Engine oil in intake??? - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 11-17-2008, 08:02 PM
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Engine oil in intake???

Hey guys,

Pulling the engine and trans out of my E30 today to do some maintenance/cleaning. While dissembling the various intake pieces, I found engine oil in them. Quite a bit in the actual cast intake behind the throttle body. The car has been running excellent and just turned 104K. I would have never known of this. Any ideas what could be causing this? Is there a PCV valve, or is my motor toast?

Thanks!!!!!
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#2 (permalink) Old 11-18-2008, 09:46 AM
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Yes there is a PCV valve, thats what it would be.

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#3 (permalink) Old 11-18-2008, 12:17 PM
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i had the same problem with my e21. i pulled the air box off to do some cleaning and there was a puddle in my intake so i just wiped it out i have no idea how it got there but as far as i kno it hasnt come back. i think it might have been that the intake to airbox hose wasnt properly connected and an exterior leak had dripped in, thats my only explanation

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#4 (permalink) Old 11-18-2008, 07:29 PM
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Its hard to say if it was just a design oversight or not but every m20 motor I've ever taken apart had that problem. That includes 1 eta m20b27 motor and 2 m20b25's out of various 325i's.

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#5 (permalink) Old 12-04-2008, 06:32 PM
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It seams these engines DO NOT have a PCV valve in them. At least according to what I'm finding out while trying to order one. Is Blow-By the only thing that causes this to happen? I don't want to have to keep adding oil, or worry about losing it.
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#6 (permalink) Old 12-05-2008, 09:20 AM
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Sorry......................thinking of E39!!!

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