In the center of the drum/pully there is a bolt (or nut, depending). This is what is locking the pully in place. Loosen it (no more than it takes to free it) befor turning the adjuster. Be sure to loosly snug it down to check your final adjustment and if correct, then you can tighten it all the way. (If it is too loose when the adjustment is set then the drum/pully will move when you tighten it and throw off the adjustment.)
Idler pulleys are used to maximize belt contact with other pulleys and to redirect belt around other parts that might interfere with the belt.
On my 97 3.5L you have to loosen the bolt (15mm)on the front of the idler (loosen, don't remove) then go underneath and the is a 13mm bolt that adjusts the position of the idler for tension. Loosen this and the idler should loosen up.
If you are referring to the Serpentine belt, you loosen no pulley. You simply remove tension from the belt. The tension is applied by the Idler Pulley. Pry the idler back and remove the belt.If you are referring to the Serpentine belt, you loosen no pulley. You simply remove tension from the belt. The tension is applied by the Idler Pulley. Pry the idler back and remove the belt.
They very in price, depending on the car, from around $12 to $80.
there is one, but two if you count your belt tensoiner.
Replace the tensioner assembly as one piece.
only if the idler arm will not hold the tension on the belt and the pulley needs replaced when the are warn sharp or warn flat
The engine usually has an idler and/or tensioning pulley as well as a few pulleys that use the power of a traveling serpentine belt to drive components such as the alternator, a/c pump, etc. Any of the pulleys that have one or more grooves that assist to guide the belt(s) are, technically, sheaves. Idler or tensioner pulleys that are completely flat because the flat back of the belt rides on them are not sheaves, but are pulleys.
== == it is a free pulley that works as a tensioner on any belt bolted to hold or spring loaded An idler pulley usually tensions a belt.. eg supercharger belt is kept taut by its respective idler pulley
Put an 18mm wrench on the lower tensioner belt and rotate CCW to loosen the tension. Remove the belt from around the alternator pulley, and slowly release the tensioner. Unwrap the belt from all the pulleys and install the new belt following the belt diagram located near the radiator support. ALWAYS make sure the grooved side of the belt is contacting the grooved pulleys, and the smooth side of the belt is contacting the smooth pulleys (Idler pulleys). Groove to Groove -- Smooth to Smooth
Hey, yes the Idler Pully nut is reverse tread (you have to turn right to loosen this) this is because you turn left to loosen belt tension. I believe this is true for a lot of GM engines.
idler pulley, the only one that will move