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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

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Old Jan 29, 2008 | 12:40 PM
  #1  
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ABFordF150
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problems

hey peoples. got a quick question for you. i own a 1991 ford f150, with the 302. theres a loud squeeling sound comming from the front of the motor, sounds like a bearing going. ive changed the water pump already and its still there. it sounds like its comming from the "air smog pump", ive been tol dthat its ok to bypass this pump by putting a smaller cerpentine belt on and taking the pulley off the pump, has anyone done this or attempted this and had luck?? im worried that it might disrupt something else that the pump relies on. also if you have, do you have a length of cerpentine belt that you used. thanks.
 
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Old Jan 29, 2008 | 12:45 PM
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Animalistic
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Check your belt tensioner as they are usually the first to go.
 
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Old Jan 29, 2008 | 12:46 PM
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Animalistic
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I forgot to add: Welcome to the site. You will find some very experienced help here.
 
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Old Jan 29, 2008 | 12:46 PM
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when i changed the water pump, i spun the tensioner and it sounded good, no sounds comming from it, and it felt good too, no play in the bearing.
 
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Old Jan 29, 2008 | 12:50 PM
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Check out this link for a search I ran:

https://www.ford-trucks.com/forums/s...earchid=277072

If you are going to bypass the pump, make sure you do not have to pass emisions.
 
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Old Jan 29, 2008 | 01:11 PM
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pc_2000
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Welcome to the site!
After I replace my waterpump I decided to put on a new serpentine belt. This was an Advanced Auto belt. It now squeals. I put the old one back on and it stopped. I've been told to go back to Ford and get an original, which I was planning to do. So check your belt, it may be as simple as that.
 
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Old Jan 29, 2008 | 01:54 PM
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yeah sometimes new belts will do that-something about air getting trapped between them and the pulleys-I like the old v belts-but then I'm old school
 
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Old Jan 29, 2008 | 06:14 PM
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i reused the old belt cuz i only had maybe 25000 kms on it. i measured around the pulleys with string and got 86 inches, so i talked to my parts guy and he said hes gonna send me and 86 +/- 3 inches both ways and just figure out which one will work best for me and to just send the rest back. stock belt length is 91 inches.
 
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Old Jan 30, 2008 | 07:06 PM
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I would like to extend a welcome to you also. I see you are in need of a belt for your truck and from the sounds of it you may need a 91 inch belt. We've got a few of them listed with the lengths if you would like to have a look.

http://www.rockauto.com/catalog/rafr...&parttype=8905

Hope it helps get your truck on the road again.

Faly
 
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Old Jan 30, 2008 | 07:14 PM
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Did you check the power steering pump? These can squeal like a banshee when they go bad.
 
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Old Jan 30, 2008 | 07:49 PM
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thanks, ill look into that too.
 
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