Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our 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 the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 06-15-2013, 08:50 PM
CoreLokt's Avatar
CoreLokt CoreLokt is offline
Junior User
 
Join Date: May 2012
Location: Goose Creek
Posts: 71
CoreLokt is starting off with a positive reputation.
Dustin Marchant CoreLokt
Serpentine Belt Problem?

Hey guys. I have been having issues with my serpentine belt jumping off of the tensioner pulley ever since I replaced the belt after I replaced the water pump. The old belt was getting pretty dry rotted so I went ahead and replaced it while I had everything off. The new belt squealed and I figured it was the tensioner pulley. I put a new pulley on and it still squealed however it jumped off a little and rode on the ridge of the pulley which then split the belt in half. I got another belt and gave it another try. This one didnt squeal but same thing happened. It jumped off and shredded to bits again. So i put the old pulley on and got another belt. This one doesnt squeal and it hasnt jumped off yet but I am concerned as it does ride really close to the edge of the pulley. It almost looks like the pulley's angle is off or something. The belt is more centered on the side that is closest to the power steering pump. The side towards the alternator is almost touching the edge. Any ideas on how to fix this? Would replacing the tensioner maybe solve the problem? I really have no idea on what to try next. Thanks.
__________________
1995 F150 XL 2WD
Rebuilt 300ci/4.9L Bored .30 Over
Rebuilt E4OD
32x11.50x15 Wild Country MTX's
2" BDS Leveling Coils
Skyjacker Hydro 7000 Shocks
Reply With Quote
  #2  
Old 06-15-2013, 09:27 PM
Encho's Avatar
Encho Encho is offline
The Brown Mod
 
Join Date: Dec 2004
Location: Caracas, Venezuela
Posts: 6,007
Encho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant future
Align all the pulleys, there are several methods to do that, including using washers, return the tensioner pulley and replace it again, check if the belt size is the one you should be using. With the belt off, turn each pulley, look for noises, vibrations, or stuck pulleys.
__________________
1993 Special Edition Bronco: 5.0lt V8, E4OD Auto, MM Supreme manual hub lockers and a sweet roof tent, ROTW in 2/9/09
My Write-ups: Ford Steering Box Rebuild / Ford Front End Rebuild and auto hubs replacement / Ford Rear Drum Brakes / Ford E4OD Cooler & Shift Kit mods, drain-refill procedures R.I.P. Steve, you will be deeply missed my friend
Reply With Quote
  #3  
Old 06-16-2013, 08:24 AM
DPDISXR4Ti DPDISXR4Ti is offline
Elder User
 
Join Date: Nov 2011
Location: New York
Posts: 944
DPDISXR4Ti is gaining momentum as a positive member of FTE.
For some reason the 4.9 seems to be more prone to this problem than most other engines. Dunno why exactly, but if everything is right there's not a problem, so something is indeed wrong on your engine. I think the biggest culprit may be the tensioner. Not so much the idler pulley (which you've apparently already replaced), but the tensioner itself. If it gets worn and twists just a bit, it's going to send the belt off at an angle.

The Motorcraft tensioner seems to be a much better unit than the after-market parts you'll get at most chain stores. It gets bonus points for having a 3/8" square fitting at the top, making it much easier to rotate with a 3/8" drive breaker bar or ratchet.

Replace the tensioner and I bet your problem goes away. So far that's fixed it for me.
__________________
Brad
Reply With Quote
  #4  
Old 06-16-2013, 04:26 PM
rikard rikard is offline
Posting Guru
 
Join Date: May 2007
Location: North Reading Mass
Posts: 1,183
rikard is gaining momentum as a positive member of FTE.
On my 4.9s I usually bite the bullet and buy the Goodyear belt and use a scotch pad or light sand paper to clean up the pulleys.
Regards
rikard
__________________
"Be who you are and say what you feel because those who mind don't matter
and those who matter don't mind."
- Dr. Seuss"
Nelly Belle 1995 Black F150 4x2 SC XLT 300 5 Spd 250k miles
Reply With Quote
  #5  
Old 06-21-2013, 05:06 PM
CoreLokt's Avatar
CoreLokt CoreLokt is offline
Junior User
 
Join Date: May 2012
Location: Goose Creek
Posts: 71
CoreLokt is starting off with a positive reputation.
Dustin Marchant CoreLokt
So I ordered a brand new entire tensioner assembly from Motorcraft and the belt is still riding off the side towards the engine. The pulleys appear to be lined up correctly. It has a brand new alternator and power steering pump which it is in between so I am lost
Reply With Quote
  #6  
Old 06-21-2013, 06:03 PM
Encho's Avatar
Encho Encho is offline
The Brown Mod
 
Join Date: Dec 2004
Location: Caracas, Venezuela
Posts: 6,007
Encho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant future
The belt is new, so it wasn't the cause. You replaced two parts, you should look at these two, you think they are aligned but I can bet you it's either the new alternator or the pump which are causing the problem. I would look specially hard at the steering pump pulley, it probably isn't all the way in.
__________________
1993 Special Edition Bronco: 5.0lt V8, E4OD Auto, MM Supreme manual hub lockers and a sweet roof tent, ROTW in 2/9/09
My Write-ups: Ford Steering Box Rebuild / Ford Front End Rebuild and auto hubs replacement / Ford Rear Drum Brakes / Ford E4OD Cooler & Shift Kit mods, drain-refill procedures R.I.P. Steve, you will be deeply missed my friend
Reply With Quote
  #7  
Old 06-21-2013, 09:32 PM
CoreLokt's Avatar
CoreLokt CoreLokt is offline
Junior User
 
Join Date: May 2012
Location: Goose Creek
Posts: 71
CoreLokt is starting off with a positive reputation.
Dustin Marchant CoreLokt
I pulled the power steering pulley out a little because of the side it slid off was the closest to the engine. It seemed to help some however the belt still rides close to the edge on the side that it enters the tensioner pulley from the alternator. There is a little bit of gap where it leaves towards the power steering pump like it should be. I have no idea how to get it lined up now. I dont see a way to adjust the alternator pulley
__________________
1995 F150 XL 2WD
Rebuilt 300ci/4.9L Bored .30 Over
Rebuilt E4OD
32x11.50x15 Wild Country MTX's
2" BDS Leveling Coils
Skyjacker Hydro 7000 Shocks
Reply With Quote
  #8  
Old 06-21-2013, 09:34 PM
CoreLokt's Avatar
CoreLokt CoreLokt is offline
Junior User
 
Join Date: May 2012
Location: Goose Creek
Posts: 71
CoreLokt is starting off with a positive reputation.
Dustin Marchant CoreLokt
Also I replaced those parts before I was having belt problems if that helps
__________________
1995 F150 XL 2WD
Rebuilt 300ci/4.9L Bored .30 Over
Rebuilt E4OD
32x11.50x15 Wild Country MTX's
2" BDS Leveling Coils
Skyjacker Hydro 7000 Shocks
Reply With Quote
  #9  
Old 06-21-2013, 10:35 PM
DPDISXR4Ti DPDISXR4Ti is offline
Elder User
 
Join Date: Nov 2011
Location: New York
Posts: 944
DPDISXR4Ti is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by CoreLokt View Post
So I ordered a brand new entire tensioner assembly from Motorcraft and the belt is still riding off the side towards the engine.
Sorry to hear that wasn't a solution. Now you've got me concerned that I may still have a problem given that your symptoms matched mine pretty much exactly.

Have you taken the tension off and made sure none of the pulleys have any play?
__________________
Brad
Reply With Quote
  #10  
Old 06-21-2013, 10:52 PM
CoreLokt's Avatar
CoreLokt CoreLokt is offline
Junior User
 
Join Date: May 2012
Location: Goose Creek
Posts: 71
CoreLokt is starting off with a positive reputation.
Dustin Marchant CoreLokt
Yeah I checked them all and they are all snug. The only thing I can think of is somehow the angle is off on the tensioner pulley being that the belt meets and leaves the pulley at an angle.
__________________
1995 F150 XL 2WD
Rebuilt 300ci/4.9L Bored .30 Over
Rebuilt E4OD
32x11.50x15 Wild Country MTX's
2" BDS Leveling Coils
Skyjacker Hydro 7000 Shocks
Reply With Quote
  #11  
Old 06-22-2013, 03:59 AM
timbersteel's Avatar
timbersteel timbersteel is offline
Posting Guru
 
Join Date: Mar 2005
Location: Mexico, Missouri
Posts: 2,265
timbersteel is gaining momentum as a positive member of FTE.timbersteel is gaining momentum as a positive member of FTE.
I just wanted to suggest an idea. I have no assumptions it has been suggested or tried. Find yourself or buy, a good straight piece of aluminum or steel. About 1/4" thick, 1" wide, 2 maybe 3 foot long. Use it as a straightedge to check against the crank/balancer and corresponding pulleys. I used this suggestion to align my alternator and power steering pulley when I had to replace both, with the power steering pulley being the culprit.

I also have seen this a problem with the 4.9 engines shredding belts or becoming mis-aligned and squealing. This idea may or may not help you. I hope it does though.
__________________
1992 F-150 I6 4.9L 300 110K 4x4, SuperCab, Manual
1992 F-150 V8 302 156K 4x4, SuperCab, Auto
"He's one brick shy of a load..."
"These ideas, evaluations, opinions are representations of real-life scenarios and backed by Murphy's Law..."
"Inferior parts lead to immediate failure sooner than later..."
Reply With Quote
  #12  
Old 06-22-2013, 09:22 AM
DPDISXR4Ti DPDISXR4Ti is offline
Elder User
 
Join Date: Nov 2011
Location: New York
Posts: 944
DPDISXR4Ti is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by CoreLokt View Post
The only thing I can think of is somehow the angle is off on the tensioner pulley being that the belt meets and leaves the pulley at an angle.
That was precisely my assumption as well, with the thinking that the tensioner was worn in some way and tweaking itself off-angle a bit, thus sending the belt off at the wrong angle towards the power steering pulley.

Does your idler pulley have the belt retainers so that the belt can't go beyond the surface of the pulley? I don't know if that really makes a difference, but mine does.

Given that you've replaced the tensioner with a new Motorcraft unit, I think we can rule that out and focus on the power steering pump. Assuming you've got the pulley installed all the way on the shaft, perhaps it might be worth shimming the pump inbound with some thin washers. The other thing to consider is re-seating the bolts for the bracket, making sure the assembly is being pushing towards the rear as the bolts are tightened. I don't recall if there's some play there.
__________________
Brad
Reply With Quote
  #13  
Old 06-22-2013, 10:11 AM
CoreLokt's Avatar
CoreLokt CoreLokt is offline
Junior User
 
Join Date: May 2012
Location: Goose Creek
Posts: 71
CoreLokt is starting off with a positive reputation.
Dustin Marchant CoreLokt
Ok since I adjusted the power steering pulley, the belt seems to have settled a little and now appears to have the necessary clearance on both sides now. It's not center of the pulley or anything but it does clear and hopefully it will settle on in. Thanks for all of y'all's help. If anything else happens ill keep ya updated
__________________
1995 F150 XL 2WD
Rebuilt 300ci/4.9L Bored .30 Over
Rebuilt E4OD
32x11.50x15 Wild Country MTX's
2" BDS Leveling Coils
Skyjacker Hydro 7000 Shocks
Reply With Quote
  #14  
Old 06-22-2013, 01:47 PM
Encho's Avatar
Encho Encho is offline
The Brown Mod
 
Join Date: Dec 2004
Location: Caracas, Venezuela
Posts: 6,007
Encho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant futureEncho has a brilliant future
Of course, when you modify something and a problem rises you always have to look first at the latest modifications you made. I'm glad it's working better.
__________________
1993 Special Edition Bronco: 5.0lt V8, E4OD Auto, MM Supreme manual hub lockers and a sweet roof tent, ROTW in 2/9/09
My Write-ups: Ford Steering Box Rebuild / Ford Front End Rebuild and auto hubs replacement / Ford Rear Drum Brakes / Ford E4OD Cooler & Shift Kit mods, drain-refill procedures R.I.P. Steve, you will be deeply missed my friend
Reply With Quote
Old 06-22-2013, 01:47 PM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
5.0 serpentine belt walking off crank pulley 73FOMO Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) 7 03-19-2014 06:08 PM
Belt squeal at a/c compressor dieselfumes12 Super Duty & Heavy Duty 3 12-18-2012 07:52 PM
Belt squealing ManfredVonRichtofen 1978 - 1996 Big Bronco 21 08-04-2012 08:37 PM
F150 belt issue greasemanicure 1987 - 1996 F150 & Larger F-Series Trucks 6 03-27-2012 10:03 PM
Serpentine Belts thrown constantly ready to trash the truck customx 1987 - 1996 F150 & Larger F-Series Trucks 15 01-18-2005 02:06 PM



All times are GMT -5. The time now is 07:13 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup