You put a 14mm wrench or socket on the bolt and pull it towards the passenger side. That will loosen the belt. The tension is set automatically by the tensioner.
Where is the tensioner pully on a 1992 Lexus sc300
With a self adjusting tensioner pulley, there is no adjustment for tension.
standing and the front bumper, facing the engine with the hood up it is at the top left, attached to the top left belt pully
The tensioner pully is just to the left of the alternator. It is an arm with a round pully on the end of it. It has a square 3/8 ratchet attatchment. It is about 7 inches long.
CHECK THE IDELER PULLY OR BELT TENSIONER PULLY.
Replace tentioner pully on 2.8 multiport
its on the left side. its the easyest pully to see.
A spring loaded pully that keeps the serpentine belt tight
You must loosen the nut on the tensioner pully the from under the car there is a tensioning bolt 12mm you will tighten it and it will pull the pully down then take the belt off, new one on, then loosen the tensioner bolt til the belts tight and tighten the bolt in the middle of the pully then your all done
There should be a small square hole near the tensioner pully. A 3/8 socket driver will fit in the hole and then you can losen the tensioner.
Idler pully.
Yes, the bearing in that pulley may be going bad.