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#3467895 - 08/28/14 08:49 PM Re: E60 BMW 528i Oil Pan Leak [Re: The Critic]
Apollo14 Offline


Registered: 08/18/14
Posts: 884
Loc: CA
I am way out of my depth here, but could he use non aluminium reusable bolts, replace them one at a time (so he doesn't have to remove the entire oil pan), and then see if the leak stops.

If it doesn't, then do the fuller repair.

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#3467953 - 08/28/14 10:12 PM Re: E60 BMW 528i Oil Pan Leak [Re: Apollo14]
Trav Offline


Registered: 11/20/06
Posts: 15904
Loc: MA, Mittelfranken.de
Sure if in the unlikely event for some reason one had come loose, just use a low torque value like 10Nm.
For some reason they feel it needs a TTY bolt, being a small diameter bolt going into aluminum maybe they feel this isn't possible with a steel bolt. Just a guess.

I suspect someone has just used regular 8.8 flange bolts with a bit of blue loctite and torqued them to 12 Nm and had no problem. Its not spec so i wouldn't recommend it on a customer car.
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#3468156 - 08/29/14 08:19 AM Re: E60 BMW 528i Oil Pan Leak [Re: Fleetmon]
demarpaint Offline


Registered: 07/03/05
Posts: 27359
Loc: NY
Originally Posted By: Fleetmon

And, only a tool would try to re-torque a one-time-use aluminum TTY bolt. Doing so will cause a lot of uncomfortable, timely work.


+1
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#3469775 - 08/31/14 02:51 AM Re: E60 BMW 528i Oil Pan Leak [Re: The Critic]
KDonkey Offline


Registered: 10/17/13
Posts: 71
Loc: Virginia
As has been noted the installation torque is very low. I have found loose oil pan bolts on one of my BMW's.

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#3469789 - 08/31/14 04:27 AM Re: E60 BMW 528i Oil Pan Leak [Re: The Critic]
Merkava_4 Online   content


Registered: 01/30/07
Posts: 15594
Loc: Clovis, CA
I guess it's possible for a RWD car to have a subframe; I was just under the impression that only FWD cars have a subframe. By the way, some manufacturers use the term "Engine Cradle."

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#3469828 - 08/31/14 07:26 AM Re: E60 BMW 528i Oil Pan Leak [Re: The Critic]
MCompact Offline


Registered: 07/21/02
Posts: 3338
Loc: KY
Have you verified that it is actually the pan gasket? The oil filter housing gasket can make a huge mess. That said, the pan gasket is starting the seep on my son's 165k mile 2004 X3 2.5- talk about a PITA job...
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#3470320 - 08/31/14 08:13 PM Re: E60 BMW 528i Oil Pan Leak [Re: Merkava_4]
bdcardinal Offline


Registered: 06/03/05
Posts: 9722
Loc: Santa Barbara, CA
Originally Posted By: Merkava_4
I guess it's possible for a RWD car to have a subframe; I was just under the impression that only FWD cars have a subframe. By the way, some manufacturers use the term "Engine Cradle."


All the 79+ Mustangs have front subframes, usually referred to as K members. It is what you pretty much have to have with a unibody RWD platform.
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#3476736 - 09/07/14 04:46 PM Re: E60 BMW 528i Oil Pan Leak [Re: The Critic]
The Critic Offline


Registered: 08/30/04
Posts: 19106
Loc: Walnut Creek, CA
Yesterday, the car was in my possession to replace the thrust-arm/tension strut assemblies and to perform a vehicle check. So, I took the opportunity to take some pictures of the leak in question:

Undercovers removed:
DSC_1308 by thecritic89, on Flickr

DSC_1309 by thecritic89, on Flickr

DSC_1313 by thecritic89, on Flickr

Drops of oil around some of the oil pan screws:

DSC_1315 by thecritic89, on Flickr

Major splatter, or drain plug leak? Probably both:

DSC_1310 by thecritic89, on Flickr


Edited by The Critic (09/07/14 04:48 PM)
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#3477031 - 09/07/14 09:40 PM Re: E60 BMW 528i Oil Pan Leak [Re: The Critic]
hattaresguy Offline


Registered: 06/01/11
Posts: 7180
Loc: CT
It doesn't look that terrible. I'd wipe it down, replace the drain plug crush washer since that looks like its leaking and watch it. You could try to throw a wrench on the pan bolts and see if they will tighten a bit.

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#3477188 - 09/08/14 08:17 AM Re: E60 BMW 528i Oil Pan Leak [Re: hattaresguy]
Vikas Offline


Registered: 07/22/05
Posts: 10982
Loc: NorthEast
Originally Posted By: hattaresguy
It doesn't look that terrible. I'd wipe it down, replace the drain plug crush washer since that looks like its leaking and watch it. You could try to throw a wrench on the pan bolts and see if they will tighten a bit.
You must be new to this topic! Both these suggestions were shot down previously.

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#3477366 - 09/08/14 12:04 PM Re: E60 BMW 528i Oil Pan Leak [Re: The Critic]
hattaresguy Offline


Registered: 06/01/11
Posts: 7180
Loc: CT
Oh than spend money and pull it all apart.

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#3477370 - 09/08/14 12:08 PM Re: E60 BMW 528i Oil Pan Leak [Re: The Critic]
Quattro Pete Offline


Registered: 10/30/02
Posts: 33674
Loc: Great Lakes
Have you inspected the oil filter housing gasket yet? That often leaks, and when it does, it makes the whole bottom of the engine look messy, making one think it's the oil pan gasket.
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#3477569 - 09/08/14 03:50 PM Re: E60 BMW 528i Oil Pan Leak [Re: hattaresguy]
Vikas Offline


Registered: 07/22/05
Posts: 10982
Loc: NorthEast
Originally Posted By: hattaresguy
Oh than spend money and pull it all apart.
Well, from reading everything so far, that is exactly he plans to do.

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#3477746 - 09/08/14 07:26 PM Re: E60 BMW 528i Oil Pan Leak [Re: The Critic]
hattaresguy Offline


Registered: 06/01/11
Posts: 7180
Loc: CT
If it were my old BMW I just wanted another couple of years out of, I'd fix the leaking oil pan drain plug for starters with probably a $.60 cent crush washer.

Than I would try to tighten the pan bolts.

After that I would just put cardboard down than trade it on, it looks to be a fairly minor leak. How much make up oil is added? If its less than a quart per 3k ignore it.



Edited by hattaresguy (09/08/14 07:28 PM)

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#3478018 - 09/09/14 02:14 AM Re: E60 BMW 528i Oil Pan Leak [Re: The Critic]
The Critic Offline


Registered: 08/30/04
Posts: 19106
Loc: Walnut Creek, CA
Trust me guys, I'm not that excited about this job. I'd rather go do a few suspension overhauls than an oil pan reseal on this beast. I already explained to the owner that he should just leave it alone, but he wants it fixed.

With that said, it does appear that the oil drain plug is part of the problem, but there's also oil coming from each of the oil pan bolt holes. He recently had the oil filter housing and valve cover resealed, but I will re-check those areas.
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