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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > N52 PCV system



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      09-09-2014, 06:31 AM   #1
lvb125
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N52 PCV system

I d like to sort out my oil consumption with my N52. I am wondering about PCV valve. What is the way to diagnose it? There seems quite a lot of PCV talk with N54 engines but not with N52s. Thanks!
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      09-09-2014, 06:48 AM   #2
lvb125
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It is worth mentioning that mine is an 06 with serviceable oil/air seperator and I d like to know what it takes to have this PCV system overhauled.
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      09-10-2014, 12:50 PM   #3
Tim603
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Ive been wondering about this as well, its a very common maintenance item on alot of other cars but dont really hear much about it on N52. Maybe its something that we dont need to worry about?
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      09-10-2014, 01:03 PM   #4
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Quote:
Originally Posted by lvb125 View Post
I d like to sort out my oil consumption with my N52. I am wondering about PCV valve. What is the way to diagnose it? There seems quite a lot of PCV talk with N54 engines but not with N52s. Thanks!
Do you have any leaks? Mine has a bad leak and still takes about about to 10 months before I need to add oil. By this time its time for an oil change anyways so I just change the oil.
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      09-11-2014, 04:21 AM   #5
lvb125
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Originally Posted by GoRomeo View Post
Do you have any leaks? Mine has a bad leak and still takes about about to 10 months before I need to add oil. By this time its time for an oil change anyways so I just change the oil.
Only visible VCG leak and VT gasket leak. The car had only done 5500km (3500 miles) since the last service at dealer and the digital dipstick is at the last 1/4 notch for a while now, probably will ask me to top up very soon. Looks like it is losing more oil than those leaks.
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