Serpentine belt squeaks at startup. Saginaw, 3G alt... Hate to do this - Page 2 - Ford Bronco Forum
 13Likes
Reply
 
LinkBack Thread Tools Display Modes
post #21 of 35 (permalink) Old 03-17-2017, 02:07 PM
Thread Killa
 
jowens1126's Avatar
 
Join Date: Jan 2011
Location: Orlando, FL
Posts: 8,611
Bronco Info: 1994 Bronco Eddie Bauer edition, 302 MAF, E4OD
iTrader: (2)
When I did my sag swap, i had a bad chirp. It sounded like a bearing going out. In fact I determined that it was the pulley not being on far enough. It was actually pulling on the crank making it ride on the thrust bearing. Once I corrected the depth of the pulley everything was fine.

Also as for belts, in my experience, a 5.0 can get by with the OEM length belt after a sag swap, but a 351 will need a belt that is 1/2 - 1" longer.

Heres where my pulley ended up on the shaft after it was set right.
jtetterton likes this.

1994 EB Bronco, 302 MAF, E4OD, BW1356, Slightly Customized Interior
"Demanding something free on top of a discount is just being a Democrat. - Steve83"

My Build Thread - http://www.fullsizebronco.com/forum/...d.php?t=191067
jowens1126 is offline  
Sponsored Links
Advertisement
 
post #22 of 35 (permalink) Old 03-17-2017, 02:09 PM
Fullsize Member
 
Join Date: Feb 2016
Location: Culpeper, VA
Posts: 266
Bronco Info: `94 XLT 5.8L
iTrader: (0)
Garage
Quote:
Originally Posted by jowens1126 View Post
When I did my sag swap, i had a bad chirp. It sounded like a bearing going out. In fact I determined that it was the pulley not being on far enough. It was actually pulling on the crank making it ride on the thrust bearing. Once I corrected the depth of the pulley everything was fine.



Also as for belts, in my experience, a 5.0 can get by with the OEM length belt after a sag swap, but a 351 will need a belt that is 1/2 - 1" longer.



Heres where my pulley ended up on the shaft after it was set right.



So a pulley remover is needed to adjust the depth of the ps pump pulley I assume?


Sent from my iPhone using Tapatalk

1988 Bronco XLT 5.0L
1994 Bronco XLT 5.8L
jtetterton is online now  
post #23 of 35 (permalink) Old 03-17-2017, 02:36 PM
FSM Lifetime
 
445 FE Bronco's Avatar
 
Join Date: Oct 2015
Location: In a foggy zone somewhere
Posts: 6,113
Bronco Info: 1978 Round headlight, 351M,C6, 9", 44/1991, 445 FE, t19, 205, Dana 60/70, MAF, Moet's
iTrader: (0)
Garage
If a new tensioner don't do it a slightly lager pulley will but it will slow down the alternator slightly.
445 FE Bronco is offline  
 
post #24 of 35 (permalink) Old 03-17-2017, 09:41 PM
Thread Killa
 
jowens1126's Avatar
 
Join Date: Jan 2011
Location: Orlando, FL
Posts: 8,611
Bronco Info: 1994 Bronco Eddie Bauer edition, 302 MAF, E4OD
iTrader: (2)
yea you need a pulley remover kit to adjust the pulley. every parts store has them cheap.

1994 EB Bronco, 302 MAF, E4OD, BW1356, Slightly Customized Interior
"Demanding something free on top of a discount is just being a Democrat. - Steve83"

My Build Thread - http://www.fullsizebronco.com/forum/...d.php?t=191067
jowens1126 is offline  
post #25 of 35 (permalink) Old 03-20-2017, 03:09 PM
Registered User
 
352Ford's Avatar
 
Join Date: Feb 2017
Location: Washington
Posts: 9
Bronco Info: 1996 XL
iTrader: (0)
Are you sure it's the belt slipping/squeaking and not a bearing going out in a pulley, alternator, water pump, etc.?

Shake everything down and spin them with the belt off see if anything is amiss.

I love projects, I have ruined my life with them.
352Ford is offline  
post #26 of 35 (permalink) Old 03-20-2017, 03:31 PM Thread Starter
Fullsize Member
 
B-man's Avatar
 
Join Date: Dec 2003
Location: Stuck in CALI... SUCKS
Posts: 6,746
Bronco Info: 1992 XLT , 5.8, E40D
iTrader: (1)
Garage
It was the tensioner. I replaced Friday. Drove it all weekend. No squeaks. Looks like the belt I have on is a goodin too. Got power and the rig is driving well.



Shit.... Why'd I say that... lol
dash_cam and storminc like this.

1992 XLT, 5.8 w/ E40D transmission, TTB D44 in front, 8.8 rear, 4.88 gears w/ Eaton Posi, Gibson exhaust/headers,cb radio, 4" suspension lift, 33x12.5's on 8" Pro Comp wheels.

http://www.supermotors.net/registry/27670/85749
B-man is offline  
post #27 of 35 (permalink) Old 03-20-2017, 06:40 PM
Registered User
 
dash_cam's Avatar
 
Join Date: Nov 2014
Location: dallas tx
Posts: 1,202
Bronco Info: 1996 EB, 351w, basically stock. 1981 custom 351m, long gone.
iTrader: (1)
Garage
Quote:
Originally Posted by B-man View Post
. Got power and the rig is driving well.



Attached Thumbnails
Click image for larger version

Name:	1ls03w.jpg
Views:	58
Size:	31.6 KB
ID:	98986  
B-man and jtetterton like this.

it's fun to do bad things

my "build" thread
dash_cam is offline  
post #28 of 35 (permalink) Old 03-20-2017, 07:42 PM
Fullsize Member
 
Join Date: Feb 2016
Location: Culpeper, VA
Posts: 266
Bronco Info: `94 XLT 5.8L
iTrader: (0)
Garage
I happened to notice the other that that the tensioner was bouncing a little. It's a new ford part. Does this mean the belt is too loose? I'll try and grab a video if I can.


Sent from my iPhone using Tapatalk

1988 Bronco XLT 5.0L
1994 Bronco XLT 5.8L
jtetterton is online now  
post #29 of 35 (permalink) Old Yesterday, 03:50 AM
Registered User
 
Join Date: Mar 2016
Location: Texas
Posts: 466
Bronco Info: 1989 Bronco 5.0 AOD w/ 3G alt, more to come
iTrader: (0)
Quote:
Originally Posted by jtetterton View Post
I happened to notice the other that that the tensioner was bouncing a little. It's a new ford part. Does this mean the belt is too loose? I'll try and grab a video if I can.


Sent from my iPhone using Tapatalk
No, the spring loaded tensioner is supposed to move a bit on a serpentine drive belt system. This is what the dual pulley SuperDuty tensioner, which is even more stable, does at idle with a brand new to-spec belt, rotating pulleys, etc., just as an example.

Spktyr is offline  
post #30 of 35 (permalink) Old Yesterday, 07:33 AM
Fullsize Member
 
Join Date: Feb 2016
Location: Culpeper, VA
Posts: 266
Bronco Info: `94 XLT 5.8L
iTrader: (0)
Garage
Quote:
Originally Posted by Spktyr View Post
No, the spring loaded tensioner is supposed to move a bit on a serpentine drive belt system. This is what the dual pulley SuperDuty tensioner, which is even more stable, does at idle with a brand new to-spec belt, rotating pulleys, etc., just as an example.

https://www.youtube.com/watch?v=LEdxZiz2KOQ


Ok that seems to be about what mine is doing. Mine might be slightly more exaggerated.


Sent from my iPhone using Tapatalk

1988 Bronco XLT 5.0L
1994 Bronco XLT 5.8L
jtetterton is online now  
post #31 of 35 (permalink) Old Yesterday, 03:20 PM
Registered User
 
Join Date: Mar 2016
Location: Texas
Posts: 466
Bronco Info: 1989 Bronco 5.0 AOD w/ 3G alt, more to come
iTrader: (0)
Quote:
Originally Posted by jtetterton View Post
Ok that seems to be about what mine is doing. Mine might be slightly more exaggerated.


Sent from my iPhone using Tapatalk
It would be more 'active' on a single pulley tensioner like the early PowerStroke 7.3 or the Windsor motors (and the 4.6 Mod motors) have. It's a common retrofit to the 9th gen PowerStroke 7.3 trucks to modify the bracket and fit the later SuperDuty's dual pulley tensioner - the stock single pulley tensioner is problematic on those engines. Likes to pitch belts. The dual pulley system is a lot more stable and stops the belt pitching.

What you see is normal, provided you have a new specced belt and the tensioner is new or recent and showing it is in the appropriate range of travel (see markings on tensioner).
jtetterton likes this.
Spktyr is offline  
post #32 of 35 (permalink) Old Yesterday, 06:29 PM
Fullsize Member
 
Join Date: Feb 2016
Location: Culpeper, VA
Posts: 266
Bronco Info: `94 XLT 5.8L
iTrader: (0)
Garage
Quote:
Originally Posted by Spktyr View Post
It would be more 'active' on a single pulley tensioner like the early PowerStroke 7.3 or the Windsor motors (and the 4.6 Mod motors) have. It's a common retrofit to the 9th gen PowerStroke 7.3 trucks to modify the bracket and fit the later SuperDuty's dual pulley tensioner - the stock single pulley tensioner is problematic on those engines. Likes to pitch belts. The dual pulley system is a lot more stable and stops the belt pitching.

What you see is normal, provided you have a new specced belt and the tensioner is new or recent and showing it is in the appropriate range of travel (see markings on tensioner).


Maybe I'm crazy but I don't see any range marking on the tensioner. It's a brand new motorcraft part.



Sent from my iPhone using Tapatalk

1988 Bronco XLT 5.0L
1994 Bronco XLT 5.8L
jtetterton is online now  
post #33 of 35 (permalink) Old Yesterday, 10:07 PM
Registered User
 
Join Date: Mar 2016
Location: Texas
Posts: 466
Bronco Info: 1989 Bronco 5.0 AOD w/ 3G alt, more to come
iTrader: (0)
Quote:
Originally Posted by jtetterton View Post
Maybe I'm crazy but I don't see any range marking on the tensioner. It's a brand new motorcraft part.



Sent from my iPhone using Tapatalk
It's visible in the original poster's picture. There's a pointer cast on the silver rim and a range scale stamped into the black rotating part.


Link for higher res: http://i.ebayimg.com/images/i/321909...-1/s-l1000.jpg
Spktyr is offline  
post #34 of 35 (permalink) Old Yesterday, 11:35 PM
Fullsize Member
 
Join Date: Feb 2016
Location: Culpeper, VA
Posts: 266
Bronco Info: `94 XLT 5.8L
iTrader: (0)
Garage
This is what mine looks like




Sent from my iPhone using Tapatalk

1988 Bronco XLT 5.0L
1994 Bronco XLT 5.8L
jtetterton is online now  
post #35 of 35 (permalink) Old Today, 12:01 AM
Registered User
 
Join Date: Mar 2016
Location: Texas
Posts: 466
Bronco Info: 1989 Bronco 5.0 AOD w/ 3G alt, more to come
iTrader: (0)
Quote:
Originally Posted by jtetterton View Post
This is what mine looks like




Sent from my iPhone using Tapatalk
Can't help you there, I don't know that one - but it should still have some sort of indicator to tell you when to replace the belt if nothing else. Maybe the position of the spring in the carved out section?
jtetterton likes this.
Spktyr is offline  
Reply

  Ford Bronco Forum > Bronco Discussions > 1980-'96 Bronco Tech

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Bronco Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
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. DO NOT USE Gmail.com accounts. If you only have a Gmail.com email please contact the administrator here

Email Address:
OR

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.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not 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

 
For the best viewing experience please update your browser to Google Chrome