Most of them move some but if your belt is squeeling you probably need to replace the tensioner.
Tensioner pulley for the water pump belt on the opposite side of the motor the other side, not the side with the surpentine belt.
look at your belt with the engine running (keep your fingers out) the pully on a little arm that bounces is your tensioner.
A few things, engine not running, loose belt, or seized pully on idler/tensioner or other acc.
Yes, a bad belt or tensioner can be related to a rough idle. If it is not tight enough, or worn it is not able to run as smoothly as needed to keep the engine running smooth.
3 MUST haves for an engine running. #1 - Compression #2 - Fuel #3 - Spark check to make sure you have these 3 first.
you have to remove the belt tensioner to remove the belt off of the engine.
Remove surpentine belt,then take out bolt that goes through tensioner to engine.
The whining could be related to the alternator. Does the car have any electrical problems such as the battery drains and dies while car running, are your belt(s) tight? in good condition? It might be a belt tensioner or idler pulley that is causing the whining.
To change the serpentine belt tensioner on a '97 Cavalier W24 L engine, first, ensure the engine is off and cool. Locate the tensioner, then use a wrench or socket to rotate it counterclockwise, releasing tension on the serpentine belt. Remove the belt from the tensioner and the other pulleys, then unbolt the tensioner from its mounting bracket. Install the new tensioner, re-thread the serpentine belt according to the routing diagram, and finally, check the tension and alignment.
Belt Tensioner All engines use an automatic drive belt tensioner. On the 7.5L engine, there are two belts; one uses the automatic tensioner, while the alternator belt requires periodic tensioning. On all belts using an automatic tensioner, no adjustment is necessary because the tensioner adjusts for belt wear. To adjust the tension on the 7,5L engine alternator belt, loosen the adjusting bolts and rotate the alternator until the proper tension is on the drive belt and tighten the adjusting bolts. It is recommended that the belt tension indicator mark be inspected with the engine OFF at 60,000 mile (96,000 km) intervals. If the wear indicator mark is out of specification, the drive belt is worn or an incorrect drive belt has been installed. The 4.6L, 5.4L, 6.8L, all have one belt and one belt tensioner. Look at the diagram on top of the radiator or somewhere in the engine compartment.
2001 Toyota corrollas have a tsb on the acc. drive belt tensioners. the hydraulic tensioner leaks and causes the belt to loosen and wear prematurely. Replace both the tensioner and belt to solve the problem.
Use a tensioner tool or wrech if you can to pull the tensioner so the belt loosens. thread in the new belt and release the tensioner to tighten the belt. Belt diagram is usually in the engine compartment