Loosen the alternator tensioner bolt. You will be able to slide the alternator either way to adjust the tension on the belt.
The alternator is rotated on it's pivot to adjust belt tension.
If it is a serpentine belt, the tension is automatically adjusted by the tension idler. If the belt is loose then the tensioner needs replacing. If it is a normal drive belt, then the alternator is mounted on a slotted bracket that allows you to adjust the position of the alternator. You can loosen the bolts and adjust the tension on the belt.
If it is a drive belt and not a serpentine belt is has no tensioner. You manually adjust the tension by normally adjusting tension by moving the alternator. Loosen to bolts holding the alternator in place and then adjust the tension. Tighten the bolts when the tension is right. If it is serpentine belt if you follow the belt around the the engine you will see the tensioner.
Apply a wrench to the center bolt on the pully and turn it will adjust the tension.
To adjust the alternator belt on a 1990 Plymouth Sundance with a 2.5 engine, first, locate the alternator and the tensioner bolt. Loosen the tensioner bolt to allow the alternator to pivot. Adjust the belt tension by moving the alternator until there is about 1/2 inch of deflection when pressing down on the belt midway between the pulleys. Once the desired tension is achieved, retighten the tensioner bolt securely.
To adjust the loose alternator belt on your 1986 Chrysler LeBaron convertible with a 2.2L engine, first locate the alternator, which is mounted on the engine. Loosen the mounting bolts on the alternator and the adjusting bolt to allow movement. Adjust the alternator to achieve the proper tension on the belt—generally, you should be able to press the belt down about half an inch at the midpoint. Once the desired tension is achieved, tighten the bolts securely to hold the alternator in place.
To adjust the alternator belt in a 2001 Altima, first, locate the alternator and loosen the mounting bolts that secure it. Then, use a wrench to turn the adjusting bolt or tensioner to increase or decrease the tension on the belt. Ensure that the belt has the proper tension by pressing down on it; it should have about half an inch of play. Finally, tighten the mounting bolts securely once the desired tension is achieved.
To adjust the alternator belt on a 306TD, first, loosen the bolts securing the alternator to its mounting bracket. Then, by using a wrench, carefully move the alternator away from the engine to create tension on the belt. Once the desired tension is achieved—typically around 1/2 inch of give when pressed in the middle—tighten the bolts securely to hold the alternator in place. Finally, check the tension again to ensure it remains correct after tightening.
If the alternator is driven by a drive belt, the answer is yes. You adjust the tension by loosing the bolts on the alternator mounting brackets and sliding the alternator until the proper tension, (around 1/4" deflection at mid point of the belt) is achieved. If however it has a Serpentine Belt driving the alternator, then there is no adjustment. Tension is held by the idler pulley. If it is loose then the belt is worn out, the idler tensioner is defective, or both.
To adjust the alternator belt on a Vauxhall Tigra, first, ensure the engine is off and cool. Locate the alternator, then loosen the bolts securing it to the engine. Adjust the position of the alternator to achieve the proper tension on the belt—there should be a small amount of flex, typically about half an inch when pressed. Once the desired tension is achieved, re-tighten the bolts securely.
To adjust the fan belt on a Daewoo Matiz, first, locate the tensioner pulley and loosen the bolts holding the alternator in place. Then, adjust the tension on the fan belt by moving the alternator until you achieve the desired tension. Finally, tighten the bolts on the alternator to secure it in place and check the tension again to ensure it's properly adjusted. Always refer to the vehicle's service manual for specific instructions and torque specifications.
To adjust the tension on a 1978 Datsun 620 bulletside, locate the alternator or belt tensioner. Loosen the mounting bolts slightly, then adjust the tension by moving the alternator or tensioner to achieve the desired belt tightness—there should be about half an inch of play. Once the tension is correct, tighten the bolts securely to maintain the adjustment. Always check the belt for wear or damage during this process.