Question about 1990 Ford F150

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Belt slipping I have a 1990 ford f150 The serpentine belt keeps slipping off the top right wheel just enough that it makes a screeching sound ..What I do to correct that t/y

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  • Anonymous Mar 28, 2014

    I just replaced to serpentine belt and want to get rid of the screeching sound. How do I do it?



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  • Master
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If the belt keeps coming off the pulley you have an alignment problem. Check the idler pulley on the truck to see if it is loose or has a worn out bearing. You need to get the pulley that is crooked replaced or shimmed. Did you by chance change the water pump and now have the problem?

Posted on Feb 26, 2009


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1 Answer

Battery screetching when both cable connected

The loud screeching sound is from the serpentine belt slipping over the pulleys a little. You probably got some radiator coolant on the belt or pulleys when replacing the radiator. When you connect both battery cables the alternator is trying to charge which puts a load or drag on the alternator which causes the belt to slip over the pulley enough to cause the screeching. The only way to correct this is to take the belt back off and wash it with warm soapy water to remove the coolant contamination from the belt. Then scrub the pulleys also as coolant was transferred from one pulley to another by the serpentine belt. Then replace the belt and put a little comet cleanser onto the belt to extract a little more of the contamination from the belt and pulleys before you start it up. And last but not least make sure the belt has the correct tension so as to prevent it from slipping. If you wait to long the belt will always be contaminated and forever screech. Do not buy any belt dressing for the belt. That stuff is junk and makes the rubber in the belt soft and leads to a premature belt failure.

Apr 25, 2012 | 1997 Jeep Grand Cherokee

1 Answer

Serpentine belt 1990 ford f150

Find the spring loaded Tensioner pulley and use a wrench on the nut in the center of the pulley to pull the pulley away from the belt. Once you have released enough tension, you can slip the belt off of one of the other pulleys and gently release the Tensioner pulley. slip the belt off the rest of the pulleys and put the new belt in the same way the old one came out, pulling the tensioner pulley out and slipping the belt back under it, before gently releasing. Make a note beforehand of how the belt is installed to be sure you get it back in correctly. The grooves in the belt should go against the grooved pulleys and the flat side of the belt should go against the flat pulleys. This diagram may be helpful.

Nov 23, 2011 | 1990 Ford F150

1 Answer

My 99 explorer makes a screeching sound

Have your serpentine belt checked for normal wear and tear. When the belts get worn out, they can slip on the pulleys designed to move the belt and cause such a screeching sound. It's annoying and embarrassing all at the same time.

Sep 29, 2011 | 1999 Ford Explorer

1 Answer

Remove and replace alternator


Just follow these steps to remove and replace the alternator. You will need this tools, Serpentine belt tool, Battery wrench, Lug wrench, Floor jack, Jack stand, Socket set,

  1. Open the hood, locate the serpentine belt tensioner and move the tensioner off the
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    pulley with your other hand and then slowly move the tensioner back to its normal
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  2. Disconnect the negative battery cable from the battery with the battery wrench.
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  3. Turn the lug nuts on the right-front wheel counterclockwise until they're loose
    enough for hand removal, but leave them on for now.
  4. Lift the right-front end with the floor jack and support it on a jack stand placed
    underneath the right-front frame. Remove the lug nuts and right-front wheel by hand
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  5. Slip the serpentine belt off the alternator pulley by hand. You can access the
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    by hand and remove the ground strap with your socket set.
  6. Remove the alternator mounting bolts with your socket set. Lift the alternator out
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    how you removed the old one.
  7. Thread the alternator mounting bolt through the new alternator and into the
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  8. Attach the alternator ground strap with your socket set. Plug the alternator
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  9. Slip the serpentine belt over the new alternator pulley. Reinstall the wheel and
    lug nuts by hand. Lower the Taurus of the jack stand with the floor jack.
  10. Move the belt tensioner aside again and place the belt on the tensioner pulley with
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    its normal position. Reconnect the negative battery cable to the battery.
Hope this helps you.
Take care and good luck

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1 Answer

The belt is squealing like it's slipping, but appears to be tight, can it be too tight?

To tight should not cause squealing, if it is a serpentine belt check the splines on the inside if they come to a point or are sharp then the belt is wore out. They need to have a flat spot on each spline to keep it from slipping.Hope this helps.

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1 Answer

I cant get enough slack for my serpentine belt to slide back on 1999 ford f150

Utilize the Tensoner pulley (thats what its there fore) while making sure the rest of the belt is tight against the other pulleys. If its the same belt it should go back on. not sure about under the hood of a 99 F-150 off the top of my head but as far as i know thats usually the only way

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Needa serpentine belt routing diagram for a 1990 F150 pickup truck

1990 Ford F Series Pickup 6-Cyl. 4.9 L
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Is this engine is your model, I hope help you with this. Good luck.

Sep 11, 2009 | 1990 Ford F150

1 Answer

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theres a belt tensioner look 4 a pulley thats on the end of a arm or isnt a pump theres a nut on the outer part of the pulley use a wrench 2 move it back n forth wrap the belt around all pulleys save the tensioner 4 last and should slip rite on

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