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      10-17-2012, 04:15 PM   #3
mike-y
just another bmw douche bag
 
Drives: 1.9L of fury
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cleaning isn't really needed on the N52 because it still uses port injection, and the intake ports/valves are bathed in gasoline, keeping them clean. When I did the manifold swap on my car with about 75,000 miles, the intake ports and valves were spotless.

but, if you really want to do it, feel free. it's kinda a PITA tho. removing the cover and airbox is only the tip of the iceberg for a manifold R&R.
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