Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #21  
Old 02-11-2019, 03:28 PM
Member
 
Join Date: Nov 2014
Location: SF Bay Area
Posts: 793
oldskewel is on a distinguished road
Quote:
Originally Posted by cn90 View Post
The video below shows a very comprehensive review of ALL possible oil leak sources for M54 engine.

Pay attention to time marking 2:45 where the person discussed the RMS, note the particular bolt I mentioned in earlier threads? It is wet with oil in the video. So I am very convinced that the oil at that particular bolt is from a RMS leak. If you do the CCV Mod, then it keeps the leak down to a minimum.

https://www.youtube.com/watch?v=TyTL8wosXKo
Great video. I'm not worried about it, but I think I've got a RMS leak on my 2001 M54B30. So far, it's nothing the stiffening plate can't handle.

When I rebuilt the top end last summer and had things pretty well stripped down, I inspected the oil pan seam for leaks and it seemed perfect. I tried putting some torque on each bolt (pretty low, they are M6, and I think the manual specifies 10 Nm if they are class 8.8 and 14 Nm if the bolts are marked class 10.9 [all this from memory, so look it up]) and nothing at all moved.

Looking at the video, e.g., the frame at 3:12 with a view of the back face of the engine, ...

https://youtu.be/TyTL8wosXKo?t=192

you can see the residual oil that is directly below the crankshaft at the engine-AT interface. With that view, and also seeing the oil on the lower part of the RMS, it seems clear that the oil is leaking past the RMS, then down into the cavity below, and finally leaking through the unsealed gap between the engine pan and the AT.

But without that view, it might not be clear whether it is the RMS or the oil pan gasket right below the RMS that is leaking. Both would exit at the same point below. So that's when you might (I do) figure that if the rest of the oil pan gasket is tight, the chances that it's leaking right below the RMS is not likely, and it's probably the RMS. So that's what I'm concluding for now.

BTW, I've also come across a case on this forum for the M54 where it was actually the AT front seal leaking, still exiting at that point, looking brown like engine oil vs. red like DEXRON VI (or III) as it exited. Disassembly confirmed it was the AT. Interesting.

And it makes perfect sense that the oil pan gasket, if it leaks, would leak in areas near the axle, with more stuff going on there to disturb things.
__________________
2001 X5 3.0i, 180k miles, AT, owned since 11/2014
Reply With Quote

Sponsored Links

  #22  
Old 02-11-2019, 03:34 PM
dkl's Avatar
dkl dkl is offline
Member
 
Join Date: Mar 2005
Location: Southern Cal
Posts: 2,766
dkl is on a distinguished road
Great discussion on the "gasket cut trick" - Thanks! I may bring this up with my indie and see if he's willing to try it.
__________________
2004 X5 3.0i
Born 02/04
Delivered 03/04
Reply With Quote
  #23  
Old 02-11-2019, 03:51 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 3,934
andrewwynn is on a distinguished road
i love it; nothing the stiffen plate can't handle; of course it's the FOAM on the top that does most of the handling :-D I replaced my foam after i fixed a bit oil leak and then a few months later i finally got an 'old age' leak
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
  #24  
Old 02-11-2019, 04:57 PM
Member
 
Join Date: Jun 2009
Location: Irvine, CA
Posts: 52
Don Nguyen is on a distinguished road
Does anyone know if there is a kit for the oil pan gasket that includes the oil pan bolts as well? I have seen a few people mention that those should be replaced at the same time when doing the gasket? I am also assuming people are only going with the OEM oil pan gaskets from BMW and not using victor reinz gaskets for the oil pan?
Reply With Quote
  #25  
Old 02-11-2019, 08:02 PM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 3,934
andrewwynn is on a distinguished road
They aren't torque to yield no need to replace. They aren't even very strong. Determine what grade and you can just order a batch from Amazon. On the 8 cyl there are about three that are a different length so something to be aware about


Sent from my iPhone using Tapatalk Pro
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
  #26  
Old 02-11-2019, 08:18 PM
Member
 
Join Date: Jun 2014
Location: Omaha, NE
Posts: 1,151
cn90 is on a distinguished road
The video below showed a guy replacing his BMW E46 RMS, note at time marking 2:00, he pointed to oil in that particular bolt head (roughly at 5:30 o'clock when viewed from behind looking to the front of the car). His leak was solved by new RMS.

So I am very convinced that the oil on that bolt head (roughly at 5:30 o'clock when viewed from behind) is from a minor RMS leak. I already did the BavarianE39 CCV Mod, so it is just a minor leak, maybe one qt every 5K miles etc. Nothing to worry about.

This is so others who have the leak at that bolt can diagnose it properly (clean the dirty oil first), drive around for 100-200 miles, if you see drops of oil at that bolt head, then you have a RMS leak.


https://www.youtube.com/watch?v=jaLgoTjk0yM
__________________
1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
Reply With Quote
  #27  
Old 02-11-2019, 08:23 PM
Member
 
Join Date: Jun 2014
Location: Omaha, NE
Posts: 1,151
cn90 is on a distinguished road
O.P.,

- How many miles in your E53 M54 engine?
- I have not read every paragraph but did you replace the OFH Gasket yet?
- For the oil pan gasket: BMW only (no aftermarket), it is not expensive.

BTW, if the leak is minor, live with it.
- Again, I'd appreciate if you can do the BavarianE39 CCV Mod (crankcase vacuum will increase) and report back if it stops (or minimize) your presumed RMS leak. I'd love to know if increased crankcase vacuum solves the RMS leak!
__________________
1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
Reply With Quote
  #28  
Old 02-11-2019, 08:56 PM
bcredliner's Avatar
X HP/TQ increase = $1.00 X 100X
 
Join Date: Jun 2008
Location: Little Elm,Texas. (40 minutes North of Dallas)
Posts: 6,778
bcredliner is on a distinguished road
Source of fluid leaks are often deceiving. I always clean the engine and then let it idle until it has been at operating temp for a few minutes. I usually wait until next morning and use a bright white small flashlight to follow the trail from exit point toward the top of the engine. I do that at least twice to be sure of the source.
__________________
X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
Reply With Quote
  #29  
Old 02-11-2019, 10:07 PM
Member
 
Join Date: Jun 2009
Location: Irvine, CA
Posts: 52
Don Nguyen is on a distinguished road
Quote:
Originally Posted by andrewwynn View Post
They aren't torque to yield no need to replace. They aren't even very strong. Determine what grade and you can just order a batch from Amazon. On the 8 cyl there are about three that are a different length so something to be aware about


Sent from my iPhone using Tapatalk Pro
Ah ok. So it's not like the aluminum bolts for the oil that come on some of the newer cars/models.


Quote:
Originally Posted by cn90 View Post
O.P.,

- How many miles in your E53 M54 engine?
- I have not read every paragraph but did you replace the OFH Gasket yet?
- For the oil pan gasket: BMW only (no aftermarket), it is not expensive.

BTW, if the leak is minor, live with it.
- Again, I'd appreciate if you can do the BavarianE39 CCV Mod (crankcase vacuum will increase) and report back if it stops (or minimize) your presumed RMS leak. I'd love to know if increased crankcase vacuum solves the RMS leak!

About 185k miles. I did not replace the OFH yet, but my driver side is relatively dry in comparison to the passenger side. I've checked the area around ofh and the waffled areas. It is mildly dirty, but not as much as it is on the rear/passenger areas of the engine.

I've attached a picture of how much oil leaks off of the stiffening plate after sitting for only 1-2 days. This is without having driven the car.

I am going to most likely follow the process below:

Order new oil pan gasket

Tighten the oil pan bolts and then let the engine sit for a day or two to see if there is any oil leaking still. If it is still leaking quite a bit, then with the stiffening plate already off, I'll just go through the process of replacing the gasket at the same time.

Ideally this solves the major oil leaks. If it doesn't, then at that point, I may look at the CCV mod and/or RMS/etc.
Attached Images
 
Reply With Quote
  #30  
Old 02-11-2019, 10:21 PM
Member
 
Join Date: Jun 2014
Location: Omaha, NE
Posts: 1,151
cn90 is on a distinguished road
I'd do the OFH Gasket first ($6 item at dealer) simply b/c it is easy and at 185K miles, it is probably leaking anyway.

I HAD similar leak on the stiffening plate, I replaced the OFH gasket and problem was solved. That was 4 years ago.

When doing the OFH, search for bimmerfest E39 DIY I wrote over there. I also wrote similar DIY in this Xoutpost E53 forum.

The key with M54 is to tighten the 6 bolts in sequence, waiting a few minutes in between to allow the gasket the seat properly.

Make sure you clean the old oil, otherwise it will continue to drip down for a while, making you think that the new OFH gasket did not fix the problem. This happened to me b/c I did not clean the old oil well, one week after new OFH gasket, I saw some oil but it turned out to be residual oil.
__________________
1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 01:04 PM.
vBulletin, Copyright 2019, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.