Chasing down a really annoying squealing belt! - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> General Rodding Tech
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-13-2010, 10:40 AM
killerformula's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Carburetor
Last journal entry: Clean up
Last photo:
Join Date: Oct 2003
Location: Northeast
Age: 34
Posts: 3,485
Wiki Edits: 3

Thanks: 13
Thanked 27 Times in 18 Posts
Chasing down a really annoying squealing belt!

So a friend of mine has a chevy truck with AC, Power steering and an air pump with serpentine belt setup. 88 350. Belt tensioner is new as is the belt, but the previous owner was trying to quiet the thing by spraying lube on it. I assume he probably changed the thing in the first place because it was making noise and it didn't help, so I'm not sure the lube is the issue, also considering its been a few thousand miles since it was last applied.

Anyhow, I'm reasonably sure there's some kind of alignment issue but nothing is obvious to the eye. I know when we squirt water on the belt it will shut up for a few revolutions so I'm pretty sure its the belt rubbing against a pulley somehow. Wear pattern isn't obvious.

What I really need to be able to do is isolate pulleys individually. Can the pulleys themselves be soaped? I was also thinking you could temporarily apply some kind of tape to each pulley and run it for a few revolutions to see if the tone changes. What do you guys think? How can this be traced?

K

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-13-2010, 01:59 PM
Registered User
 
Join Date: Feb 2010
Location: Newberg, OR
Posts: 4
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Serpentine belts are very susceptible to noise caused from any type of contamination including belt dressings sold in your local parts store. Even water/mud contamination from four wheel drives & from front wheel drive cars that have opposed mounted engines are common problems I see regularly. My best advise is to purchase a new belt & a couple cans of spray brake cleaner. Start by removing the old belt/belts being sure to note their routing pattern. Then THOROUGHLY clean each pulley with the spray brake cleaner. You should be able to rotate all of the pulleys except for the crankshaft to clean each one all of the way around. Use clean old t-shirts to wipe off any excess goo or whatever. Repeat the process as many times as you think you need to, to make then clean. Then install the new belts or belts & give it a try. Also note that serpentine belts need to be adjusted tighter than v-type belts. So if the truck has an automatic tensioner you will be ok providing that the belt is the correct length in the first place & since you said the tensioner was newer. If it has a manual tensioner you will need to make sure you get it good & tight so that your deflection is within probably about 1/2" using 30-40 pounds of force on a 10 inch run of belt. Give this a try & please let me know how the end result turns out!
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-13-2010, 06:40 PM
T-bucket23's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Engine basic condition - how to check Last photo:
Join Date: Aug 2005
Location: Massachusetts
Age: 57
Posts: 5,182
Wiki Edits: 26

Thanks: 7
Thanked 111 Times in 96 Posts
Good information in the previous post. You need to get any type of "lube" off the belt and pulleys. We usually wash them with soap and water, something that will cut grease and replace the belt. Also once the belt is installed check the marks on the tensioner, there are usually 2 on the stationery part and one on the movable part. The one on the movable part needs to be between the 2 on the stationery part. Also if it was a cheap, no name tensioner, throw it away and get a Gates or an OEM unit
__________________
Artificial Intelligence is no match for Natural Stupidity



Chet
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-14-2010, 10:33 AM
Rickracer's Avatar
ASE Master Tech, Fabricator
 
Last wiki edit: Taurus 2-speed fan control wiring diagram Last photo:
Join Date: Jan 2010
Location: Kissimmee, Florida
Age: 55
Posts: 937
Wiki Edits: 8

Thanks: 0
Thanked 3 Times in 3 Posts
If the belt and pulleys aren't all gooped up with belt dressing, sometimes regular old Crest toothpaste will polish everything up enough to make the noise go away. Just smear an amount about the same as what you normally use on your toothbrush on each side of the belt, and start it up. It will sound like hell to begin with, but should quieten down within a few minutes. May sound crazy, but it's worked for me and a bunch of other folks many times. If they are all gooped up, they need to be thoroughly cleaned, either with a strong alkaline cleaner or brakleen, whichever seems to do a better job.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-15-2010, 11:15 PM
Registered User
 
Last photo:
Join Date: Nov 2009
Location: no longer here
Posts: 293
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
my kids did this after he puked the radiator , a new belt didn't help , I finally had to spray brakekleen into the belt and then use some baking soda ( applied while the motor was running ) to help polish things up alittle then we tried the new belt and all was good !
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-17-2010, 11:49 AM
Kevin45's Avatar
Just one of the guys
 

Last journal entry: Garage Toys
Last photo:
Join Date: Jul 2002
Location: Urbana, Ohio
Age: 58
Posts: 3,058
Wiki Edits: 0

Thanks: 1
Thanked 15 Times in 15 Posts
Take the belt off and turn it around. (back to the front) Also while the belt is off check the belt tensioner to see if it spin freely or if it is bound up. Then try some spray lube on the backside of the tensioner.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 02-17-2010, 12:39 PM
Registered User
 

Last journal entry: 50 Ply wagon
Last photo:
Join Date: Oct 2008
Location: Pottstown,Pa
Posts: 632
Wiki Edits: 0

Thanks: 0
Thanked 31 Times in 30 Posts
Something alot of guys miss is that it may not be the belts.........it could possibly be the belt tensioner wheel. ..if the bearings get dry, spray some silicone with a long nozzle as not to get it on the belts into the bearing where its bolted. ..........been there, done that
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 02-20-2010, 02:48 PM
MI2600's Avatar
Member# 3287
 

Last journal entry: Vortec Heads
Last photo:
Join Date: Jul 2002
Location: N. Muskegon, MI
Posts: 2,632
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
My wife's car did this and I tried everything including changing the water pump. I finally stopped it by VERY carefully using a brass brush (toothbrush size) lightly on the belt as it was running.

Caution: Wear a hard hat, goggles, face mask, chest protector, gloves and steel-toed shoes!! LOL
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 02-23-2010, 11:31 PM
Registered User
 
Last photo:
Join Date: Nov 2009
Location: no longer here
Posts: 293
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by sunsetdart
Something alot of guys miss is that it may not be the belts.........it could possibly be the belt tensioner wheel. ..if the bearings get dry, spray some silicone with a long nozzle as not to get it on the belts into the bearing where its bolted. ..........been there, done that

wifes explorer just did this tonight one loud squeal and the belt poped of as the tensioner desinagrated ,bearing in it locked up solid , offto napa I go in the morning .
Reply With Quote Quick reply to this message

Recent General Rodding Tech posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

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

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Gilmer Belt Throwing! 454headache Hotrodding Basics 17 05-25-2010 06:48 PM
Nissan Altima GXE belt tensions... awbazar Engine 2 02-12-2010 08:37 AM
Deep 2 groove short W/P pulley or serpentine? fastrehotrods Engine 19 01-27-2009 01:50 PM
Belt Keeps Flying Off at High RPM - Why? leejoy Engine 67 02-20-2008 11:12 PM
Squeeling Fan Belt - Out of true Pulley Billy Boy Engine 3 02-15-2005 06:51 PM


All times are GMT -6. The time now is 05:35 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.