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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 06-17-2011, 09:28 AM   #1
pjo33us
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Oil leak

Hey guys...

Asked the question over in the 2 wheeler forum but thought better of it...

I have an oil leak. I used about 1qt in 3000 miles. There is no puddle or drip on the floor of my garage or my parking spot at work. I do see oil on the lower part of the block by the drivers side motor mount right next to the steering doughnut. After that it seems to drop on my axle and spin around my wheel well. It leaves a thin vertical line of residue on the steering rack boot.

I know that standard operating procedure is to clean everything up, drive it and see if you can figure out the leak from there. I have done that. It is coming from the area under the intake near the throttle body. This is the CCV valve right? Do these leak? Anything else that you guys think this could be. VCG?

Also, when I do the CCV I had planed on replacing the oil filter housing gasket, throttle body gasket and intake boot as well. Anything else I just should do while I am in there?

Thanks.
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Old 06-17-2011, 09:32 AM   #2
SamDoe1
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I think you're right that this sounds like the CCV. It won't be the valve cover since that's on the other side of the engine bay from where you seem to be getting the leak.

While you're in there, you should also evaluate the condition of the DISA valve and clean up the idle control valve and MAF sensor.

Good luck!
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Old 06-17-2011, 09:42 AM   #3
pjo33us
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Thanks, I think this is the culprit as well but just wanted to check with you guys first as this looks like a big PITA job to do. How do I evaluate the DISA valve? I do notice a slight hesitation in the throttle response when the car is just starting out in the morning (engine either cold or warmed up)... I put this down to the intake boot, which I am replacing or the ICV (which I will clean out). What exactly does the DISA valve do?
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Old 06-17-2011, 10:39 AM   #4
allthem
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Might also check oil filter housing gasket.

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Old 06-17-2011, 10:46 AM   #5
pjo33us
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Might also check oil filter housing gasket.

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Good call...that is in the plan as well while I have the thing on the operating table.
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Old 06-17-2011, 11:06 AM   #6
Kubica
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I'm going to guess oil filter housing gasket. Do the CCV at the same time as the OFHG- much easier job. Two birds.
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Old 06-17-2011, 11:20 AM   #7
pjo33us
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Yup, that is what I figured... may as well.
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Old 06-17-2011, 12:32 PM   #8
ECSTuning
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We have complete DIY CCV kits available below in several levels...

Our Level 2 Cold Climate kit includes the following:

Oil separator - BMW cold climate recommended
Hose from oil separator to dipstick tube - BMW cold climate recommended
Hose from oil separator to valve cover
Hose from intake manifold back to the connector hose
Hose from oil separator up to the intake manifold
Throttle body gasket
Throttle body inlet boot
ICV rubber grommet
Oil dipstick tube o-ring seal

Click HERE for more information.


Please let us know if you have any questions! Feel free to shoot me a PM or email.

Best,
Joe
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Old 06-17-2011, 12:40 PM   #9
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Might also check oil filter housing gasket.

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that is a #2 culprit. A $4.00 part and four hours labor.
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Old 06-17-2011, 12:46 PM   #10
pjo33us
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I know it... I figured on making a weekend out of this job. I just want to make sure I don't need to go back in for something else.
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Old 06-17-2011, 05:55 PM   #11
allthem
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that is a #2 culprit. A $4.00 part and four hours labor.

Yep, just fixed mine last weekend. it started as a small leak, ended up making a big mess!
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Old 06-18-2011, 11:16 AM   #12
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To know if it's the oil filter housing gasket, clean the honeycomb area on the side of the engine bay SPOTLESS, after driving for a few min you will see if the oil is trickling down from the gasket down to the honeycomb area.
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Old 06-26-2011, 07:44 AM   #13
pjo33us
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Anyone now if a clogged CCV would disable the car? My wife drove it a few times yesterday. Went out again, it started and idles rough then stalled out and would not start... I have not pulled any codes yet (dont have a PEAK but I will run down to Harbor Frieght and get a cheap reader today) but I have the yellow SES light on. Car now cranks but will not catch. I do not smell gas but fuses look ok. Question is: Would a clogged CCV disable the car?

Oh, meant to add, I see oil residue on top of the air cleaner and on top of the E-tank rad cap... Thanks guys.
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