Question about 1992 Cadillac Seville

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Grinding noise coming from one of the pullies (bottom one).its a 93 cadillac 4.9 engine.

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Good morning, If the noise is coming from the pulley closest to the radiator the it is the air conditioning compressor. You have a couple of repair options: If the noise comes all the time, a/c off then you have a failed pulley bearing to repair you can just replace the bearing or replace the pulley and bearing as a unit and the clutch, you can replace the whole compressor. you can get a smaller belt and by-pass the a/c compressor. getting a belt will be a hit and miss attempt because I can't tell you the length belt you need. You might try putting a small rope around the pulleys the same way the regular belt is routed then take it to a parts store to have them attempt to match it up (take old belt with you so they can see the width. This needs to be fixed because the noisy pulley will lock up, break the belt, when that occurs you won't have any power steering, the water pump will quit and the engine will over temp (run hot). Hope this helps

Posted on Sep 06, 2010

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pullys have bearings and the bearings will go bad. what you need to figure out is what pully is makeing the noise and replace said pully. another problem you might have is the power steering pump. check the fluid level to make sure it's not low or dry. when a power steering pump goes bad it makes some noise. another possibale problem is if the car has a/c. the a/c compressor has an internal clutch that will make a grinding noise when it goes bad. To test this start the car turn you a/c on or your defrosters on and listen for the noise in the lower front area of the engine compartment (usually the lowest front pully). shut off the car and look for metal shavings on the pully. for this you should take the car to someone to evacuate the system so you don't release refridgerant into the atmosphere (it is also very flamable) and will need to be oiled with 134a oil and recharged after the repair. hope this helps.

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