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E34 (1989 - 1995)

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  #1  
Old 02-18-2013, 08:37 PM
jhkim jhkim is offline
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some kind of oil leaking

I have noticed oli marks on the ground after parking. It is getting worse so I'm trying to figure out where it is coming from. '95 525i is pretty old one so I expected a little oil leak but this is stranger than my other old cars because oil drops are happening in multiple area. It turned out that it is dripping from metal bars so it is not direct drops from leaking area. Where could this coming from ? The picture is taken between front wheels so it is not close to engine. The oil on the ground is brown so it looks like engine oil but its position is like where transmission is. Could this be transmission oil ? I hope this is engine oil because refilling engine oil is much easier than transmission oil.
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  #2  
Old 02-19-2013, 04:42 AM
snowsled7 snowsled7 is offline
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Looks like it could be the rear crank seal. That said, it could come from anywhere, you need to follow it up. Could be the valve cover leaking and running down to where it accumulates enough to drip off. Like I said, find the source, could be several things.

Definately looks like engine oil since it appears you have an auto transmission. That fluid should be red/pink. If it is burnt trans fluid, you have another problem...
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Last edited by snowsled7; 02-19-2013 at 04:34 PM.
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  #3  
Old 02-19-2013, 06:07 AM
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clean it all off really good. check it again in a day or so for a more definite source. I assume you have an M50 motor would would make an oil pan gasket highly unlikely. an M20 motor could be the oil pan gasket.

I completely agree with sled's suggestion about the valve cover gasket, and about the tranny oil. I'm colorblind, but that does look a bit red to me?
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  #4  
Old 02-19-2013, 06:12 AM
cutter67 cutter67 is offline
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i would go with rear main seal seeing the location of the oil. if it was the valve cover gasket leaking that bad you would be getting smoke from the exhaust i feel. a valve cover gasket seems never to put that much oil on the ground without other systems
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  #5  
Old 02-19-2013, 06:29 AM
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rear main seal = cheap cheap cheap parts. pricey pricey pricey labor.
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  #6  
Old 02-19-2013, 06:40 AM
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BMR_LVR BMR_LVR is offline
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I have a pretty bad leak just like that. I cleaned it and then started tracing it upwards to find the leak. I found that mine is leaking at the bottom of the dipstick tube, presumably due to a worn o-ring at the bottom of the tube. I just haven't gotten around to replacing it yet.

As the old saying goes, "seek and ye shall find". You just have to go looking for the leak. Also keep in mind that you not only have to look upwards, but you have to look forward some as well since wind will blow the oil droplets backwards under the car some.
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Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold

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  #7  
Old 02-19-2013, 06:48 AM
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first time i've heard of a leak from the dip stick. That should be a relatively easy replacement. next time you do an oil change...
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  #8  
Old 02-19-2013, 07:05 AM
jhkim jhkim is offline
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That gives me a little comfort because it seems like engine oil. In the picture, it looks redish as well but it is just yellow and brown. I will try to trace back next time.
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  #9  
Old 02-19-2013, 07:10 AM
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shouldnt be too bad to clean off. Get some engine degreaser or brake cleaner on there and wipe it all off with a terry cloth
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  #10  
Old 02-19-2013, 04:37 PM
snowsled7 snowsled7 is offline
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Quote:
Originally Posted by cutter67 View Post
i would go with rear main seal seeing the location of the oil. if it was the valve cover gasket leaking that bad you would be getting smoke from the exhaust i feel. a valve cover gasket seems never to put that much oil on the ground without other systems
I only meant to suggest the oil could be coming from many different places, and that it could be coming from much higher up on the engine, so follow the trail was my point, VCG just an example.

Hopefully it is a simple as an o-ring on a dipstick tube
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  #11  
Old 02-19-2013, 06:03 PM
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BMR_LVR BMR_LVR is offline
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Quote:
Originally Posted by snowsled7 View Post
Hopefully it is a simple as an o-ring on a dipstick tube
This is the best picture I could get. It doesn't look like much, but ..... well, lets just say I don't have to worry about anything on the underside rusting.



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Most problems are usually something simple !

Quote:
Originally Posted by noego View Post
It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold

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  #12  
Old 02-19-2013, 06:23 PM
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TWard TWard is offline
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Check for missing oil pan bolts they tend to just drop out sometimes
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  #13  
Old 02-19-2013, 07:20 PM
jhkim jhkim is offline
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loose bolt

That's a good point. Actually I already found one loose blot and missing bolt which hold exhaust. I assume there were two. One is gone and the other was almost gone. The bolt is in the middle of the picture.
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  #14  
Old 02-27-2013, 03:41 PM
jhkim jhkim is offline
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Found the source of oil leak !

I found where the oil is coming from. It is from rear side of engine near front wheel. In the picture, you can see the oil drop which falls to exhaust system. Now the oil is all over the place under the car. Probably I need to replace valve cover gasket ?
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  #15  
Old 02-27-2013, 06:04 PM
snowsled7 snowsled7 is offline
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Looks like the VCG in the picture.
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BMW's from my past...
'92 535i/5 '89 325ix/5
'98 750iL '86 325(e)/5
'95 740iL '84 318i/5
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  #16  
Old 04-07-2013, 06:28 PM
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BMR_LVR BMR_LVR is offline
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Location: Asheboro, NC
 
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Mein Auto: 1992 525i
Replaced the dipstick o-ring today. It wasn't too bad. Here is the result. It's kind of hard to tell what you are looking at, but it is just above the sliver hose connector in the pic. The area is now bone dry

Before:



After:

__________________
Most problems are usually something simple !

Quote:
Originally Posted by noego View Post
It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold

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  #17  
Old 04-07-2013, 07:56 PM
62rebel 62rebel is offline
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Location: Charleston SC
 
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Mein Auto: 1992 525i sportwagon
my '92 started puking oil from the pressure sender cover on the oil filter housing. it was enough that it left a trail behind the car, and i had a devil of a time locating the source. there is a formed rubber gasket there that gets oil-soaked and brittle and cracks, leaking under pressure. it's not hard to replace, just fiddly and you will get filthy doing it.
i did it on Christmas day and topped up with 20w50; just had to add a quart this past week.
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