Question about 2003 Toyota Camry
Drive belt broke, there's no sticker under the hood that tells you which bolt adjusts the tension
These instructions are for a 1998 Camry V-6. There will be a pivot bolt on the top/back side of the alternator ...loosen this. Now under the alternator there will be an adjustment bolt (about three inches long) that runs at about a 45deg. angle toward the ground. On the left side of the small block this adjustment screw runs through there will be another bolt (locking bolt) that you also loosen. This allows the adjustment screw to loosen and then tighten the belt back up. Now turn the adjustment screw to the left ( I broke the head off of mine...they're very weak so loosen accordingly) to loosen slide the belt off. Put the new belt on turn the adjustment bolt to the right until the desired tension is achieved then tighten the two other bolts and you're done.
Posted on Mar 11, 2013
First you need to figure out if you have an automatic tensioner or an adjustable one. so look at the pullies which ones are not accesories (ie not an alternator pully, power steering.) some pullies will just be on there own not driving anything. is this pully connected to something like this O>o <--this end is the pully.
pully mounting bolt ^ ^arm with hole for rachet
or does it look like the pully is attached to a threaded pole.
the auto adjuster need a rachet to pull back on it (because it's spring loaded) while you install the new belt.
the other need the nut on the pully loosened and the threaded pole loosened will move the pully removing tension from the belt (opposite will tension the new belt).
tighten belt until you can only twist it in half.
Posted on Jun 25, 2009
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Posted on Jan 02, 2017
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Jul 28, 2014 | 1994 Jeep Grand Cherokee
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.
Fig. . . . then remove the alternator belt from the engine
Fig. . . . then remove the power steering belt from the engine
Fig. Accessory V-belt routing-Mitsubishi 3.5L and 1998-00 3.0L SOHC Galant engines
ALTERNATOR AND A/C COMPRESSOR
Mar 21, 2013 | 1996 Mitsubishi Mirage
Belt tension is very important, as a belt that is too tight will put too much stress on the bearings of the components it drives, causing them to wear out prematurely. A belt that is too loose will slip, causing (1) the belt to wear out quickly due to friction heat, and (2) inefficient alternator, air pump, cooling fan or air conditioner operation because much of the turning power supplied by the main drive pulley is lost.
The belts should be inspected and/or adjusted at 2,000 miles (3,221 km) and then every 4,000 miles (6,441 km). First, make sure that the belt is properly positioned in the pulley. Check the pulleys for damage. Inspect the belts for cracks and signs of fraying. These usually develop on the inner surface and extend into the backing or outer surface of the belt. Check also for glazing, a completely smooth appearance which indicates slippage. A belt that is in good shape will have a slightly grainy appearance like cloth. Replace belts that show cracks or glazing.
Check belt tension. Apply pressure with your thumb at the mid-point between two pulleys, and the belt should stretch or deflect about 1 / 4 - 1 / 2 in. (6-13mm). If the belt is too tight or too loose, adjust/replace as necessary.
See Figures 1, 2 and 3
To adjust belts, first locate the mounting bolt on the air pump or alternator (each has its own belt and adjusts to permit that belt to be tensioned correctly). This bolt attaches the unit to the engine and has a nut on the end. Put a wrench on either end and loosen the bolt until there is practically no tension on it. Then, loosen the adjusting bolt, which is located on the opposite side of the unit and which passes through a slot. Pull the alternator or air pump away from the engine and tighten the adjusting bolt just enough to hold the unit while you check tension. Repeat the adjustment procedure until the belt deflects the proper amount, then fully tighten the adjusting and mounting bolts. Avoid too much belt tension or overtightening of bolts. A new belt should be tensioned just slightly more (about 0.4 in. or 10mm deflection) and checked after several hundred miles of operation to make sure that tension is still adequate. (Tension is lost very rapidly until a new belt is broken in.)
Fig. Fig. 3: On some GLC engines equipped with power steering, the pump pulley uses a slotted adjusting bar, adjusting bolt and locknut to adjust belt tension
Late model GLCs, 323s, 626s, MX-6s and 929s may use an adjusting bolt on either the idler pulley (a pulley which is not directly associated with any of the accessories) or on the power steering pump itself. This bolt makes adjustment much easier because you don't have to hold the accessory under a great deal of tension while tightening the mounting bolts.
On models where the idler pulley has a locknut at its center, simply loosen the locknut, then turn the adjusting bolt clockwise to increase belt tension or counterclockwise to decrease it or remove the belt. Do not forget to retighten the locknut when tension is correct, or vibration may cause it to fall off. Recheck the tension with the locknut tightened and readjust if necessary.
To adjust the power steering pump pulley on the GLC, loosen the slotted adjusting bar bolt, the mounting bolt across from it, and the locknut at the bottom of the adjusting bolt. Turn the adjusting bolt counterclockwise to remove the belt or reduce tension, and clockwise to increase it. When tension is correct, tighten the adjusting bolt locknut, adjusting bar bolt, and pump mounting bolt.
On 626, MX-6 and 929 models with a 4-ridge or 5-ridge ribbed type V-belt driving both the air conditioner and power steering pump, belt tension is much greater. With a used belt, deflection should only be about 1 / 4 in. (6.35mm).
See Figures 4, 5 and 6
The RX-7 may be equipped with as many as three or four separate drive belts. The belts are arranged at the front of the engine and drive the cooling fan/water pump, alternator, power steering pump, emission control air pump and air conditioner compressor (if so equipped).
Fig. Fig. 4: Checking belt tension on 1979-85 RX-7
Check the tension of each belt at the arrows numbered 1, 2, 3 and 4 (depending on year) shown in the illustration. Press on the belt with your thumb using moderate pressure (about 22 lbs.). The belts should give or deflect the amounts shown in the chart.
Fig. Fig. 6: RX-7 belt deflection limits
Use the following appropriate procedure and illustration to make drive belt adjustment(s).
ALTERNATOR AND AIR PUMP
See Figure 7
Fig. Fig. 7: Adjusting alternator drive belt tension on 1986-89 RX-7
When prying on the alternator or air pump, make sure the prybar is anchored against the engine case and not against a component (distributor cap, etc.) which could break.
Fig. Fig. 8: Adjusting air conditioning compressor drive belt tension on 1986-89 RX-7
Fig. Fig. 9: Adjusting power steering pump drive belt tension on 1986-89 RX-7
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