Failed chain guide replacement - BMW M5 Forum and M6 Forums
E39 M5 and E52 Z8 Discussion 1998-2003 Advertiser's Forum

 12Likes
Reply
 
LinkBack Thread Tools Rate Thread Display Modes
post #1 of 32 Old 15th February 2017, 09:01 PM Thread Starter
bikhe
Junior Member, warming up (<31 posts)
 
Join Date: Jan 2013
Location: Santa Fe NM
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Failed chain guide replacement

Greetings. My 2003 E39 M5 w/139k mi. has plastic chain guide pieces in the oil pan (removed to inspect after possible chain rattle noise occurred). My mechanic is estimating 45 hrs as well as removal of the heads once the engine is removed from the chassis, per his BMW advised procedure for this job of replacing only the main chain guides. Looking at misc. pix of the engine with front cover and VANOS off, it doesn't seem as if much more would need to be done to replace the main chain guides and tensioner rail (along with the main chain if deemed necessary) once one had gotten in this far - engine in or out of the car. Am I missing something? Can the factory service manual for the entire S62 engine or the section for this job be obtained? Thanx!
bikhe is offline  
Sponsored Links
Advertisement
 
post #2 of 32 Old 15th February 2017, 09:13 PM
putty_thing
Member, Sport: On DSC: On (>100 posts)
 
Join Date: Jan 2014
Location: Southampton, UK
Posts: 145
Thanks: 42
Thanked 9 Times in 9 Posts
I've rebuilt the motor from heads off a couple of times, and I'm not sure why you'd need to remove a head if you were doing just the chain guides.

I'd imagine it could be done with the engine in the car too - still a lot of disassembly, but not as much as pulling the whole motor out.
putty_thing is offline  
post #3 of 32 Old 15th February 2017, 09:38 PM Thread Starter
bikhe
Junior Member, warming up (<31 posts)
 
Join Date: Jan 2013
Location: Santa Fe NM
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Yes, it seems the portion of the head gasket that seals between the upper and lower timing covers might be at risk but that would not be a big problem in any case.
bikhe is offline  
 
post #4 of 32 Old 16th February 2017, 12:05 AM
dannyzabolotny
Member, Sport: On DSC: Off
 
dannyzabolotny's Avatar
 
Join Date: Oct 2015
Location: Chandler, AZ
Posts: 276
Thanks: 1
Thanked 15 Times in 14 Posts
Garage
Your mechanic is ripping you off... the engine doesn't need to come out and the heads certainly don't need to come off. Tons of members on here have done their chain guides without removing the engine.

2000 540i Touring - current DD
2000 M5 - sold
dannyzabolotny is offline  
post #5 of 32 Old 16th February 2017, 02:10 AM Thread Starter
bikhe
Junior Member, warming up (<31 posts)
 
Join Date: Jan 2013
Location: Santa Fe NM
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Well, yes, and there is this, too: Rod Bearing and Chain Guide Replacement.
But before I put the question to my mechanic and tell him try and sell me the job I want to make sure there is no relevant consideration AT ALL that could justify the extra work. Like the integral timing cover gasket; for instance: - are they prone to fail when the timing covers are removed around them? Or something else?
bikhe is offline  
post #6 of 32 Old 16th February 2017, 07:08 AM Thread Starter
bikhe
Junior Member, warming up (<31 posts)
 
Join Date: Jan 2013
Location: Santa Fe NM
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Hmmm . . . So . . . perhaps those who have successfully performed a chain-guide replacement either WITH or WITHOUT having any front cover sealing problems could poll themselves and report their thumbs-up or thumbs-down experience? Even six people responding installers would tell us all something, if it was an issue at all. What say? This could go into the repair archives (?).
bikhe is offline  
post #7 of 32 Old 16th February 2017, 07:31 AM
Thumper600
Addicted Member (>300 posts)
 
Thumper600's Avatar
 
Join Date: Feb 2014
Location: Colorful Colorado
Posts: 328
Thanks: 6
Thanked 17 Times in 17 Posts
Garage
there are at least three threads on how to replace the chain guides in this forum, and as for removing the motor? Why don't you just unbolt the front clip and get to everything that way?
Thumper600 is offline  
post #8 of 32 Old 16th February 2017, 01:18 PM
technician117
M5 Guru (>2000 posts)
 
technician117's Avatar
 
Join Date: Nov 2010
Location: Sanborn, NY
Age: 31
Posts: 2,088
Thanks: 111
Thanked 252 Times in 214 Posts
Garage
I agree with above. It sounds like your mechanic has not done this work before. That doesn't mean he's not qualified. He may just be being cautious and "by the book".

I would also recommend only removing the front clip and doing the work from there. You don't gain much from removing the engine except for the ability to raise the engine higher so you're not bending over... but your mechanic has a lift so that is easily overcome with the engine still in the car.

I would approach him with facts from here, but try not to put him off.

Tim

UUC dssr and shifter
Supersprint headers with Tubi catback
Jailbreak tuning
Dinan 3.45
JED lightened flywheel
258,000 miles and counting...
technician117 is offline  
post #9 of 32 Old 16th February 2017, 04:23 PM Thread Starter
bikhe
Junior Member, warming up (<31 posts)
 
Join Date: Jan 2013
Location: Santa Fe NM
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
bikhe is offline  
post #10 of 32 Old 17th February 2017, 05:33 PM Thread Starter
bikhe
Junior Member, warming up (<31 posts)
 
Join Date: Jan 2013
Location: Santa Fe NM
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
I'm going to try and convince my mechanic to not pull engine AND remove cylinder heads (sic - per BMW) in order to service the chain guides. I'm going to present him with the option of removing the front clip and doing the job on the lift with the engine in the car, with just removing the front engine covers, accessories, and VANOS units - not the heads. that's how I'd do it anyway. I've looked into the DIYs/stickies and my search doesn't pull anything up on that. Are there any links here or elsewhere to review on this? Also: what is the composition of the cylinder head gasket where it seals the lower and upper timing covers, e.g.: is it sturdy?
bikhe 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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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
DIY: Rod Bearing and Chain Guide Replacement jamiepeers E39 M5 and E52 Z8 Discussion 73 19th June 2017 11:12 PM
Chain guide replacement [Help Please] khizrs E39 M5 and E52 Z8 Discussion 32 15th February 2015 07:56 AM
timing chain replacement guide markus037 E39 M5 and E52 Z8 Discussion 4 10th June 2013 01:21 AM
DIY: Timing Chain guide replacement - S62 vice M62TU? ME_264 E39 M5 and E52 Z8 Discussion 4 14th October 2012 01:47 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