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Old 06-05-2019, 10:14 AM
Emory39's Avatar
Join Date: Nov 2014
Location: Boise ID
Posts: 618
Emory39 is on a distinguished road
So I went over that thread, and what i got from it is that I might need to remove the valve covers to better clean the ccv "cyclone separators" on the underside of the valve cover. And replace the ccv valves again beacuse I noticed that the inner seal have a small piece of it mising.

Will that be the best way to follow the diagnosis?
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Old 06-05-2019, 10:42 AM
Join Date: Apr 2015
Location: Sacramento
Posts: 140
stiubhartach is on a distinguished road
The 'cyclone' oil separator is in the M62 engine. Your N62 engine has a simple valve built into the head. There's no cyclone underneath.

The correct way to clean the valve is to remove the valve cover. I was lazy and cleaned mine by blowing carb cleaner down the hole and into the engine. Then I immediately changed the oil. This is NOT the correct way.

Here's more info with a good explanation of failures:


Underside of the valve cover:

2005 X5 4.4i SterlingGrau, Sport Package, DSP
Build 3/12/2005

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Old 03-22-2020, 10:35 AM
Join Date: Mar 2014
Location: KY
Posts: 320
14thbmw is on a distinguished road
So the parts for replacing the valves are now around $80 on ECS but a pair of aftermarket (new) on Amazon is $13.86. Anything wrong with the Amazon (Dade) item - it has good reviews?

Dade Set of 2 Crankcase Vent Valve PCV Pressure Regulating Valve Fit for BMW 11127547058 14506018001 https://www.amazon.com/dp/B01H027CUQ..._4D3DEbZ0RF4X9

2005 e53 X5 4.8is 160k miles
2018 M5
2018 Volvo XC60
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ccv, ccv oil separator, smoking

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