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Old 01-24-2013, 09:18 AM   #1
jcns
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OFHG done, oil leak persists

I had an oil leak on the driver side of the engine.
After much research and reading on this site, I narrowed it down to the OFHG. i did the job in about 3 hours. Cleaned everything.
I still have an oil leak.
No, it's not the VCG. I checked
Any and suggestions appreciated.
Thanks
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Old 01-24-2013, 09:20 AM   #2
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It's most likely the oil separator. It's under the disa valve and also a part of the CCV system. GL!
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Old 01-24-2013, 09:32 AM   #3
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vanos oil line?
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Old 01-24-2013, 10:13 AM   #4
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VANOS line(s) or crush washers, Oil filter top cap or lines, CCV lower oil return line.

See the first link in my signature below for pictures of the CCV lower oil return hose problems.

Also you likely will need to remove your dipstick tube and clean it out, the tube is double walled and will clog easily over time.

Check this link out, especially my comments toward the end - http://forum.e46fanatics.com/showthr...164&highlight=

I have a copy of the BMW SIB and pictures of what the dipstick tube looks like.
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Lower hose fan switch O-ring - BMW #13621743299
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Old 01-24-2013, 10:17 AM   #5
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I've replaced my VCG, the VC too, the CCV+all lines and the OFHG, clear dipstick tube and I still have a leak somewhere I can't find. Very frustrating.
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Old 01-24-2013, 10:21 AM   #6
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Might be the rear main seal..
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Old 01-24-2013, 03:27 PM   #7
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Got a question about ccv failure symptoms. If the CCV fails, would the car burn oil? Would I see smoke out of the exhaust? My exhaust is normal. RPM is normal, nothing erratic about it.
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Old 01-24-2013, 03:33 PM   #8
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If CCV oil drain is restricted you could burn oil and many times you will not see it due to Cats cooking it. The dipstick tube is a prime culprit that is very often overlooked.
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Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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Lower hose fan switch O-ring - BMW #13621743299
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Old 01-24-2013, 03:38 PM   #9
jcns
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Quote:
Originally Posted by jfoj View Post
If CCV oil drain is restricted you could burn oil and many times you will not see it due to Cats cooking it. The dipstick tube is a prime culprit that is very often overlooked.
I will check the dipstick tube.
how bad of job is it to replace it? Is it a complex job of moving tons of stuff and replace a ton of stuff while I am at it type?
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Old 01-24-2013, 04:09 PM   #10
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Quote:
Originally Posted by jcns View Post
I will check the dipstick tube.
how bad of job is it to replace it? Is it a complex job of moving tons of stuff and replace a ton of stuff while I am at it type?
The dipstick tube is underneath the throttle body. There is a single bolt that holds the dipstick tube in place on the side of the engine block and it just pulls out. The CCV drain tube is connected to the dipstick and will have to be replaced as it is cut off to remove the dipstick tube. It is simpler, well quicker, than the OFHG.
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Old 01-24-2013, 04:54 PM   #11
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Quote:
Originally Posted by jcns View Post
I will check the dipstick tube.
how bad of job is it to replace it? Is it a complex job of moving tons of stuff and replace a ton of stuff while I am at it type?
Not too hard of a job, like the other poster indicated, I think it is just 1 bolt, might be a bit tricky to get too?

Plan on and order CCV lower oil return hose, dipstick tube O-ring, dip stick O-rings.

To clean out the dual wall you need wire or find an old windshield wiper insert and use the thin metal wiper blade insert support to scrub and scrape out sludge along with some carb cleaner and maybe some compressed air.

Make sure the dual wall cavity is very clean and make sure the tube sits back in the block correctly.
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Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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Old 01-24-2013, 06:58 PM   #12
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Thank you everyone.
I will check it out this weekend.
I will report back with results
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Old 01-24-2013, 07:11 PM   #13
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First two posts...ccv or vanos oil line...which will leak at crush washers (replace all 4) or at the crimps...especially after doing the ofhg...if you overstretched it or something...it will seep from crimps. Hose is $40...the time to do it was when you were there anyway, but I think you can get to it pretty easily anyway...especially if doing ccv. Don't bother with just the dipstick, though...do the whole CCV. By the time you get dipstick out, I think you'll have a lot of the stuff you'd need out to do the ccv anyway. The vent hose is very brittle...and it will crack and seep oil down too.
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Old 01-24-2013, 07:20 PM   #14
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Rear Main Seal, Crankshaft Seal, Vanos Oil Line
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