 AM | #62 |
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2017 with about 11k miles on it and I've never had to empty the canister. I have just a few dots of oil on the canister dipstick when I check it but not even enough to accumulate.
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02-20-2024, 07:21 PM | #64 | |
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Revisited the thread before placing an order for the Turner F87 M2 OCC kit. Thanks for the comment on the other thread (oil drain plug). I'd install the Turner OCC just for peace of mind even if the N55B30T0 does not produce much blow-by and suffer from carbon deposit (Direct Injection by design problem). Fun fact: OCC on Fritz's M235i: https://www.youtube.com/shorts/z1BWR3yM7V8
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