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N52 PCV system
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03-25-2018, 11:51 AM | #23 | |
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But nothing changed, changing oil from 5w30 to 5w40 does not reduce the oil consumption. So I would think it's not seals or rings. No smoke on startup but constant white-grey looking smoke out of exhaust. I think my best bet would be replacing every hose and ccv again and hope it fixes it, not sure if I'm in the mood to remove intake manifold couple times.. |
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03-25-2018, 02:09 PM | #24 |
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Your location says you are in Europe. Do you have N52B25 (real 2.5 litre N52) or N52B30 ? (3.0 litre one)
The former N52B25, which was not released in US, is known to have oil consumption problems due to piston rings and valve stems: http://mywikimotors.com/n52b25/#Problems "1. The most common problem in N52B25 is high level of motor oil consumption. This is due to thin oil rings which are carbonized rather fast. At the same time valve stem seals goes out of order rather often. Such problems may occur even after 100,000 km (~60 000 miles) of mileage. The only solution to this problem is replacement of damaged components. New N52NB25 version did not have such problems. It was firstly introduced in 2007 and has black cap." |
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03-25-2018, 02:17 PM | #25 | |
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I guess I can get compression kit to see if rings are fine, don't know how to check for valve seals, but heard that a lot of blue smokes comes out on cold start and that does not happen. It's constant white-grey smoke. (Can see it from my mirrors) Mostly while idling at lights. And why a lot of oil in intake manifold? seals and rings are not related to that right? Only ccv OH and also after getting the ccv replaced, I went to a mechanic to get oil changed, was not allowed to look when it was performed and the car was running rough after 2a82 and 2a9a faults. So a week or so passed and apparently they adjusted timing... Car ran fine like before, but oil consumption was the same... So I was lost and stalled the repairs... Just a blind guess could bad vanos solenoid cause some vacuum issues? Or anything else to cause the new ccv diaphragm to fail? Last edited by andas; 03-25-2018 at 02:32 PM.. |
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03-25-2018, 04:01 PM | #26 |
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I don't have experience with valve stem seals or piston rings leaking, so can't help you there.
I own my car since 2006 new, and the only time I got a vanos selonoid code was I used a different brand oil than what I used to put in the car, the last oil change made. Within a day or two it threw one of those vanos codes. Then it went away and didn't come back, four months now. I interpreted it to the different brand oil dislodged some sludge in the engine and caused the solenoid to get dirty but cleared itself as engine worked. You may have same have happened. My vanos selenoids are the original ones, supposedly need to be replaced with the age and mileage I have, but I am not replacing them unless I have to (getting persistent codes related to them). Summary, don't think vanos is related to your oil consumption. |
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09-01-2018, 06:25 AM | #27 |
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PhaseP i'm in the process of changing my pcv on my n52b25 e60 525i. googled this topic and found your posts in this thread and others very helpful. because i can't find a video on how to do this on an exactly same car as mine anywhere. there're some videos covering M54 engines but not N52. so thanks a lot. i just removed the intake manifold and waiting on the parts to arrive. i can see a lot of "mayo" in the oil lines in and out of the oil separator. hope everything goes OK.
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10-04-2018, 03:51 PM | #28 | |
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328i Sports Pkg, Michelin PSS on Staggered 18" OZ Ultraleggeras
. BMS Powerbox. Cyba scoops + Rev motoring intake hose + charcoal delete. Wavetrac LSD . M3: subframe bushings + sways + control arms (fr & rr). Meyle rear toe arms. M3 diff fr bushings . BMW Perf: v2 springs + v1 dampers. Valeo SMFW+clutch. 034 MotorSport engine mounts . Short Shifter + Turner PU bearing + ZHP M weighted shift knob. CDV delete |
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10-06-2018, 01:43 PM | #29 |
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No, that is the valve cover to intake manifold breather hose on plastic valve cover N52s, which all 328 US models are. That one doesn't have a check valve.
The return hose I was mentioning is found on the 2006 N52's, with silver engine vanity cover and magnesium valve cover (not plastic). |
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10-07-2018, 12:31 PM | #30 |
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so plastic vlv cover design do not have the check vlv hose anymore ? Mine's a 10/2006 build FWIW
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328i Sports Pkg, Michelin PSS on Staggered 18" OZ Ultraleggeras
. BMS Powerbox. Cyba scoops + Rev motoring intake hose + charcoal delete. Wavetrac LSD . M3: subframe bushings + sways + control arms (fr & rr). Meyle rear toe arms. M3 diff fr bushings . BMW Perf: v2 springs + v1 dampers. Valeo SMFW+clutch. 034 MotorSport engine mounts . Short Shifter + Turner PU bearing + ZHP M weighted shift knob. CDV delete Last edited by DaanBMW; 10-23-2018 at 11:04 PM.. Reason: big typo |
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10-23-2018, 11:05 PM | #31 |
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Just saw the ridiculous typo I had for the manufacturing date.
Q remains: for my engine do I still have such a hose with a check valve ?
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328i Sports Pkg, Michelin PSS on Staggered 18" OZ Ultraleggeras
. BMS Powerbox. Cyba scoops + Rev motoring intake hose + charcoal delete. Wavetrac LSD . M3: subframe bushings + sways + control arms (fr & rr). Meyle rear toe arms. M3 diff fr bushings . BMW Perf: v2 springs + v1 dampers. Valeo SMFW+clutch. 034 MotorSport engine mounts . Short Shifter + Turner PU bearing + ZHP M weighted shift knob. CDV delete |
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05-29-2020, 10:59 AM | #32 |
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Im missing this hose.. My car is running really rough.. I had a "BMW Tech" change my valve cover gasket.. I should have did it myself.. but man.. half ass work.. -Missing Hardware -Hoses not in clamps -Cable that runs under the valance hung up somewhere, super tight -Hose missing on CCV After the gasket change, my cars running super rough. I've swapped out: All Spark Plugs NGK ALL Coils BOSCH Camshaft Solenoids Both Bremi O2 Sensors BOSCH Next is the Vanos Solenoids.. Sooooo.. My question is, where is the other end to that nipple go? Sorry.. just venting.. but photos or diagram would be greatly appreciated. |
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05-29-2020, 04:24 PM | #33 |
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if you have 2009 328i, and if you indeed have that nipple at the intake pipe that is open (not molded close), then you must have an N51 engine (SULEV). For those there is a hose and the other end should go to the nipple that comes off of the crank case ventilation valve which is integrated into the valve cover. There will most probably a cap on that nipple at valve cover side, pull the cap off if it is there. It is loosely attached, it is a dust dirt cover, doesn't seal.
Number 26 here: https://www.realoem.com/bmw/enUS/sho...diagId=11_3737 In the mean time, you can try to block the air passage on that nipple at the intake side, maybe with a tape or something, and see if it fixes your rough running engine. It should be fine blocked. None SULEV (N52) 328's have it like that, that nipple is molded close. On |
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