My air conditioning compressor clutch pulley is supposedly in need of repaie..same shop told me a month ago it was my serpentine belt that was the problem...not sure what to fix any suggestions?

Question edited for clarity.
Question moved to correct category.

That is not the way to fix it. You remove the AC Pump and install a bypass pulley. It keeps the same belt, route and tension.

1988*-1995 Chevy Pickup A/C Compressor Bypass Pulley

https://1autoshop.com > i-23891005-1988-1995-chevy...
Dorman's A/C Compressor Bypass Pulley is installed in place of a new compressor, significantly reducing parts and labor costs. For Use With 6-groove Serpentine ...
US$78.00 · ‎In stock
Missing: 7.4, ‎' Must include: 7.4,

Chevrolet K3500 A/C Compressor Bypass Pulley - Advance ...

https://shop.advanceautoparts.com > find > chevrolet-k...
Low prices on A/C Compressor Bypass Pulley for your Chevrolet K3500 at Advance Auto Parts. Find aftermarket and OEM parts online or at a local store near ...

People also ask

Can I bypass the AC compressor pulley with a shorter belt?

Yes, this is possible. However, unless it was the AC compressor clutch and pulley which failed, bypassing the AC pulley is unnecessary. Simply disconnect the wire to the AC compressor clutch and that should do the trick.
Oct 9, 2016

That isn't the way to do it. You should have a bypass pulley, which keeps the route and the angles and the same length belt.

Details of bypass and the serpentine belt diagram in the link

https://www.google.com/search?q=2006+Nissan+Altima.+Serpentine+belt+diagram+no+air+conditioning&tbm=isch&ved=2ahUKEwiT2pXX38H0AhWQsHIEHZE8ARMQ2-cCegQIABAA&oq=2006+Nissan+Altima.+Serpentine+belt+diagram+no+air+conditioning&gs_lcp=CgNpbWcQAzoHCCMQ7wMQJ1CQGliJTmC4aWgBcAB4AIABa4gBnwiSAQQxMi4xmAEAoAEBqgELZ3dzLXdpei1pbWfAAQE&sclient=img&ei=0femYdOtEpDhytMPkfmEmAE&bih=937&biw=1920&rlz=1C1QJDB_enCA643CA644

..

• Located front of engine, close to crank pulley
• press the helpful button and follow me on Fixya for more tips
• Insert the square tip of a 1/2-inch socket wrench into the square hole in the center of the serpentine belt's adjustment pulley. The adjustment pulley is the smallest pulley the belt wraps around.
• Pull the adjustment pulley toward the engine with the socket wrench to release the tension on the serpentine belt, then pull the belt off the air conditioning compressor's pulley.
• Remove the bolts which secure the air conditioning compressor to its mounting brackets with an open-end wrench, then position the compressor to the side of the engine compartment. Do not disturb the hoses that attach to the compressor.
• Pull the electrical connection off the crankshaft sensor.
• Remove the two bolts that secure the crankshaft sensor against the engine with an open-end wrench, then slide the sensor out of the engine.
• Slide the new crankshaft sensor into the engine, then install and tighten the sensor's two securing bolts with an open-end wrench.
• Press the electrical connection onto the crankshaft sensor.
• Position the air conditioning compressor against its mounting brackets, then install and tighten the compressor's bolts with an open-end wrench.
• Pull the serpentine belt's adjustment pulley toward the engine with the socket wrench, then position the belt onto the air compressor's pulley. write up found @ehow

How to Replace the Crankshaft Sensor in Ford 150 eHow

I suspect that the clutch bearing on your a/c compressor is failing. This would cause increased resistance to the spinning motion induced by the serpentine belt. The belt then continues to travel around the pulley on the a/c compressor, but the pulley doesn't spin and creates added friction on the belt. After a brief period of time, the belt heats up to the point of smoldering and begins smoking. When you select "defrost" you are engaging the a/c compressor clutch just as if you selected air conditioning. Take your car to an automotive repair professional for replacement of the a/c clutch bearing or, if the clutch is severely degraded, replacement of the a/c compressor. Good luck.

nstructions

1. • 1

     Insert the square tip of a 1/2-inch socket wrench into the square hole in the center of the serpentine belt's adjustment pulley. The adjustment pulley is the smallest pulley the belt wraps around.
     

   • 2

     Pull the adjustment pulley toward the engine with the socket wrench to release the tension on the serpentine belt, then pull the belt off the air conditioning compressor's pulley.
     

   • 3

     Remove the bolts which secure the air conditioning compressor to its mounting brackets with an open-end wrench, then position the compressor to the side of the engine compartment. Do not disturb the hoses that attach to the compressor.
     

   • 4

     Pull the electrical connection off the crankshaft sensor.
     

   • 5

     Remove the two bolts that secure the crankshaft sensor against the engine with an open-end wrench, then slide the sensor out of the engine.
     

   • 6

     Slide the new crankshaft sensor into the engine, then install and tighten the sensor's two securing bolts with an open-end wrench.
     

   • 7

     Press the electrical connection onto the crankshaft sensor.
     

   • 8

     Position the air conditioning compressor against its mounting brackets, then install and tighten the compressor's bolts with an open-end wrench.
     

   • 9

     Pull the serpentine belt's adjustment pulley toward the engine with the socket wrench, then position the belt onto the air compressor's pulley.
     

Read more: How to Replace the Crankshaft Sensor in a Ford F-150 ' eHow.com http://www.ehow.com/how_6769823_replace-crankshaft-sensor-ford-f_150.html#ixzz2Ebai9Ftj

the clutch and bearing assembly is failing it is a freewheeling pulley till clutch is engaged but it has bearings which can fail

It sounds like your air conditioning compressor or air conditioning clutches have gone bad the solution is to have rebuilt (or buy a rebuilt)air conditioning compressor. Do not attempt to work on thr compressor yourself unless you are certified in air conditioning, gas in system can kill you if you breeth it in.

The only air conditioning component I can think of which could cause the serpentine belt to break would be the compressor. If you look under the hood you can see the belt winding around several pulleys of engine parts. The air condition compressor is the part which has two hoses with metal fittings and a wire harness attached to it. When the engine is on the pulley attached to the compressor should be rotating at the same speed as the other pulleys. Keep your hands, clothing and jewelry clear of all moving engine parts. If it is moving at the correct speed it is good, if it is not moving correctly it will cause the belt to slip creating friction until the belt breaks. Once the belt breaks the engine cooling, power steering and battery charging will stop, which will quickly cause the engine to stop working. This could cause engine damage, but it will defiantly strand you with a broken vehicle. If the pulley is working and the air conditioner is working, do not worry about it, but you may want to check the belt with the engine off for cracks or damage. If the belt is slipping and the air condition is not working, the vehicle will need a new compressor, coolant, and possibly a dryer. This could set you back about three hundred dollars. If you do not want to fix the air conditioning and the belt is not slipping run the vehicle as usual if the belt is good. If you do not want to fix the air conditioning and the belt is slipping you may be able to bypass the compressor and use a smaller belt.

Do you have the air conditioning on when you hear this rattle? If so, it could the clutch for the a/c compressor. You may also want to check the status of the idler pulley on the serpentine belt. Hope this helped and best wishes.

You answered your own question? Fix the compressor! What state are you in? Do you need A/C? if not, bypass the a/c and use a shorter belt, if it does not interfere with anything.