Question about Toyota Land Cruiser

1 Answer

Where is the belt tightening adjustment located. I have tried turning the nut under the alternator but nothing is moving. The belts and idler were recently replaced, but they are getting looser and looser.

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  • Fernand Luc Bergeron
    Fernand Luc Bergeron Jan 01, 2011

    have you tried just changing the belt ?

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  • 63 Answers

Richard, please exercise caution when working on belts on your engine. If you haven't already I would suggest disconnecting the negative battery terminal to ensure nothing will move when your hands are in the belt area. Your question did not indicate what type of Toyota or year it is. I have a two type of belt answer:

On my 87 Toyota truck, the "V" belt idler for my AC pump was adjusted by loosening the nut in the center of the pulley wheel, then adjusting a bolt behind the idle pulley in or out as needed. Turing the bolt moves the pulley in or out depending on what way you turn it. When the belt is tight, you then lock the pulley in place by tightening the bolt in the center of the pulley. My alternator was the belt tensioner for the second belt. The top nut would allow the alternator to move, but you also had to loosen the lower bolt and nut under the alternator to allow it to pivot on that bolt. The top nut was tightened when the desire belt tension was achieved. The lower bolt is tightened back as well. Over tightening the belt can put extra wear on the alternator and water pump bearings, so use caution.


If your vehicle is newer, the belt might be flat or a serpentine belt type. These types of belts are kept tight by a spring load from the idler pulley. The spring is inside the round housing part of the idler arm. That end is usually attached to the engine. The pulley is on the swing part of the arm and is used to apply tension to the belt to keep in on all the other pulleys. In the casting, you will see a square hole for your 3/8" socket wrench to fit into. This allows you use your wrench to release the tension from the belt. The spring and movement of the arm applies the required tension to the belt and does not need to be adjusted, but just inspected every so often to make sure they still move. In your vehicle engine area, you might have a small diagram showing the route the belt takes through your accessories on the engine. When the pulley arms get old, they can stick and not apply the proper tension to the belt. The belt does stretch when it first is used and when it gets older. Your new belt circumference might also be too big now and the pulley arm might be at its limit of travel. I would suggest taking it back to who did the work to have them correct this. You can check the tension by pressing down on the belt between two pulleys and note the movement of the idler pulley arm. The pulley arm should move back when your release hand pressure to the belt.


I hope this helps. Please leave feed back if this was useful to you. Thank you.



Posted on Jan 01, 2011

  • richard343 Jan 01, 2011

    your advice was extremely helpful and I apologise for not giving the model and year. The vehicle is a 1997 Toyota Landcruiser Prado, with 3 micro V belts and an idler pulley. All three belts seem to tighten from the alternator by loosening the top bolt and turning a bolt located under the alternator. My problem is that nothing is moving when I turn this adjusting bolt.

  • Train Guy Jan 02, 2011

    Hi Richard. If you have three separate belts, I would think you would have more than one location to adjust these individually. I never have worked on a Land cruiser so I could be wrong.

    Looking at the alternator, does it appear to pivot on one bolt and on the other mounting bolt run through a slotted or elongated hole in the other mount?? Or does it appear to be basic mounting holes to just attach the alternator and hold into one position. If both appear to be just the same size as the bolt, the alternator might not be the unit to pivot to adjust the belts. Also, if more than one belt runs through the alternator pulley at different angles or directions, it would make it difficult for the alternator to tighten both or all three belts at the same time. The alternator might adjust for one, but he others might use something else to tighten them. I would suggest looking at any idler pulleys and other devices on each of the belts separately to see if they can be moved. Please examine the other idle pulleys and accessories and let me know what you find. A picture of the belt diagram in your vehicle engine area would be helpful to me if you can send that.

    Thanks

    Todd

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How to remove belts from 1994 dodge caravan 2.5 liter


Drive Belts

Print


INSPECTION

See Figures 1, 2, 3, 4 and 5
Check the condition and tension of all drive belts every 12,000 miles, or at least once a year. Loose drive belts can lead to poor engine cooling and diminished alternator, power steering pump, air conditioning compressor, or emission air pump output. A belt that is too tight places a strain on the bearings in the driven component.


0900c15280215ae4.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 1: There are typically 3 types of accessory drive belts found on vehicles today


0900c15280215ae5.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 2: An example of a healthy drive belt


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Fig. Fig. 3: Deep cracks in this belt will cause flex, building up heat that will eventually lead to belt failure


0900c15280215ae7.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 4: The cover of this belt is worn, exposing the critical reinforcing cords to excessive wear


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Fig. Fig. 5: Installing too wide a belt can result in serious belt wear and/or breakage
Replace any drive belt that is glazed, worn, cracked, or stretched to the point where correct adjustment tension is impossible. If two belts are used to drive a component, always replace both belts when replacement is necessary. After installing a new belt, run the engine for ten minutes, shut OFF the engine and recheck the belt tension. Readjust if necessary.


ADJUSTMENT

See Figures 6, 7, 8, 9 and 10


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Fig. Fig. 6: Engine belt tension chart-2.2L engines


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Fig. Fig. 7: Engine belt tension chart-1987-89 2.5L engines


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Fig. Fig. 8: Engine belt tension chart-2.6L engines


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Fig. Fig. 9: Engine belt tension chart-1990-93 models


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Fig. Fig. 10: Engine belt tension chart-1994-95 models
Two popular methods of checking drive belt adjustment are; the Belt Tension Gauge Method and the Belt Deflection Method. The former requires a special gauge and the latter requires a straight edge and scale or just a good eye for measurement. The deflection method will be used in the following belt replacement instructions. A rule of thumb for checking belt tension by the deflection method is to determine the midpoint between two pulleys of the drive belt and press down at that point with moderate thumb pressure. The belt should deflect to the measurement indicated in the following installation procedures. Adjustment is necessary if the belt is either too loose or too tight.

WARNING A belt adjustment which is either too loose or too tight will eventually damage the accessory that belt is driving. A too loose adjustment allows free-play in the belt which could transfer a whipping motion or shock to the accessory drive pulley. Similarly, a belt which is too tight will preload the accessory bearings, leading to early failure.


REMOVAL & INSTALLATION

See Figure 11
Raise the front of the vehicle, support on jackstands and remove the lower splash shield if access is hampered due to space limitations when changing drive belts.


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Fig. Fig. 11: Support the vehicle, then remove the lower right side splash shield for access to the drive belts
2.2L Engines
A/C COMPRESSOR DRIVE BELT
See Figures 12, 13 and 14


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Fig. Fig. 12: A/C compressor drive belt adjusting points-2.2L engines


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Fig. Fig. 13: Loosening the locking screws for A/C compressor drive belt removal


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Fig. Fig. 14: Removing the A/C compressor drive belt from under the vehicle

  1. Loosen the idler pulley bracket pivot screw and the locking screw.
  2. Remove the belt and install a replacement.
  3. Using a breaker bar and socket apply torque to the welded nut provided on the mounted bracket to obtain proper tension.
  4. Tighten the locking screw first, followed by pivot screw. Tighten to 40 ft. lbs. (55 Nm).

ALTERNATOR DRIVE BELT (CHRYSLER TYPE)
See Figures 15 and 16


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Fig. Fig. 15: Alternator belt adjustment-2.2L engine


0900c15280215af3.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 16: Loosening the locking screw for alternator drive belt removal
If removal of the alternator belt is required, the A/C belt must first be removed.

  1. Loosen the pivot nut, locking screw, and the adjusting screw.
  2. Remove the belt and install a replacement.
  3. Adjust to specification by tightening the adjusting screw.
  4. Tighten the locking screw to 25 ft. lbs. (34 Nm).
  5. Tighten the pivot nut to 30 ft. lbs. (41 Nm).

ALTERNATOR DRIVE BELT (BOSCH TYPE)
If removal of the alternator belt is required, the A/C belt must first be removed.
  1. Loosen the pivot nut, locking nut, and adjusting screw.
  2. Remove the belt and install a replacement.
  3. Adjust to specification by tightening the adjusting screw.
  4. Tighten the locking nut to 25 ft. lbs. (34 Nm).
  5. Tighten the pivot nut to 30 ft. lbs. (41 Nm).

POWER STEERING BELT
If removal of the power steering belt is required, the A/C and alternator belts must first be removed.
  1. Loosen the locking screw, and pivot screw.
  2. Remove the belt and install a replacement.
  3. Install a 1 / 2 in. breaker bar into the pump bracket slot, apply pressure with the breaker bar and adjust the belt to specification.
  4. Tighten the locking screw first, then the pivot screw. Tighten to 40 ft. lbs. (55 Nm).

AIR PUMP DRIVE BELT
See Figure 17


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Fig. Fig. 17: Air pump belt adjustment-2.2L engines
When servicing the air pump, use the square holes provided in the pulley to prevent camshaft rotation.

  1. Remove the nuts and bolts retaining the drive pulley cover.
  2. Remove the locking bolt and pivot bolt from the pump bracket, then remove the pump.
  3. Remove the belt and install a replacement.
  4. Position the pump, then install the locking bolt and pivot bolt finger-tight.
  5. Install a 1 / 2 in. breaker bar into the bracket assembly (block the drive pulley to prevent camshaft rotation), and adjust the belt to specification.
  6. Tighten locking bolt and pivot bolt to 25 ft. lbs. (35 Nm).

2.5L Engines
AIR CONDITIONING COMPRESSOR
See Figure 18


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Fig. Fig. 18: Drive belt adjustment points-2.5L engines

  1. Loosen the idler bracket pivot screw and the locking screws to replace, or adjust belt.
  2. Remove the belt and install a replacement.
  3. Adjust the belt to specification by applying torque to weld nut on the idler bracket.
  4. Tighten locking screw first, followed by the pivot screw. Tighten to 40 ft. lbs. (55 Nm).

ALTERNATOR BELT
See Figure 18
If replacement of the alternator belt is required, the A/C drive belt must first be removed.
  1. Loosen the pivot nut, locking nut, and adjusting screw.
  2. Remove the belt and install a replacement.
  3. Adjust the belt to specification by tightening the adjusting screw.
  4. Tighten the locking nut to 25 ft. lbs. (35 Nm).
  5. Tighten the pivot nut to 30 ft. lbs. (40 Nm).

POWER STEERING PUMP
See Figure 18
If replacement of the power steering belt is required, the A/C and alternator belts must first be remove.
  1. Loosen the locking screw and pivot screw to replace, or adjust the belt.
  2. Remove the belt and install a replacement.
  3. Using a 1 / 2 in. breaker bar positioned in adjusting bracket slot, adjust the belt to specification.
  4. Tighten the locking screw followed by the pivot screw. Tighten to 40 ft. lbs. (55 Nm).

2.6L Engines
ALTERNATOR/AIR CONDITIONING COMPRESSOR BELT
See Figure 19


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Fig. Fig. 19: Drive belt adjustment points-2.6L engines

  1. Loosen the locking screw, jam nut, and pivot nut.
  2. Loosen the adjusting screw.
  3. Remove the belt and install a replacement.
  4. Adjust the belt to specification by tightening the adjusting screw.
  5. Tighten the locking screw followed by the pivot nut. Tighten to 16 ft. lbs. (22 Nm).
  6. Tighten the jam nut to 21 ft. lbs. (28 Nm).

POWER STEERING PUMP BELT
See Figure 19
If replacement of the power steering belt is required, the alternator and A/C belt must first be remove.
  1. Loosen the pivot screw, and the locking screw.
  2. Remove the timing pickup.
  3. Remove the belt and install a replacement.
  4. Install a 1 / 2 in. breaker bar in the adjusting bracket slot, torque to specification.
  5. Tighten the locking screw, followed by the pivot screw. Tighten to 40 ft. lbs. (55 Nm).
  6. Install the timing pick-up, and tighten to 160 inch lbs. (18 Nm).

Jul 26, 2012 | 1994 Dodge Grand Caravan

1 Answer

Tensioner location on 97 chrysler sebring 2.5L 6 cyl


The tensioner pulley looks like an idler pulley, only with an adjusting bolt protruding out about 2 inches from just behind the pulley. Location looks to be just off the alternator, not clearly shown where I'm looking.
To loosen belt, you loosen the tensioner pulley nut, and then turn the adjusting bolt in to relieve tension. When putting the belt back on, adjust tension with adjustment bolt, then tighten the pulley nut. This is for Sebring Coupe, Convertible is different. Good luck.

Jun 22, 2012 | Chrysler Sebring Cars & Trucks

1 Answer

How do Ireplace the alternator belt on a 1994 mitsubishi galant?


First take off the negative battery cable or blow the alternator fuse, facing the back of the car reach UNDER the alternator and loosen the bolt on the bottom right side, now loosen the bolt on the adjuster block on top, you can now turn the adjuster bolt and move the alternator to change the belt. If you need to change the steering pump belt on the front of the motor, you need to loosen the nut on the back side of the idler pulley it holds the adjuster pulley in place . Then you can use the adjuster bolt to move the pulley to adjust the belt. Do not forget to tighten the pulley nut when finished.

Jan 10, 2011 | 1994 Mitsubishi Galant

1 Answer

Belt routing


V-BELT ADJUSTMENT CAUTION
On models equipped with an electric cooling fan, disconnect the negative battery cable or fan motor wiring harness connector before replacing or adjusting drive belts. The fan may come on, under certain circumstances, even though the ignition is OFF. Alternator Drive Belt
  1. Position a ruler perpendicular to the drive belt at its longest run. Test the tightness of the belt by pressing it firmly with your thumb. The deflection should not exceed 1?4 in. (6mm).
  2. If the deflection exceeds 1?4 in. (6mm), loosen the alternator mounting and adjusting arm bolts.
  3. On 1968-72 V8 and 6 cylinder models, use a prytool to move the alternator toward or away from the engine until the proper tension is reached. NOTE: Apply tension to the front of the alternator only. Positioning the prytool against the rear end housing will damage the alternator.
  4. On 1973 and later V8 models, place a 1 in. (25.4mm) open-end or equivalent wrench on the adjusting arm bolt and pull on the wrench until the proper tension is achieved.
  5. Holding the alternator in place, tighten the adjusting arm bolt. Inspect the belt tension. When the belt is properly tensioned, tighten the alternator mounting bolt. Fig. 1: Alternator belt adjustment 86651054.gif
Power Steering Drive Belt ALL 6-CYLINDER AND 1971-72 V8 MODELS
  1. Holding a ruler perpendicular to the drive belt at its longest run, test the tightness of the belt by pressing it firmly with your thumb. The deflection should not exceed 1?4 in. (6mm).
  2. To adjust the belt tension, loosen the adjusting and mounting bolts on the front face of the steering pump cover plate (hub side).
  3. Using a prytool on the pump hub, move the power steering pump toward or away from the engine until the proper tension is reached. Do not pry against the reservoir as it is relatively soft and easily deformed.
  4. Hold the pump in place, tighten the adjusting arm bolt and then inspect the belt tension. When the belt is properly tensioned tighten the mounting bolts.
1973 AND LATER V8 MODELS
  1. Position a ruler perpendicular to the drive belt at its longest run. Test the tightness of the belt by pressing it firmly with your thumb. The deflection should be about 1?4 in. (6mm).
  2. To adjust the belt tension, loosen the three bolts in the three elongated adjusting slots at the power steering pump attaching bracket.
  3. Turn the steering pump drive belt adjusting nut as required until the proper deflection is obtained. Turning the adjusting nut clockwise will increase tension and decrease deflection; counterclockwise will decrease tension and increase deflection.
  4. Without disturbing the pump, tighten the three attaching bolts. Fig. 2: Power steering belt adjustment (slider type) 86651055.gif
Air Conditioning Compressor Drive Belt
  1. Position a ruler perpendicular to the drive belt at its longest run. Test the tightness of the belt by pressing it firmly with your thumb. The deflection should not exceed 1?4 in. (6mm).
  2. If the engine is equipped with an idler pulley, loosen the idler pulley adjusting boot, insert a prytool between the pulley and the engine (or in the idler pulley adjusting slot), and adjust the tension accordingly. If the engine is not equipped with an idler pulley, the alternator must be moved to adjust, as outlined under Alternator Drive Belt.
  3. When the proper tension is reached, tighten the idler pulley adjusting bolt (if so equipped) or the alternator adjusting and mounting bolts. Fig. 3: Air conditioning belt adjustment 86651056.gif
Thermactor® Air Pump Drive Belt
  1. Position a ruler perpendicular to the drive belt at its longest run. Test the tightness of the belt by pressing it firmly with your thumb. The deflection should be about 1?4 in. (6mm).
  2. To adjust the belt tension, loosen the adjusting arm bolt slightly. If necessary, also loosen the mounting belt slightly.
  3. Using a prytool, pry against the pump rear cover to move the pump toward or away from the engine as necessary. WARNING
    Do not pry against the pump housing itself, as damage to the housing may result.
  4. Holding the pump in place, tighten the adjusting arm bolt and recheck the tension. When the belt is properly tensioned, tighten the mounting bolt. Fig. 4: Air pump adjustment points 86651057.gif
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Nov 12, 2010 | 1988 Mercury Grand Marquis

1 Answer

How to change the power steering belt on a 2004 mitsubishi galant


The power steering belt is on the front of the motor and is driven by the crankshaft. Below the steering pump is an adjuster bolt. It moves a pulley underneath the pump. To adjust the belt tension located the nut that tightens the adjuster pulley the the pump bracket . It is on the right side of the bracket , the pulley is on the left facing the back of the car. Loosen the pulley mount nut . You can now turn the adjuster bolt to move the pulley to tighten and loosen the belt for replacement. I recommend replacing the alternator belt at the same time. To do this , Unhook the negative battery cable, loosen the bolt holding block to the slide arm, reach under the alternator and loosen the lower mount bolt, not you can adjust the position of the alternator using the adjuster bolt.

Oct 02, 2010 | 2004 Mitsubishi Galant

1 Answer

Where is the tension pully on a 1993 ford taurus 3.0 motor


there is no spring tensioner on some of the 3.0 engines. See instructions below. I will paste a pic on the version that DOES have a tensioner at the bottom of this post.

3.0L Engine-Except SHO
ALTERNATOR BELT WITHOUT AUTOMATIC TENSIONER

  1. Loosen the adjusting arm and pivot bolts.
  2. Turn the alternator belt adjusting screw counterclockwise until the old belt can be removed.
  3. Remove the belt.

To install:
  1. Install the new belt over the pulleys. Check that all the V-grooves make proper contact with the pulleys.
  2. Adjust the belt tension, then tighten the adjusting arm and pivot bolts.

3.0L SHO Engine
ALTERNATOR BELT
See Figure 2
  1. Loosen the nut in the center of the idler pulley.
  2. Loosen the idler adjusting screw until the old belt can be removed, then remove the belt.

To install:
  1. Install the new belt over the pulleys in proper contact with the pulleys.
  2. Adjust the new belt to specifications as follows: Turn the idler pulley nut to the right to tighten the belt to a specification of 220-265 lbs. (980-1180 N). Torque the idler pulley nut to 25-37 ft. lbs. (34-50 Nm).

POWER STEERING AND AIR CONDITIONING BELT
See Figure 2
  1. Remove the alternator belt.
  2. Loosen the nut on the tensioner pulley.
  3. Turn the belt adjusting screw on the tensioner counterclockwise until the belt can be removed, then remove the belt.

To install:
  1. Position the new belt over the proper pulleys, making sure the V-grooves are properly seated.
  2. Install the alternator belt.
  3. Adjust the power steering and air conditioning belt to a specification of 154-198 lbs. (690-980 N) with a belt tension gauge.
  4. Adjust the alternator belt.
3.0L Engine (Except SHO) and 3.8L Engine
VEHICLES THROUGH 1993 WITH AUTOMATIC TENSIONER

See Figures 4 and 5
  1. Insert a 1 / 2 in. breaker bar into the square hole in the tensioner.

On the 3.8L engine, the tensioner has a1/2in. square hole cast into the rear of the tension arm directly behind the pulley. On the 3.0L engine, the1/2in. square hole is cast into the spring housing on the front of the tensioner.
  1. Rotate the tensioner clockwise and remove the belt.

e31142e.gif

Fig. Fig. 5: 3.8L belt schematic-1993 shown


To install:

  1. Install the drive belt over all the pulleys, except for the alternator pulley on the 3.0L engine for vehicles through 1992, or the idler pulley for 1993 3.0L vehicles.
  2. Rotate tensioner counterclockwise and install the belt over the alternator pulley. Make sure that all the V-grooves make proper contact with the pulleys.
  3. On the 3.0L engine, install the alternator belt for vehicles through 1992.
  4. For 1993 3.0L vehicles, install the drive belt over the idler pulley.

Oct 01, 2010 | 1993 Ford Taurus

1 Answer

How to change alternator belt


914d651.gif
alternator and air conditioning compressor
  1. Disconnect the negative battery cable.
  2. Loosen the idler pulley bolt.


The replacement of the inner belt on multi-belted engines may require the removal of the outer belts.
To replace a drive belt, loosen the adjusting and mounting bolts of the component which the belt is driving. Move the component inward to relieve the tension on the drive belt.
Slip the belt off the component pulley and match the new belt with the old belt for length and width. The old belt will be slightly longer. After a new belt is installed correctly, adjust the tension.
  1. Turn the adjustment bolt at the top of the idler pulley bracket. Clockwise rotation will tighten the belt; counterclockwise will loosen it.
  2. Keep the idler pulley bolt snug (but not tight) while adjusting belt tension. The adjustment bolt should turn with moderate force.

After adjustment is satisfactory, tighten the idler pulley bolt, and then tighten the adjustment bolt.


Reconnect the negative battery cable.

When replacing more than 1 belt, it is a good idea to make note or mark what belt goes around what pulley; this will make installation easier if you mix up the belts.

Sep 25, 2010 | 1997 Nissan Maxima

1 Answer

How to tighten belt on 2004 nissan quest


Best to remove the front passenger side wheel. Then snap out the clips that are holding the plastic cover towards the front. Now it will expose the belt area. Loosen the locking nut of the tensioner(idler) pulley located to the right of the Crankshaft Pulley. Crankshaft pulley is the one that handles both belts (alternator and the power sterring pump). Right to that next to it, upwards is the idler pulley. You will find the alternator pulley to the right of that further up. Open the hood of the van and locate the adjusting nut behind the alternator on the idler pulley from top and loosen that as well. Once both these are loosened, belt will loosen and will be easy to remove. Now replace it with the new belt the same way it was wrapped. Go over the crankshaft pulley; under the A/C compressor pulley; over the alternator pulley; under the idler pulley. tighten the adjusting nut from the top through the hood until the play on the belt (when pressed in) is less than 1 inch. Now lock the tensioner pulley by tightening the locking nut. Start and run the car for 15 mins to see if everything is ok.

Jul 28, 2010 | 2004 Nissan Quest

1 Answer

Fanbelt


MORE INFORMATION NEEDED. There are several deices to adjust belts. On serpentine belts there is a tensioner pulley that should hold spring applied pressure on the belt. If that doesn't work it needs to be replaced. On some engines it is tightened by adjusting an idler pulley. On some it is accomplished by adjusting the alternator or power steering pump. Look to see which part has an adjustment and loosen the nut or bolt holding it, move the part to the desired tension and tighten the nut or bolt.

Dec 15, 2009 | Cars & Trucks

1 Answer

Changing V belts on Nissan Frontier 2002 4cyl


That should be right if it is an idler pulley. On belts that do not have idler pulley you will have to loosen lock bolt on adjuster. Like alternator

Mar 23, 2009 | 2002 Nissan Frontier Crew Cab

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