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Old 06-05-2019, 10:42 AM
stiubhartach stiubhartach is offline
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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:


https://www.meeknet.co.uk/e31/BMW_M6...entilation.htm


Underside of the valve cover:


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



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