S54 'rattle' at idle? - E46Fanatics E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 09-23-2019, 01:37 PM   #1
M_Dennis87
Registered User
 
Join Date: Sep 2019
Posts: 4
S54 'rattle' at idle?

I have a 2001 BMW Z3M Roadster that I've been chasing this 'rattle' noise to no avail. I thought the noise was related to the fan clutch which I just replaced this past weekend, but that didn't do it. It only occurs at idle and disappears when the engine is revved up a bit. There's no loss of power, rough idle, or CEL associated with it at all.

Just a bit of background, I purchased the car about a year ago from the original owner with just over 98k miles and the car currently has just under 100k miles. Since taking ownership, I've had all of the fluids changed, spark plugs / coils, valve adjustment / gaskets, power steering pump replaced, and fan clutch.

My only other thoughts are it could be related to the Vanos or the idler pulley / tensioner (both of which haven't been touched by the original owner) or I simply have something wobbling around in the engine bay that I can't see. I haven't been able to find a video of an S54 making a similar noise, but below is a video of my car running. I was really hoping to take the car on a road trip this weekend, but now I'm not so sure...

M_Dennis87 is offline   Reply With Quote
Old 09-23-2019, 07:16 PM   #2
M_Dennis87
Registered User
 
Join Date: Sep 2019
Posts: 4
Here's another video of revving the motor up a bit. As mentioned, the noise goes away when the engine is revved. It also sounds like it might be coming from the air plenum or the fuel rail. Not sure if it could possibly be a bad injector?

M_Dennis87 is offline   Reply With Quote
Old 10-18-2019, 03:13 PM   #3
Zirbo
Registered User
 
Join Date: Dec 2013
Location: Pennsylvania
Posts: 2
My Ride: 325xIT
Year: 2005
Model: 3255XiT
Transmission: AT
There are several causes for rattle. (search this forum.) Could be a VANOS rattle.
Zirbo is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-17-2020, 05:45 PM   #4
camdenthrasher
Registered User
 
Join Date: Jan 2016
Location: Washington
Posts: 1
My Ride: 04 m3
Did you ever figure this out or replace anything? I know it's kind of hard to hear in the video, but this is the EXACT same noise my engine is making at idle and it also disappears after idle as well.
camdenthrasher is offline   Reply With Quote
Old 01-17-2020, 09:22 PM   #5
M_Dennis87
Registered User
 
Join Date: Sep 2019
Posts: 4
Quote:
Originally Posted by camdenthrasher View Post
Did you ever figure this out or replace anything? I know it's kind of hard to hear in the video, but this is the EXACT same noise my engine is making at idle and it also disappears after idle as well.
So I didn't end up replacing anything but actually was forced to daily the car for a couple months and the noise simply went away. Not sure if it could have been related to not driving the car enough (I was only driving it a couple days a month) but the noise is completely gone. I will likely address the Vanos in the spring for piece of mind, but I don't think the noise was related.
M_Dennis87 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Censor is OFF



All times are GMT -5. The time now is 12:03 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
(c) 1999 - VerticalScope Inc. All rights reserved.