Engine making loud noise, what is it? - BMW M5 Forum and M6 Forums

Go Back   BMW M5 Forum and M6 Forums > BMW M5, M5 Touring, M6 and Z8 Forums > E39 M5 and E52 Z8 Discussion

E39 M5 and E52 Z8 Discussion 1998-2003 Advertiser's Forum


Reply
 
LinkBack Thread Tools Rate Thread Display Modes
Old 25th September 2010, 20:28   #1
e39power
Member, Sport: Off DSC: On (>50 posts)
 
Join Date: Aug 2008
Location: CT

Garage: e39 M5

Sales Feedback: (2)

Thanks: 0
Thanked 3 Times in 3 Posts
Exclamation Engine making loud noise, what is it?

Looking for some help with engine noise. I originally thought the noise was VANOS related, see previous post VANOS rattle continues after startup, no codes, but it is so loud that I'm thinking it may be something worse like a broken chain guide or rod knocking. Would a sticking valve be loud? this is more than a slight ticking.

It seems to be coming from the top end on bank 2 and there are no codes. When I first start up the engine it will idle without the noise until I give it some gas, then the noise is constant even when going back to idle. So far I've checked the following:
-drained oil and checked filter, no debris
-removed chain tensioner, spring was not broken although it was not tapered on both ends like the one here Chain tensioner change DIY with pics
-removed bank2 valve cover, no scoring on the cam lobes, tensioner for the cam chain is tight. I did notice there is some play on the chain that runs back to bank1, right about where #4 is in this diagram - is this normal?
RealOEM.com BMW E39 M5 Timing - Timing Chain Lower P

Any other ideas while I have this opened up? I may just bring it to the dealer and see what they come up with

update: just noticed I can turn the little 10mm coupler on the vanos gear...dont think I should be able to? as I remember it connects to the vanos unit and should be tight? I can't get TIS to install on win7 which is unfortunately all I have right now. #2 in the diagram here for the exhaust cam, you can also just barely see in the pics below
RealOEM.com BMW E39 M5 timing gear timing chain top
Attached Thumbnails
Engine making loud noise, what is it?-engine-001b.jpg  

Engine making loud noise, what is it?-engine-002b.jpg  

Engine making loud noise, what is it?-engine-003b.jpg  

__________________
2002 M5 Lemans Blue

Last edited by e39power; 25th September 2010 at 21:45.
e39power is offline   Reply With Quote
Old 25th September 2010, 20:46   #2
mondeoman
Member, Sport: On DSC: Off
 
Join Date: Sep 2009
Location: UK Midlands

Garage: 2002 E29 M5 Sterling Silver

Sales Feedback: (0)

Thanks: 9
Thanked 53 Times in 39 Posts
OH

MY

GOD!

What a lovely clean engine!!

Sorry, no other comment than that at the mo
mondeoman is offline   Reply With Quote
Old 25th September 2010, 23:31   #3
blackxs
M5 Guru (>2000 posts)
 
blackxs's Avatar
 
Join Date: May 2009
Location: Phoenix AZ

Garage: Z3 M Coupe

Sales Feedback: (2)

Thanks: 646
Thanked 606 Times in 480 Posts
From the pictures I do not see anything noticeably wrong but with an engine that clean you should have a pretty easy time pinpointing the problem!

It could be a few things, of which you seem to know most of them. Run through the engine and visually confirm everything looks ok
__________________
Unterschrift
blackxs is offline   Reply With Quote
Old 25th September 2010, 23:48   #4
Cemessi
M5 Guru (>2000 posts)
 
Cemessi's Avatar
 
Join Date: May 2006
Location: South-East UK

Garage: No M5 at the moment

Sales Feedback: (0)

Thanks: 5
Thanked 279 Times in 188 Posts
Its alot cleaner than mine. Lower mileage I suspect.
Cemessi is offline   Reply With Quote
Old 26th September 2010, 00:24   #5
e39power
Member, Sport: Off DSC: On (>50 posts)
 
Join Date: Aug 2008
Location: CT

Garage: e39 M5

Sales Feedback: (2)

Thanks: 0
Thanked 3 Times in 3 Posts
saw a few posts about chain guides wearing/breaking on higher mileage, mine is only at 60k
Rattling noise at idle and engine shut off
scary engine sound

I'm really not sure what else to check, I dont want to tear down the whole engine to check the chain guides.

I think I'll take the other valve cover off and see if the vanos hex coupler turns there too. And take the lower oilpan off but then I'm out of ideas.


update: bank1 vanos coupler moves too, and the oilpan was spotless...guess I'll put it back together and see what the dealer says. maybe something just got stuck in the alternator

Last edited by e39power; 26th September 2010 at 04:31.
e39power is offline   Reply With Quote
Old 28th September 2010, 03:42   #6
e39power
Member, Sport: Off DSC: On (>50 posts)
 
Join Date: Aug 2008
Location: CT

Garage: e39 M5

Sales Feedback: (2)

Thanks: 0
Thanked 3 Times in 3 Posts
so I'm back to the VANOS theory again. I found this clip of youtube, not mine, but making the exact same noise. I don't think this is the "deisel noise" that is associated with VANOS?
YouTube - E39 BMW M5 Intermittent Rattle Clattering Noise !! Vanos ??
e39power is offline   Reply With Quote
Old 28th September 2010, 04:03   #7
pjfox23
Fellow Member (>400)
 
pjfox23's Avatar
 
Join Date: Feb 2009
Location: CT

Garage: 2008 M5 Space Gray

Sales Feedback: (2)

Thanks: 38
Thanked 69 Times in 49 Posts
Does the noise change pitch/intensity/sound if your give her some gas?
pjfox23 is offline   Reply With Quote
Old 28th September 2010, 12:09   #8
mondeoman
Member, Sport: On DSC: Off
 
Join Date: Sep 2009
Location: UK Midlands

Garage: 2002 E29 M5 Sterling Silver

Sales Feedback: (0)

Thanks: 9
Thanked 53 Times in 39 Posts
That little coupler should be free to rotate - it doesn't twist the adjusting cams, it just moves them in and out.
mondeoman is offline   Reply With Quote
Old 28th September 2010, 18:38   #9
e39power
Member, Sport: Off DSC: On (>50 posts)
 
Join Date: Aug 2008
Location: CT

Garage: e39 M5

Sales Feedback: (2)

Thanks: 0
Thanked 3 Times in 3 Posts
well this was one odd problem, very relieved it is over with. 1 of the 3 bolts of the p/s pump was just slightly loose and causing the rattle. don't know how I didn't see that earlier but at least I know the engine internals are in good order.
e39power is offline   Reply With Quote
Old 28th September 2010, 18:39   #10
Cemessi
M5 Guru (>2000 posts)
 
Cemessi's Avatar
 
Join Date: May 2006
Location: South-East UK

Garage: No M5 at the moment

Sales Feedback: (0)

Thanks: 5
Thanked 279 Times in 188 Posts
Glad you found it. I heard of oil pump bolts being loose on E36's I think. Makes you wonder...
Cemessi is offline   Reply With Quote
Reply

Bookmarks



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Help!!!!!Strange noise my M is making! Boosted1 E39 M5 and E52 Z8 Discussion 7 3rd March 2009 19:51
Engine making humming noise around 4k rpm.. Rambino E60 M5 and E61 M5 Touring Discussion 0 22nd January 2009 17:36
Loud Screaching Noise Finesta101 E39 M5 and E52 Z8 Discussion 9 4th January 2008 22:19
We are making noise... Danish E60 M5 and E61 M5 Touring Discussion 2 14th May 2002 02:13
Engine Making weird noise! ///MLOVER! E39 M5 and E52 Z8 Discussion 1 14th July 2001 19:17

Loading...

All times are GMT +2. The time now is 12:13.



Everything Copyright 2000-2008. Do not use ANYTHING from this site without written permission. All images, graphics, sound files, video files and text appearing on this web site are the exclusive property of m5board.com and are protected under international copyright laws. All images, graphics, sound files, video files and text on this site are for on-screen and on-site viewing and listening only. No part of this web site may be reproduced, copied, saved, stored, manipulated, or used in any form for personal or commercial purposes without the prior written permission of m5board.com. Use of any image or graphic as the basis for another photographic concept or illustration is a violation of the copyright. Any copyright infringement will be prosecuted to the full extent of federal and international copyright laws. M5board.com is an enthusiast board and we don't condone any dangerous activity. Our airfield events are completely safe based on years of experience, we conduct them during clear visibility with mature participants that have several years of experience with high-performance automobiles, large unobstructed run-off zones on sealed off private former military airbases and we clearly mark the braking zones. If inexperienced with high speed driving we do not recommend organizing your own event but attending a high-performance driving school. The use of the term "BMW" on this site is for reference only, and does not imply any connection between m5board.com and BMW AG or BMW North America.