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      10-07-2019, 03:23 AM   #1
Hugo5282
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E87 2005 oil leak

Hello. Can anyone help with what might be the cause of the leak? Im not good with what parts are what, thought perhaps it help me direct my enquiries at the workshop.

Ive just acquired the car and only noticed about 2 weeks after it has had an oil change, perhaps its just the age of the car and seals deteriorate somewhat? Would an additive like liqui moly motor oil saver/oil stop leak a possible solution?

So far, oil indicator/detector shows max oil

Thank you very much
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      10-07-2019, 07:33 AM   #2
JimD
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There is a good chance that the oil leak and the oil change are not related. Is it possible you just noticed the leak after the oil change and it was there before, for instance? But if I assume for a minute that they are related, the two sources affected by the oil change are the cap over the filter which is very visible on the top of the engine, and the oil drain plug on the bottom of the motor and not easy to see. If the o-ring of the filter cap is not down into the motor casting, it will leak. But it tends to leak a lot which is not consistent with your description. I think it is also possible for the drain plug to leak if there are double washers, or no washer, or something on the washer preventing the drain plug from seating correctly on the drain plan. But to check it, you have to be under the car and to really check it you have to remove the drain plug which means another oil change.

I wouldn't do anything about it if the oil level doesn't change. The lack of a change means it is a minor leak and if it is from the drain plug, it will probably be fixed with the next oil change.

Cars tend to leak a little oil. It is also possible that some oil was spilled on the engine in the last oil change and in that event it will stop showing drops on the ground.
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      10-07-2019, 08:42 PM   #3
Hugo5282
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I should have attached pictures, does this help ?
Attached Images
File Type: pdf Leak.pdf (214.5 KB, 34 views)

Last edited by Hugo5282; 10-07-2019 at 11:10 PM.. Reason: insert pictures
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      10-08-2019, 07:54 AM   #4
JimD
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In the last picture, the round black object at the bottom of the picture is the cap over your oil filter. If the rest of the circumfrence looks like what is in the picture, it is not a source of a leak. The other two pictures look like the side of the engine with a little oil on them. Not really possible to say where it came from. The amount could be a spill when oil was added. Or it could be evidence if a leak.
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      10-08-2019, 07:36 PM   #5
Hugo5282
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Thanks so much
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      02-07-2020, 01:56 AM   #6
kinyo
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I have same car. In my case, the cause of leak is defective pressure switch sensor. Once replaced, leak is gone.

Although the written procedure involves removing the alternator for easier access, my mechanic proved it is not necessary. However the battery have to be disconnected, because the thick cable on the alternator have to be moved out of the way.
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