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smithpatrick
Joined: 05 Nov 2007 Posts: 44 Location: Southern New Jersey
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Posted: Sun Apr 19, 2009 5:48 pm Post subject: oil in my intake manifold |
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1990 325i 5 speed
I removed my my bypass valve boot,( the big rubber elbow)
Inside I found lots of oil along with seriously oil fouled plugs.I blame the serious fouling on this excess of oil in the intake. Let me say I am in no rush to take the head off.
Could this have been cause by my valve seal gaskets?
I've never seen this before, how about anyone else.[img] _________________ 5 e30's 84, 87, 3 90's
4 Boxer motorcycles R75/5, 2 R60/6, and a R90/6
1995 e36 320i auto euro specs from canada, 98 323i auto
2001 e46 325i manual
Last edited by smithpatrick on Fri May 15, 2009 8:20 pm; edited 2 times in total |
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85-325e
Joined: 30 Jun 2002 Posts: 4712 Location: Southampton, NY
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Posted: Sun Apr 19, 2009 6:31 pm Post subject: |
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Oil in that boot is common... oil fouled plugs are another issue I think... _________________ Cosmo - 1985 BMW 325e, Single Owner, 265,000+ ORIGINAL miles and still going strong! But now on the East Coast and the salt air corrosion is eating my beautiful car alive...
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whiskeybravo
Joined: 24 Jul 2007 Posts: 159 Location: Virginia
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Posted: Sun Apr 19, 2009 10:11 pm Post subject: |
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Is oil in that boot ok? I also have oil in that boot and I have also found oil in the air box... what is it all coming from? How can you fix it? I don't mean to hijack this thread but I think that the oil in this boot is affecting my MAF so I would like to know where it is coming from. _________________ 88 325iC |
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85-325e
Joined: 30 Jun 2002 Posts: 4712 Location: Southampton, NY
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Posted: Mon Apr 20, 2009 12:12 am Post subject: |
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I don't know exactly, but I know I've read it up here. It comes from the valve cover breather hose at the top back of the valve cover. _________________ Cosmo - 1985 BMW 325e, Single Owner, 265,000+ ORIGINAL miles and still going strong! But now on the East Coast and the salt air corrosion is eating my beautiful car alive...
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idanity
Joined: 21 May 2005 Posts: 3097 Location: N.W.U.S.A.
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Posted: Mon Apr 20, 2009 1:50 am Post subject: |
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its very common..
but a photo would be nice to ensure were talking about the same amount.
what i find, is a small amount of varnish, every 6months to a year. _________________ .......... |
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whiskeybravo
Joined: 24 Jul 2007 Posts: 159 Location: Virginia
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Posted: Mon Apr 20, 2009 7:24 am Post subject: |
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85-325e wrote: | I don't know exactly, but I know I've read it up here. It comes from the valve cover breather hose at the top back of the valve cover. |
I've read that as well... so I replaced that exact hose with a brand new one and I still get oil there. I guess some oil will always end up there via the hose? _________________ 88 325iC |
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jlevie
Joined: 01 Jan 2005 Posts: 553 Location: Huntsvile, AL
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Posted: Mon Apr 20, 2009 7:33 am Post subject: |
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Oil in the intake on a higher mileage M20 engine is quite common. The cause of oil being there will be worn valve seals, blowby past the rings, or a combination of those. A compression and leak down test will tell if the rings are a major contributor. _________________ NASA and BMW Certified instructor
Spec E30 #96 (NASA-SE) |
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tncean
Joined: 26 Feb 2005 Posts: 1652 Location: Chattanooga, Tn.
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Posted: Tue Apr 21, 2009 2:37 am Post subject: |
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For what it's worth, I did notice a decrease in "oil" film in the maf and air duct after a cyl head rebuild at 185k. The valve seals were redone.
t |
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smithpatrick
Joined: 05 Nov 2007 Posts: 44 Location: Southern New Jersey
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Posted: Fri May 15, 2009 7:34 pm Post subject: |
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i did find a fault with the valve cover gasket, metal spacer was interfering with the cover seating properly, took the metal spacer out. tight cover gasket no leaks.
on my other 325i when i remove the oil filer cap the engine speed decreases, not with this new old 1990 325i manual trans. it seems there is an air leak.
all new rubber, good seal on valve cover, no responce from injectors when sprayed with ether, same for intake manifold.
no smoke, and it passed inspection. i will do a compression test.[img] _________________ 5 e30's 84, 87, 3 90's
4 Boxer motorcycles R75/5, 2 R60/6, and a R90/6
1995 e36 320i auto euro specs from canada, 98 323i auto
2001 e46 325i manual |
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tncean
Joined: 26 Feb 2005 Posts: 1652 Location: Chattanooga, Tn.
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Posted: Sat May 16, 2009 12:16 am Post subject: |
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Checked the hose from the valve cover that goes to the intake, as 325e suggested? Is gasket under oil add cover good? You might even try covering add oil cover area with a plastic bag on a gloved hand (engine running... heads up... messy) to see if change in performance... there should be, I would think. Or, make a temporary gasket for it.
Tried pulling out dipstick with engine running? There's an o ring on there, as well. If it's pulled with engine running, it should change performance.
Metal spacer? What is that about?
Does sound like an air leak.
t |
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85-325e
Joined: 30 Jun 2002 Posts: 4712 Location: Southampton, NY
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Posted: Sat May 16, 2009 3:07 am Post subject: |
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t, you're so funny...
But you're right! What's that spacer thing you were talking about??? _________________ Cosmo - 1985 BMW 325e, Single Owner, 265,000+ ORIGINAL miles and still going strong! But now on the East Coast and the salt air corrosion is eating my beautiful car alive...
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smithpatrick
Joined: 05 Nov 2007 Posts: 44 Location: Southern New Jersey
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Posted: Thu Jun 04, 2009 10:41 pm Post subject: spacer thing |
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THE SPACER WAS UP FRONT NEAR THE CAM SHAFT SEALS, IN BETWEEN THE 2 ROCKER SHAFTS. iT SHOULD REST CLEANLY BETWEEN THE 2 SHAFTS IN THIS CASE IT HAD WORKED LOOSE AND WAS PREVENTING THE VLAVE COVER FROM CLOSING COMPLETELY. SO I TOOK IT OUT _________________ 5 e30's 84, 87, 3 90's
4 Boxer motorcycles R75/5, 2 R60/6, and a R90/6
1995 e36 320i auto euro specs from canada, 98 323i auto
2001 e46 325i manual |
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smithpatrick
Joined: 05 Nov 2007 Posts: 44 Location: Southern New Jersey
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Posted: Thu Oct 15, 2009 9:23 pm Post subject: 1990 325i idle control valve problem |
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the idle control valve is receiving differencial voltages with the throttle position switch closed, voltage on the one side is 9 to 10 volts the other is half that causing the crontrol valve to remain closed. creating enough back pressure to suck oil out of the engine case. Why does this happen? _________________ 5 e30's 84, 87, 3 90's
4 Boxer motorcycles R75/5, 2 R60/6, and a R90/6
1995 e36 320i auto euro specs from canada, 98 323i auto
2001 e46 325i manual |
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tncean
Joined: 26 Feb 2005 Posts: 1652 Location: Chattanooga, Tn.
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Posted: Sat Oct 17, 2009 5:48 pm Post subject: |
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Maybe a bad ICV??
t |
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Pirate323i
Joined: 19 Aug 2004 Posts: 404 Location: Sydney, Australia
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Posted: Sat Oct 17, 2009 9:45 pm Post subject: |
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Hey Smithpatrick, that "spacer" actually stops the rocker shafts from rotating. it those shafts are allowed to rotate you will starve your rockers of oil and they will seize...
I would really suggest you go back and clean it all out and reseat that "spacer" tap it in with a hammer if need be, it sits on a taper from memory... but is VERY necessary. _________________ Life is a voyage not a destination... So enjoy!
1989 318i M52B25 24v swap
1989 318i great little car
1983 323i same as picture only red! - Now gone...
1983 323i Written off by some fool running a red light... RIP. |
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