squeeling under the hood
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HT4100 4.1, 4.5, 4.9 Discussion, squeeling under the hood in Cadillac Engine Technical Discussion; I just changed my belt due too the old one tearing apart. Now I have a squeeling noise coming form ...
  1. #1
    cadillaceldo93 is offline Cadillac Owners Member
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    squeeling under the hood

    I just changed my belt due too the old one tearing apart. Now I have a squeeling noise coming form under the hood. When I first start my car the squeeling is pretty annoying then it stops and only squeels when i excelerate. what could be causing this to happen?

    I have a 1993 cadillac eldorado 4.9L

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  3. #2
    drewsdeville is offline Cadillac Owners Master
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    Re: squeeling under the hood

    Make sure that the new belt is routed properly and is actually on the pulleys correctly. It must not be misaligned.

    If that's good, it's most likely a weak belt tensioner. Otherwise there could be something leaking into the belt or a pulley in the process of seizing.

  4. #3
    carnut is online now Cadillac Owners Master
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    Re: squeeling under the hood

    The first one tearing apart is your best clue. Something is touching the belt or a pulley is misaligned. Try to get a straight edge against the pulleys to ck alignment then check the tensioner. Belts never tear apart as they age. They get cracks across the grooves making them noisy or they stretch

  5. #4
    cadillaceldo93 is offline Cadillac Owners Member
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    Re: squeeling under the hood

    how can i check to see if the belt tensioner is bad. what do i look for or what will i notice if its good or bad?

  6. #5
    drewsdeville is offline Cadillac Owners Master
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    Re: squeeling under the hood

    The tension on the belt will be weak/non-existent. Sometimes they are so weak you can actually rotate/move the tensioner with your hand. Usually when it's bad, you'll see the tensioner pulley bounce around a lot when the engine is running. The tensioner pulley should not be moving when the engine is running.

  7. #6
    daniel58 is offline Cadillac Owners Fanatic
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    Re: squeeling under the hood

    There is also the possibility that a bearing is failing, the water pump, tensioner pully, alternator, etc. You might want to spin each of these to see if they are locking up. Its probably the tensioner but while you have the belt off it wouldn't hurt to check the bearings.

  8. #7
    the recluse is offline Cadillac Owners Connoisseur
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    Re: squeeling under the hood

    Quote Originally Posted by daniel58 View Post
    There is also the possibility that a bearing is failing, the water pump, tensioner pully, alternator, etc. You might want to spin each of these to see if they are locking up. Its probably the tensioner but while you have the belt off it wouldn't hurt to check the bearings.
    My thoughts exactly.

  9. #8
    cadillaceldo93 is offline Cadillac Owners Member
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    Re: squeeling under the hood

    I'm about to go look under the hood. I actually just replaced the water pump a month ago.

  10. #9
    carnut is online now Cadillac Owners Master
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    Re: squeeling under the hood

    Then the belt came apart? I would recheck your installation. Something is touching the belt tearing it.

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