Lower oil separator return pipe access - BMW M5 Forum and M6 Forums
E39 M5 and E52 Z8 Discussion 1998-2003 Advertiser's Forum

 1Likes
  • 1 Post By M3Fan
 
LinkBack Thread Tools Rate Thread Display Modes
post #1 of 9 Old 2nd May 2019, 02:38 AM Thread Starter
austrianvespaguy
Member, Sport: On DSC: On (>100 posts)
 
austrianvespaguy's Avatar
 
Join Date: May 2018
Location: Dacula, GA
Posts: 104
Thanks: 47
Thanked 3 Times in 2 Posts
Lower oil separator return pipe access

If I have the belts, crank pulley, and harmonic damper off, is it possible to get the oil separator return pipe up out of the oil pan in order to change the o-ring on it, without resorting to removing the thermostat housing or messing with the lower rubber hoses? My hoses seem OK and I don't want scope creep to necessitate cracking open the coolant system on this one if possible; just want to go after the front main seal and perhaps this o-ring to hopefully stem my oil leak. I'm referring to the pipe #5 and o-ring #7. Thanks to anyone that knows whether this is or is not possible before I dive in!
RealOEM.com - Online BMW Parts Catalog
austrianvespaguy is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 2nd May 2019, 07:38 AM
Sailor24
M5 Expert (>4000)
 
Sailor24's Avatar
 
Join Date: Oct 2010
Location: Cobourg Ont
Age: 57
Posts: 9,712
Thanks: 986
Thanked 1,967 Times in 1,651 Posts
Only if you have small Hands and the tools to get at bolt 8. BTW it is hard to do the seal without removing the cover and putting it on a bench. You can do it but it is hard in the car, just depends on your experience and skills.
Sailor24 is offline  
post #3 of 9 Old 2nd May 2019, 01:21 PM Thread Starter
austrianvespaguy
Member, Sport: On DSC: On (>100 posts)
 
austrianvespaguy's Avatar
 
Join Date: May 2018
Location: Dacula, GA
Posts: 104
Thanks: 47
Thanked 3 Times in 2 Posts
Thanks Sailor, I got this great little seal puller that I think should lower the difficulty to just a moderate level. Once I get everything off I'll probably make a slow and careful attempt to see if I can work that pipe out of there, but if it seems like it won't work I'm prepared to give up quickly and just finish the seal. 2.5" diameter PVC pipe is what I need to press in the new seal, correct?
austrianvespaguy is offline  
 
post #4 of 9 Old 2nd May 2019, 02:35 PM
M3Fan
Fellow Member (>400)
 
Join Date: Dec 2012
Location: USA
Posts: 491
Thanks: 4
Thanked 75 Times in 55 Posts
A standard hook-style seal puller gets the front crank seal out, reaching up from below the car, in about 5 seconds. Driving it in requires anything that circumference.

I wonder the same thing about the breather pipe O-ring.

Evolve Alpha-N tune, FMU Rear Exhaust, E60 Shifter
M3Fan is offline  
post #5 of 9 Old 2nd May 2019, 07:10 PM
kiznarsh
Senior Member (>500)
 
kiznarsh's Avatar
 
Join Date: Dec 2016
Location: SoCal
Posts: 502
Thanks: 19
Thanked 42 Times in 40 Posts
Quote:
Originally Posted by austrianvespaguy View Post
Thanks Sailor, I got this great little seal puller that I think should lower the difficulty to just a moderate level. Once I get everything off I'll probably make a slow and careful attempt to see if I can work that pipe out of there, but if it seems like it won't work I'm prepared to give up quickly and just finish the seal. 2.5" diameter PVC pipe is what I need to press in the new seal, correct?

Which seal are you referring to? Talking about the t-stat seal in case you need to remove it?


I'm also leaking from that O-ring but it's not too bad yet. But eventually if I have to replace the water pump & t-stat, then I'll tackle it then, along with the lower oil separator hoses.

'03 M5 | 987.2 Cayman | @kian.ski

Last edited by kiznarsh; 2nd May 2019 at 07:13 PM.
kiznarsh is offline  
post #6 of 9 Old 2nd May 2019, 11:28 PM Thread Starter
austrianvespaguy
Member, Sport: On DSC: On (>100 posts)
 
austrianvespaguy's Avatar
 
Join Date: May 2018
Location: Dacula, GA
Posts: 104
Thanks: 47
Thanked 3 Times in 2 Posts
Holy crap, so far, NOT a very fun job, but making good progress, think I have the old seal out and the new one in! Question though, what seals the oil out of the bolt passages? Whenever I'd pull the bolts out of the holes in the nose of the crank, they'd drag a little stream of oil out with them. I'm assuming this is normal, but I can't figure out what if anything keeps the oil from leaking out past the bolts in normal operation.
austrianvespaguy is offline  
post #7 of 9 Old 3rd May 2019, 03:49 PM
M3Fan
Fellow Member (>400)
 
Join Date: Dec 2012
Location: USA
Posts: 491
Thanks: 4
Thanked 75 Times in 55 Posts
Quote:
Originally Posted by austrianvespaguy View Post
Holy crap, so far, NOT a very fun job, but making good progress, think I have the old seal out and the new one in! Question though, what seals the oil out of the bolt passages? Whenever I'd pull the bolts out of the holes in the nose of the crank, they'd drag a little stream of oil out with them. I'm assuming this is normal, but I can't figure out what if anything keeps the oil from leaking out past the bolts in normal operation.
There is no oil to seal out. Maybe that wept into the bolt holes from the leaky crank seal over time(?) Don't forget to replace those 4 bolts and torque them with an angle gauge.

Evolve Alpha-N tune, FMU Rear Exhaust, E60 Shifter
M3Fan is offline  
post #8 of 9 Old 3rd May 2019, 08:13 PM Thread Starter
austrianvespaguy
Member, Sport: On DSC: On (>100 posts)
 
austrianvespaguy's Avatar
 
Join Date: May 2018
Location: Dacula, GA
Posts: 104
Thanks: 47
Thanked 3 Times in 2 Posts
Quote:
Originally Posted by M3Fan View Post
There is no oil to seal out. Maybe that wept into the bolt holes from the leaky crank seal over time(?) Don't forget to replace those 4 bolts and torque them with an angle gauge.
My guess is that with all 4 bolts out, any oil sitting on the crankshaft can run into the seam between the bit of shaft on the end of the crankshaft with the timing and oil pump chainrings on it and the actual crankshaft itself where the threads are, apparently those are actually 2 different pieces. Anyway, not worrying about it. New bolts arrive today and although I don't have an angle gauge, it generally works quite well for me to mark the bolt head and surrounding part so that I can check how much angle I've actually achieved on the bolts.
austrianvespaguy is offline  
post #9 of 9 Old 6th May 2019, 02:26 AM Thread Starter
austrianvespaguy
Member, Sport: On DSC: On (>100 posts)
 
austrianvespaguy's Avatar
 
Join Date: May 2018
Location: Dacula, GA
Posts: 104
Thanks: 47
Thanked 3 Times in 2 Posts
Whew, all done, but for the record no I couldn't figure out how to get the return pipe out, so that o-ring will need to wait until the thermostat housing comes off some time in the future! On the plus side, it does seem that the real leaks was from the main seal, and so far (about 100 miles), still dry down there!
austrianvespaguy is offline  
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW M5 Forum and M6 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil thread with Lab Analyst First e28 M5 E34 M5 Discussion 239 27th March 2018 10:01 AM
How I resolved my oil consumption issue... suggestions for other sufferers Vindicator E39 M5 and E52 Z8 Discussion 82 11th March 2018 11:56 PM
S85 V10 oil level service bulletin cobradav E63 BMW M6 Forum and BMW M6 Convertible | m6board.com 6 7th February 2018 06:24 AM
DIY: Rod bearing change ger E39 M5 and E52 Z8 Discussion 21 25th October 2017 03:03 AM
Another Dealer Oil Overfill Question? EM_5 E60 M5 and E61 M5 Touring Discussion 11 4th March 2011 03:50 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome