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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Jul-05-2018, 07:01:41 AM   #1
zingbmw
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Default help finding source of oil leak

I saw a bit of oil behind the front wheel, while I was messing with the abs sensors. I attached a pic I took from behind the front wheel and one from under the hood. You can see the two shiny hoses in the middle of the pic. The clean spot on the other pic is a bit I wiped away to make sure it wasn't just dirt. The head gasket is clean on the sides and the back felt fine when I checked it after a valve job months ago.

Any ideas where the oil could be coming from?
Attached Images
File Type: jpg under hood oil leak.jpg (401.2 KB, 91 views)
File Type: jpg oil leak looking through front driver wheel well.jpg (307.4 KB, 81 views)
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Old Sun, Jul-22-2018, 07:17:28 PM   #2
zingbmw
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Default Re: help finding source of oil leak

No ideas guys?
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Old Sun, Jul-22-2018, 09:11:28 PM   #3
Chapelle
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Default Re: help finding source of oil leak

Looks like power steering reservoir and/or hoses. Check clamps under reservoir.
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Old Sun, Jul-22-2018, 09:56:08 PM   #4
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Default Re: help finding source of oil leak

Yeah, not too many places on driver side. Check power steering per Chap, those hoses/clamps seep a lot from the reservoir.

Can you tell the difference by color or smell if its oil or atf?

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Happy to help with VANOS or any other DIY job around NorCal
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Old Sun, Jul-22-2018, 09:58:56 PM   #5
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Default Re: help finding source of oil leak

Ah, forgot, another key one on driver side is the oil filter housing gasket. Hopefully you can nail down what it is by inspecting the ps hoses.

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'85 528e 164k miles (sold)
'05 M3 6MT coupe

All DIY: 330 ZHP steering rack, diffsonline 4.1 diff with rem polish, E60 short shifter lever, AKG black diff bushings/subframe bushings, Rogue rtab, WPC rod bearings, Beyer driveshaft, full SS (SS stepped V1, catted S1, resonated S2, SS sport), Sachs clutch/flywheel, rear main, VANOS bullet proofing with anti-rattle, valve adjustment, cooling refresh, Ohlins R&T/Swift 448f 672r/GC street tops and camber plates, AFD E85 Proflex kit.

Happy to help with VANOS or any other DIY job around NorCal
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Old Mon, Jul-23-2018, 12:19:21 AM   #6
walid.m3
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Default Re: help finding source of oil leak

Quote:
Originally Posted by mrgizmo04 View Post
Ah, forgot, another key one on driver side is the oil filter housing gasket. Hopefully you can nail down what it is by inspecting the ps hoses.

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Exactly what I was thinking. I've had this before.
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Old Mon, Jul-23-2018, 11:02:33 PM   #7
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Default Re: help finding source of oil leak

could you have overfilled your P/S fluid? the cap is vented and can leak fluid even at the right level
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Old Wed, Jul-25-2018, 02:16:57 PM   #8
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Default Re: help finding source of oil leak

I recently had a leak in the same area and it turned out to be the gasket/seal at the location where the dipstick goes into the oil pan.
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Old Tue, Jul-31-2018, 01:53:20 AM   #9
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Default Re: help finding source of oil leak

did power steering fluid a long time ago and this leak is fairly recent, so i doubt its overflow. will check all the ps hoses though (already replaced the one on the bottom of car that always seems to leak) and will check where the dipstick goes into oil pan.
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Discussing help finding source of oil leak in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)