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Old 05-03-2008, 01:59 PM   #1
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Post Serptine Belt

How do you take out the old serptine belt and put in the new serptine belt in a 1988 Ford F-150 xlt.....?????
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Old 05-03-2008, 02:45 PM   #2
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Welcome to the site!

The goal is to release the tension applied by the spring-loaded tensioner.

I use extended sockets placed on the bolts of the tensioner pulley and tensioner base, then use a crow-bar or the like to apply leverage to lift the pulley. Be sure to keep the lever as close to the pulley and base as possible, so the sockets won't slip off the bolts.

Take things slow and easy, keep fingers and other mashable body parts out of the way, and only release enough tension to slip the belt off the alternator pulley.

Before removing the belt, make sure you have the belt path committed to memory, sketched out on paper, or have located the routing diagram - typically stuck on the radiator structure support, but it may be long gone given the age of the truck.

Route the new belt around all the pulleys, with the exception of the tensioner. Apply just enough leverage to lift the pulley high enough to slip the belt under. Again, watch out for your fingers, should the lever slip.

Should be good-to-go.
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Old 05-03-2008, 04:05 PM   #3
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Default Serpentine belt

When changing a fan belt, it is a good idea, if circumstances permit,
to inspect each pulley and make sure there is no build up of any string
or similar crud.

Check each and every pulley to verify that it is rotating without any
heavy drag.

Make sure that all the pulleys are in line and that the idler pulley is not
moving out of alignment.

This is just little stuff but it can save problems.

Ken H.
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Old 05-03-2008, 05:49 PM   #4
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this is the belt routing diagram for the 5.0 and 5.8L engines.
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Last edited by transmaster; 07-09-2008 at 06:09 PM.
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Old 05-03-2008, 05:54 PM   #5
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This is the routing diagram for the 4.9L 6
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Last edited by transmaster; 07-09-2008 at 06:09 PM.
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Old 06-07-2009, 02:46 PM   #6
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Default Belt routing diagram for 4.9L 6 cyl.

Quote:
Originally Posted by transmaster View Post
This is the routing diagram for the 4.9L 6

Do you have a link to this diagram or can you tell me where to find it. Chiltons and Haynes don't include it. The sticker is gone from under the hood and dad can't remember how he took them off.
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Old 06-07-2009, 11:52 PM   #7
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Click the image to open in full size.
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Old 06-08-2009, 06:37 PM   #8
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Quote:
Originally Posted by KAH View Post
When changing a fan belt, it is a good idea, if circumstances permit,
to inspect each pulley and make sure there is no build up of any string
or similar crud.

Check each and every pulley to verify that it is rotating without any
heavy drag.

Make sure that all the pulleys are in line and that the idler pulley is not
moving out of alignment.

This is just little stuff but it can save problems.

Ken H.
Did this with mine when I changed my belt. My tensioner pulley wouldn't even move. Bearing was shot. Half the pulley was polished so good from the belt that I could see myself in its reflection. Definitely a good thing to check. Also, diagrams are important, more important than I thought. I routed the belt how I "thought" it should go. Double checked that all the rib/flat sides lined up on the pulleys and everything. Then, I tried putting the belt on the last pulley for about 30 minutes without success. Finally I looked at the diagram one more time and it went on in two minutes. Felt like such a moron.

Live and learn the hard way or just read the directions
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Old 06-10-2009, 12:07 AM   #9
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Sometimes, this general rule might be of some help:

If the outer edge of the pulley is:

Tapered inward -- The belt goes on with the flat side out.

Flat outer edge -- The pulley rides on it's flat side in.

There should be a better way of wording this but it escapes me at the moment.

Ken H.
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