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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 > Removing intake on 328xi for cleaning

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      10-17-2012, 11:56 AM   #1
Drives: 2007 E91 328XI
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Removing intake on 328xi for cleaning

Im planning to do the plugs and was thinking i shouldnt have much ahead to remove the intake such that i can clean the valve/port area.

Are there any gotchas? Just wondering if its as simply undoing the manifold bolts after removing the cover and airbox and a few electrical connectors.

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      10-17-2012, 02:06 PM   #2
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yeah, that's pretty much it... are u replacing plugs with OEM ones or something "performance" you're experimenting with?
After 58k miles i expected my throttle body port and valve to be filthy but was to my surprise it had very little debris... use rubbing alcohol and a soft towel and you should be in the game
WTB: 3 Stage Intake Manifold and components - PM me your asking price.
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      10-17-2012, 04:15 PM   #3
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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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