Hi, I have have the very same problem. I have a 1991 Chev 3/4 tonne. The long stud (bolt) keeps turning and turning ...and the pulley has become loose but won't remove...and the stud keeps turning without coming off even though I put a pry bar behind it at the same time as using my rachet! Rodney
you dont adjust a tension pulley you adjust the position of the compressor to tighten the belt
It probably is the compressor that is locked up. If it is ok until the a/c is turned on, the compressor is locked up. If it is just the pulley bearing a special puller is required to remove the pulley and bearing.
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All instructions are assuming you are working from the front of the vehicle. If you do not still have the sticker showing you the belt routing attached to the vehicle take note of the route it takes before beginning. The Pulley is on your left, with a small square hole. Insert your 3/8 in ratchet into this hole, and pull the left (counter clockwise). You should then be able to remove the belt. The pivot point of when you released the tension is the bolt that will remove the tension pulley. Simply remove it, and replace the tension pulley assembly. (The part cost me about $15 at Advance Auto in Florida- I had to call ahead and I had my wife pick it up.)
Typically it's the highest pulley, right behind the fan shroud. The tensioner pulley is spring loaded to assure proper belt tension and most tensioners provide a way to easily remove the tension to the belt so that you can replace the belt or belt driven accessories.
Yea... that's a unique problem. There is a special puller that's used to remove the power steering pump pulley. You can usually borrow, rent or buy the puller from most auto parts retailers. After the pulley is off you can get to the bolts.
That requires the use of a power steering pulley PULLER. ( A special tool ) The pulley is pressed on.
http://youtu.be/u5BUl9R42t0
remove the drive shaft
Buy a Chevy!!!! That was a big help. Most but not all serpentine belt systems have a spring loaded tension pulley that just holds constant tension on the belt. If there is a tension pulley, it will be the one pulley that is not attached to anything like the alternator or AC. After that, the alternator is the most likely to be the one that adjusts.
The alternator should be on the front of the motor with a belt on the pulley and wires connected to the back of it that can be removed.
If you are just removing the pulley, Then just remove the bolts that hold it on being sure to remove the bolt that is in the middle of the pulley too. Then take a hammer and knock it off.