Another leak I cant Win...
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Joined: Oct 2011
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From: East Coast
My Ride: 04' 545, 6 Spd Manual, Blk Lthr, Sport Pkg, Sport Sts, Logic 7, Cold Wthr Pkg, Full L.E.D. Interior, Red Eng. Cvr, Mtech Front Bmpr, M5 Spoiler, Matte Blk Grill, Red Caps, Slttd & Drlld Rotors, 20
Model Year: 2004
Took off the undercarriage cover to get familiar with the parts to get ready to tackle alternator bracket gasket. Under carriage had oil on the passenger side. I cant really tell if its dripping down from the upper timing cover (looks like it could be from a corner isnt that wet though, vacuum pump or if it may be the oil pressure switch. Im not getting any fault messages for the sensor. It is wet down there. Guess Ill be busy this weekend. Also what is the best method for getting the grime from old oil off these parts when I go in to do these repairs?
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Joined: Mar 2011
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From: Boston
My Ride: '06 530i, '07 C280 4matic, '98 ML320
Very likely from oil pressure switch and/or the vaccum pump.
After wiping off the excess oil, you can spray brake parts cleaner for cleaning up the grease/oil stains.
After wiping off the excess oil, you can spray brake parts cleaner for cleaning up the grease/oil stains.
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Members
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Joined: Oct 2011
Posts: 465
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From: East Coast
My Ride: 04' 545, 6 Spd Manual, Blk Lthr, Sport Pkg, Sport Sts, Logic 7, Cold Wthr Pkg, Full L.E.D. Interior, Red Eng. Cvr, Mtech Front Bmpr, M5 Spoiler, Matte Blk Grill, Red Caps, Slttd & Drlld Rotors, 20
Model Year: 2004
Here is a better pic...
Thread Starter
Members
Senior Members
Joined: Oct 2011
Posts: 465
Likes: 1
From: East Coast
My Ride: 04' 545, 6 Spd Manual, Blk Lthr, Sport Pkg, Sport Sts, Logic 7, Cold Wthr Pkg, Full L.E.D. Interior, Red Eng. Cvr, Mtech Front Bmpr, M5 Spoiler, Matte Blk Grill, Red Caps, Slttd & Drlld Rotors, 20
Model Year: 2004
Thread Starter
Members
Senior Members
Joined: Oct 2011
Posts: 465
Likes: 1
From: East Coast
My Ride: 04' 545, 6 Spd Manual, Blk Lthr, Sport Pkg, Sport Sts, Logic 7, Cold Wthr Pkg, Full L.E.D. Interior, Red Eng. Cvr, Mtech Front Bmpr, M5 Spoiler, Matte Blk Grill, Red Caps, Slttd & Drlld Rotors, 20
Model Year: 2004
Glad you told me that.... I was reading thru one of these threads and someone ask if the oil had to be drained for the alternator gasket someone wrote NO because the oil will be at the bottom of the engine. I didn't buy any oil for this job.
You probably got the threads mixed up. Someone probably said that about the oil pressure switch. There's no way you could do the alternator bracket without draining the oil.
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Joined: Jul 2010
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From: socal
My Ride: 545I and a half dozen other rides
alternator bracket is above the oil level, no need to drain oil. Fortunately/Unfortunately I've done a half dozen of these now and know. 
Just be happy you do not have the 745 with the external oil cooler lines behind the alternator!

Just be happy you do not have the 745 with the external oil cooler lines behind the alternator!
Last edited by healthservices; Jan 26, 2013 at 09:09 PM.


