How do I loosen the tensioner - 2008 Toyota Yaris Sedan

your tensioner pulley is most likely spring loaded with a square slot and it made for a 3/8 inch drive ratchet set your ratchet to loosen stick it in the hole and give it a little crank it is spring loaded so you'll have to hold of their why you pulled the belt off but it will loosen the belt and should be really easy to slip off

ADJUSTMENT

Excessive belt tension will cause damage to the alternator and water pump pulley bearings, while, on the other hand, loose belt tension will produce slip and premature wear on the belt. Therefore, be sure to adjust the belt tension to the proper level.
To adjust the tension on a drive belt, loosen the adjusting bolt or fixing bolt locknut on the alternator, alternator bracket or tension pulley. Then move the alternator or turn the adjusting bolt to adjust belt tension. Once the desired value is reached, secure the bolt or locknut and recheck tension.

REMOVAL & INSTALLATION

1.5L, 1.6L, 1.8L, 2.0L and 2.4L Engines

Fig. Accessory V-belt routing-Mitsubishi 1.5L, 1.6L, 1.8L, 2.0L and 2.4L engines
Alternator Belt

Fig. Loosen the adjuster lock bolt . . .

Fig. . . . then remove the alternator belt from the engine

1. Loosen the alternator support nut.
2. Loosen the adjuster lock bolt.
3. Rotate the adjuster bolt counter clockwise to release the tension on the belt.
4. Remove the belt.

To install:

1. Install the belt on the pulleys.
2. Rotate the adjuster bolt clockwise until the proper tension is reached.
3. Tighten the adjuster lock bolt and the alternator support nut.

POWER STEERING BELT

Fig. After the adjusting and fixed bolts are loosened, rotate the pump . . .

Fig. . . . then remove the power steering belt from the engine

1. Remove the alternator belt as described above.
2. Loosen the power steering pump adjusting bolts.
3. Remove the power steering pump fixed bolt on the rear of the bracket.
4. Rotate the pump toward the engine and remove the belt.

To install:

1. Install the belt on the pulleys.
2. Rotate the pump until the proper tension is reached.
3. Tighten the adjusting bolts on the pump.
4. Tighten the fixed bolt on the rear of the bracket.
5. Install the alternator belt.

A/C COMPRESSOR BELT

1. Loosen the tension pulley and remove the belt.
2. The installation is the reverse of the removal.

3.0L DOHC, 3.0L SOHC Galant, and 3.5L Engines

Fig. Serpentine belt routing-Mitsubishi 3.0L engines (except 1998-00 Galant models)

Fig. Accessory V-belt routing-Mitsubishi 3.5L and 1998-00 3.0L SOHC Galant engines
ALTERNATOR AND A/C COMPRESSOR

1. Disconnect the negative battery cable.

CAUTION Wait at least 90 seconds after the negative battery cable is disconnected to prevent possible deployment of the air bag.

1. Raise and safely support the vehicle and remove the front undercover.
2. Loosen the tension pulley fixing nut and relieve the tension on the belt by turning the adjusting bolt.
3. Remove the belt.

To install:

1. Install the belt on the crankshaft and alternator pulleys.
2. Using the adjusting bolt on the tensioner, tighten the belt to the desired tension.
3. Tighten the fixing nut to hold the adjustment.
4. Install the undercover and lower the vehicle to the floor.
5. Connect the negative battery cable.

POWER STEERING BELT

1. Disconnect the negative battery cable.

CAUTION Wait at least 90 seconds after the negative battery cable is disconnected to prevent possible deployment of the air bag.

1. Raise and safely support the vehicle and remove the undercover.
2. Remove the alternator and A/C compressor belt.
3. Lower the vehicle and remove the cruise control pump link assembly.
4. Place the power steering hose under the oil reservoir.
5. Loosen the tension pulley fixing bolts and remove the power steering pump drive belt.

To install:

1. Install the power steering pump drive belt.
2. Insert an extension bar or equivalent into the opening at the end of the tension pulley bracket and pivot the pulley to apply tension to the belt.
3. Tighten the fixing bolts.
4. Raise the vehicle and install the alternator and A/C compressor belt.
5. Install the undercover and lower the vehicle.
6. Connect the negative battery cable.

3.0L SOHC Diamante

1. Disconnect the negative battery cable.
2. Loosen the lockbolt on the face of the A/C tensioner pulley.
3. Turn the adjusting bolt of the A/C tensioner pulley to loosen the tension of the A/C belt.
4. Remove the A/C compressor belt.
5. Loosen the locknut on the face of the power steering/alternator tensioner pulley.
6. Turn the adjusting bolt of the tensioner pulley to loosen the tension of the belt.
7. Remove the power steering/alternator belt.

To install:

1. Install the power steering/alternator belt first and then the A/C compressor drive belt.
2. Adjust the belts to the proper tension by turning the adjusting bolts and tighten pulley fixing nut/bolt.
3. Tighten the mounting nut of the power steering/alternator tensioner pulley to 36 ft. lbs. (50 Nm).

You don't lossen the nut holding the pulley
on the tensioner,you pivot the tensioner arm
to loosen the belt


The should be a hole for your ratchet in the arm,
to pull off the tension

loosen the belt tension adjuster jam nut on side and loosen the lockscrew to loosen release tension to the AC COMPRESSOR belt.your vechicle has two tension adjusters one for power steering and tension adjuster for AC COMPRESSOR AND ALTERNATOR.

Assuming that the belt is not broken ... you need to tighten the belt. This one is not as easy as the other two which have tensioners. This belt is tensioned by the alternator itself. I've found adjusting it to not be a lot of fun ... the tricky part is loosening the bolt that the alternator pivots on. There isn't a lot of room and I find one of the small palm ratchets to be helpful. So to tighten, you'd loosen the upper bolt that actually holds the tension on the belt, loosen the bolt that the alternator pivots on, re-tension the belt (using something to pry on the alternator if necessary) and tighten the two bolts again. If you have to replace the belt you'll need to remove the outer two to get to this one. The outer two tensioners are adjusted by loosening the bolt that holds the tensioner pulley in place and then turning the tensioner bolt itself to tighten or loosen the belt(s)... then retighten the bolt holding the pulley.

U do not loosen any bolts to adjust tension.tighten all bolts first.Then with a 3/8 ratecht in the slot of the belt tensioner rotate the tensioner until you can install the belt correctly.then release the tensioner and take out the ratchet.

Assuming you're talking about the 22re ... there are tensioners on both the power steering (first) and the a/c belts. Loosen the bolt on the pulley and then the bolt on the side of the tensioner tightens and loosens the belt. You might want to check the inner ... alternator / water pump belt while you're there. No tensioner for this one, you need to loosen the bolt that the alternator pivots on, loosen the bolt on top of the alternator that holds it in place on that bracket and then pry alternator and tighten bolts to hold the tension.

First is the PS/AC belt. Loosen bolts A, B and C, then use bolt D to adjust the tension.


The alternator appears to be tensioned by leverage - no built-in adjuster. Loosen bolts highlighted in red, and swing bottom of alternator to loosen/tighten the belt. Tightening may require using a prybar to gain sufficient tension - be careful when doing this.

i believe its a 15mm racthet on the tensioner . just put it on the tensioner and pull it down to loosen the belt