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

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 04-09-2014, 10:44 PM   #1
XxJeffxX
Registered User
 
Join Date: Jan 2014
Location: Hayward
Posts: 34
My Ride: 2002 330ci
Squeal on cold start, and 1500 RPM, New Pulleys and Belt!

Alright guys now I know what you'll say, use the search function and i've been doing this the past few days with no answers to my problem. So i recently did the whole cooling system and changed out my belts and pulleys since i was there, after a few days of no noises a loud annoying squealing sound started on cold start up and lasted until engine was fully warm, however it would still slightly squeal under acceleration. I've taken all the belts off and inspected all the pulleys i installed about 4 times, and even tried a little silicon spray in the pulleys(i know its a closed system but i'm desperate). I even took off both belts and washed them down with soap and water thinking it was slipping but the noise is still there So as of now i'm stumped guys, i changed all the pulleys, which include the idler pulley, alternator deflection pulley, and AC tensioner pulley, and replaced the belts, but still have that squeal. Any insight on what might be happening? i'm starting to think that the meyle deflection pulley i got was defective because it appears to be coming from that area.
XxJeffxX is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 04-09-2014, 11:51 PM   #2
XxJeffxX
Registered User
 
Join Date: Jan 2014
Location: Hayward
Posts: 34
My Ride: 2002 330ci
Quote:
Originally Posted by lszlszx View Post
Could be something else like water pump, alternator, or power steering.
Just changed the water pump for alternator it doesn't sound like it could be it, when i rotated it with the belts off it had no noise to it.
XxJeffxX is offline   Reply With Quote
Old 04-10-2014, 12:32 AM   #3
lszlszx
Registered User
 
Join Date: Jan 2013
Location: Socal
Posts: 4,685
My Ride: 328i, XC70
Give it some time.
It may get better, or worse, in which case it'll be easier to tell where the squeal is coming from.
__________________
lszlszx is online now   Reply With Quote
Old 04-10-2014, 12:41 AM   #4
Cbibbss
Registered User
 
Join Date: Jan 2014
Location: Ohio
Posts: 29
My Ride: 2003 325i
I had same problem. Make sure you replace with OEM parts. It squealed and didn't stop until I replaced pulleys and tensioner because they were poorly made (duralast from autozone). Don't BS on parts! Trust me!


Sent from BimmerApp mobile app
Cbibbss is offline   Reply With Quote
Old 04-10-2014, 11:24 AM   #5
LeoArellano
Registered User
 
Join Date: Dec 2013
Location: Virginia
Posts: 2
My Ride: 2001 330xi
The new belt might be a tiny bit longer. I had the same problem, replaced my belts and pulleys, I was hearing a squeal while driving turned out the new belt was longer by like a couple cm. I put the old one back one and the noise went away.

Last edited by LeoArellano; 04-10-2014 at 11:24 AM.
LeoArellano is offline   Reply With Quote
Old 04-10-2014, 05:28 PM   #6
marblesmike
Registered User
 
Join Date: Oct 2013
Location: NJ, USA
Posts: 165
My Ride: 2002 325ci
I have the exact same issue after doing all the same work. I got a stethoscope and had my buddy listen while I pressed on the gas....sound pinpointed to the alternator. Maybe spilling coolant and some getting into the alt is the cause. Anyways, I'm going to wait until it gets louder and more annoying before changing the alt. Remanufactured ones can be found on Amazon for ~$160 or around the same price from Advance Auto with online coupons.

As for the OP not thinking it's his alternator, there are internal components that can make that squeal noise. How do I know? I sprayed a bit of WD40 into the alt and the sound temporarily went away.

Last edited by marblesmike; 04-10-2014 at 05:29 PM.
marblesmike is offline   Reply With Quote
Old 04-10-2014, 11:32 PM   #7
XxJeffxX
Registered User
 
Join Date: Jan 2014
Location: Hayward
Posts: 34
My Ride: 2002 330ci
Quote:
Originally Posted by Cbibbss View Post
I had same problem. Make sure you replace with OEM parts. It squealed and didn't stop until I replaced pulleys and tensioner because they were poorly made (duralast from autozone). Don't BS on parts! Trust me!


Sent from BimmerApp mobile app
I used meyle pulleys and continental belts, i'm considering getting oem though since the sound hasn't really changed
XxJeffxX is offline   Reply With Quote
Old 04-10-2014, 11:33 PM   #8
XxJeffxX
Registered User
 
Join Date: Jan 2014
Location: Hayward
Posts: 34
My Ride: 2002 330ci
Quote:
Originally Posted by LeoArellano View Post
The new belt might be a tiny bit longer. I had the same problem, replaced my belts and pulleys, I was hearing a squeal while driving turned out the new belt was longer by like a couple cm. I put the old one back one and the noise went away.
I asked what the length was for OEM from the dealer and the one i got is the correct one, thanks though!
XxJeffxX is offline   Reply With Quote
Old 04-10-2014, 11:34 PM   #9
XxJeffxX
Registered User
 
Join Date: Jan 2014
Location: Hayward
Posts: 34
My Ride: 2002 330ci
Quote:
Originally Posted by marblesmike View Post
I have the exact same issue after doing all the same work. I got a stethoscope and had my buddy listen while I pressed on the gas....sound pinpointed to the alternator. Maybe spilling coolant and some getting into the alt is the cause. Anyways, I'm going to wait until it gets louder and more annoying before changing the alt. Remanufactured ones can be found on Amazon for ~$160 or around the same price from Advance Auto with online coupons.

As for the OP not thinking it's his alternator, there are internal components that can make that squeal noise. How do I know? I sprayed a bit of WD40 into the alt and the sound temporarily went away.
Do you suggest i do these to the individual pulleys to see where the noise is coming from?
XxJeffxX is offline   Reply With Quote
Old 04-11-2014, 05:37 AM   #10
David McMahon
Registered User
 
Join Date: Feb 2013
Location: Suffolk, UK
Posts: 1,421
My Ride: 15/Dec/98 E46 328i
Not sure if it even applies, but I've just had to change the crank pulley on my Peugeot 206 to stop it eating belts, much quieter now.
__________________
David McMahon is offline   Reply With Quote
Old 04-11-2014, 09:06 AM   #11
marblesmike
Registered User
 
Join Date: Oct 2013
Location: NJ, USA
Posts: 165
My Ride: 2002 325ci
Quote:
Originally Posted by XxJeffxX View Post
Do you suggest i do these to the individual pulleys to see where the noise is coming from?
I suggest you get a cheap mechanics stethoscope and listen to each component that could be making the noise.
marblesmike is offline   Reply With Quote
Old 04-11-2014, 10:37 AM   #12
XxJeffxX
Registered User
 
Join Date: Jan 2014
Location: Hayward
Posts: 34
My Ride: 2002 330ci
Quote:
Originally Posted by marblesmike View Post
I suggest you get a cheap mechanics stethoscope and listen to each component that could be making the noise.
Ok i'll definitely try that, thanks,
XxJeffxX is offline   Reply With Quote
Old 04-11-2014, 11:55 AM   #13
LeMansteve
Registered User
 
Join Date: Nov 2008
Location: USA - GA
Posts: 1,756
My Ride: '04 330i 6mt ZSP ZPP
When you say you replaced your pulleys, which ones did you replace? I assume the idler pulley and two tensioner pulleys.

Keep in mind there are some pulleys that can be replaced independently of the bearings they ride on, such as the water pump pulley and power steering pump pulley. IIRC, the alternator pulley can also be replaced independently of the alternator bearings. If you've replaced any of these pulleys and the noise still exists, then the bearings are probably going bad.
__________________
BMW CCA member - Peachtree Chapter
LeMansteve is offline   Reply With Quote
Old 04-11-2014, 08:03 PM   #14
XxJeffxX
Registered User
 
Join Date: Jan 2014
Location: Hayward
Posts: 34
My Ride: 2002 330ci
alright guy i'm pretty sure i pinpointed the problem, its the alternator deflection pulley, i used a stethoscope to track down the noise and sprayed some silicon lubricant on the pulley to see if the noise would go away, low and behold it was that new pulley i had just replaced, so i'm guess it was a defective part, so i'm going to go ahead and order an OEM pulley next week, i'll keep you guys updated but i'd like to thank all of you that answered, and helped me out with this problem, you guys are great! and the only reason i love the bmw community and no one else!
XxJeffxX 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 On
Censor is ON





All times are GMT -5. The time now is 07:31 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use