Honda Prelude Accord Civic S2000 2001-2006

Accessory Drive Belts

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Accessory Belt Routing





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Fig. Accessory drive belt routing-1.7L engine



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Fig. Accessory drive belt routing-2.0L engine, except 2006 Civic



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Fig. Accessory drive belt routing-1.8L engine



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Fig. Accessory drive belt routing-2.2L and 2.3L engines without A/C



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Fig. Accessory drive belt routing-2.2L and 2.3L engines with A/C



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Fig. Accessory drive belt routing-2006 Civic with 2.0L engine



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Fig.



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Fig. Accessory drive belt routing-3.0L engine

Adjustment



2001-02 Accord & Prelude

The 2.2L and 2.3L engines utilize two multi-ribbed V-belts. One belt is used to drive both the alternator and air conditioner compressor and a separate belt is used for the power steering pump.


CAUTION
Always disable the power to the vehicle by disconnecting the negative battery cable before checking, replacing or adjusting the drive belts. Working with the drive belts requires placing tools, hands and fingers near areas of potential danger. In addition, the cooling fan could engage even with the ignition in the OFF position.

Alternator & Air Conditioner Belt

The air conditioner compressor is mounted to the engine and cannot be moved, thus the belt is tensioned by moving the alternator which has two fasteners securing it to a bracket mounted on the engine. The lower lock nut and fastener are installed through a slotted bracket and the upper fastener allows the alternator to pivot.

To adjust the belt, perform the following:

  1. Note the radio security code and disconnect the negative battery cable.
  2.  
  3. Loosen the upper pivot nut and lower locknut.
  4.  
  5. Move the alternator by turning the adjustment bolt on the lower bracket. Turning the adjustment bolt clockwise increases the belt tension, conversely, turning the adjustment bolt counterclockwise will decrease the belt tension.
  6.  
  7. Tighten the upper pivot bolt and lower locknut and then check the belt tension. If the belt tension is not within specification, repeat the previous procedures until the proper belt tension is achieved.
  8.  
  9. Reconnect the negative battery cable and enter the radio security code.
  10.  

Power Steering Pump Belt

The power steering pump has two fasteners securing it to a bracket mounted on the engine. The upper lock nut and fastener are installed through a slotted bracket and the lower fastener allows the pump to pivot.

To adjust the belt, perform the following:

  1. Note the radio security code and disconnect the negative battery cable.
  2.  
  3. Loosen the upper locknut and lower pivot nut.
  4.  
  5. Move the pump by turning the adjustment bolt on the upper bracket. Turning the adjustment bolt clockwise increases the belt tension, conversely, turning the adjustment bolt counterclockwise will decrease the belt tension.
  6.  
  7. Tighten the upper locknut, lower pivot bolt, and then check the belt tension. If the belt tension is not within specification, repeat the previous procedures until the proper belt tension is achieved.
  8.  
  9. Reconnect the negative battery cable and enter the radio security code.
  10.  

2003-06 Accord

Belt tension is maintained by an automatic tensioner. No adjustment is necessary or possible.

Civic
2001-05 Alternator Belt (Without A/C)

Belt Tension Gauge Method


NOTE
This procedure requires Belt tension gauge 07JGG-001010A, or equivalent belt tension gauge.

  1. Attach the belt tension gauge to the belt and measure the tension. Follow the gauge manufacturer's instructions. If the belt is worn or damaged, replace it. If the belt needs adjustment, go to step 2.
    1. Used Belt: 77-110 lbs. (340-490 N)
    2.  
    3. New Belt: 120-170 lbs. (540-740 N)
    4.  

  2.  
  3. Loosen the mounting bolt (A), lock bolt (B), and lower bracket mounting bolt (C).
  4.  
  5. Torque the mounting bolt to 14 ft. lbs. (20 Nm).
  6.  
  7. Turn the adjusting bolt (D) to obtain the proper belt tension, then retighten the lock bolt, mounting bolt, and lower bracket mounting bolt.
  8.  
  9. Recheck the belt tension.
  10.  
  11. If you installed a new belt, run the engine for 5 minutes, then readjust the belt to the used belt specification.
  12.  
  13. Check the power steering pump belt adjustment.

    Click image to see an enlarged view

    Fig. Adjusting the belt using a belt tension gauge

  14.  

Deflection Method

  1. Apply a force of 22 lbs. (98 N), and measure the deflection at the mid point (A) between the alternator and crankshaft pulley. If the belt is worn or damaged, replace it. If the belt needs adjustment, go to step 2.
    1. Used belt: 0.33-0.43 in. (8.5-11.0mm)
    2.  
    3. New belt: 0.26-0.33 in. (6.5-8.5mm)
    4.  

  2.  
  3. Loosen the mounting bolt (B), lock bolt (C), and lower bracket mounting bolt (D).
  4.  
  5. Torque the mounting bolt to 14 ft. lbs. (20 Nm).
  6.  
  7. Turn the adjusting bolt (E) to obtain the proper belt tension, then retighten the lock bolt, mounting bolt, and lower bracket mounting bolt.
  8.  
  9. Recheck the belt tension.
  10.  
  11. If you installed a new belt, run the engine for 5 minutes, then readjust the belt to the used belt specification.
  12.  
  13. Check the power steering pump belt adjustment.

    Click image to see an enlarged view

    Fig. Checking the belt tension using the deflection method

  14.  

2001-05 Alternator-A/C Comressor Belt

Belt Tension Gauge Method


NOTE
This procedure requires Belt tension gauge 07JGG-001010A, or equivalent belt tension gauge.

  1. Attach the belt tension gauge to the belt, and measure the tension. Follow the gauge manufacturer's instructions. If the belt is worn or damaged, replace it. If the belt needs adjustment, go to step 2.
    1. Used belt: 88-120 lbs. (390-540 N)
    2.  
    3. New belt: 190-220 lbs. (830-980 N)
    4.  

  2.  
  3. Loosen the mounting bolt (A), lock bolt (B), and lower bracket mounting bolt (C).
  4.  
  5. Torque the mounting bolt to 14 ft. lbs. (20 Nm).
  6.  
  7. Turn the adjusting bolt (D) to obtain the proper belt tension, then retighten the lock bolt, mounting bolt, and lower bracket mounting bolt.
  8.  
  9. Recheck the belt tension.
  10.  
  11. If you installed a new belt, run the engine for 5 minutes, then readjust the belt to the used belt specification.
  12.  
  13. Check the power steering pump belt adjustment.

    Click image to see an enlarged view

    Fig. Adjusting the belt using a belt tension gauge

  14.  

Deflection Method

  1. Apply a force of 22 lbs. (98 N), and measure the deflection at the mid point (A) between the alternator and crankshaft pulley. If the belt is worn or damaged, replace it. If the belt needs adjustment, go to step 2.
    1. Used belt 0.33-0.43 in. (8.5-11.0mm)
    2.  
    3. New belt: 0.20-0.26 in. (5.0-6.5mm)
    4.  

  2.  
  3. Loosen the mounting bolt (B), lock bolt (C), and lower bracket mounting bolt (D).
  4.  
  5. Torque the mounting bolt to 14 ft. lbs. (20 Nm).
  6.  
  7. Turn the adjusting bolt (E) to obtain the proper belt tension, then retighten the lock bolt, mounting bolt, and lower bracket mounting bolt.
  8.  
  9. Recheck the belt tension.
  10.  
  11. If you installed a new belt, run the engine for 5 minutes, then readjust the belt to the used belt specification.
  12.  
  13. Check the power steering pump belt adjustment.

    Click image to see an enlarged view

    Fig. Checking the belt tension using the deflection method

  14.  

2001-05 Power Steering Pump Belt

Belt Tension Gauge Method


NOTE
This procedure requires Belt tension gauge 07JGG-001010A, or equivalent belt tension gauge.

  1. Remove the P/S reservoir from the bracket, and set it aside.
    NOTE
    Remove the belt tension gauge carefully to avoid hitting the gauge reset lever.

  2.  
  3. Attach the belt tension gauge to the belt, and measure the tension of the belt. Follow the gauge manufacturer's instructions. If the belt is worn or damaged, replace it.
    1. Used belt: 88-121 lbs. (390-540 N)
    2.  
    3. New belt: 165-198 lbs. (740-880 N)
    4.  

  4.  
  5. If you installed a new belt, run the engine for 5 minutes, then readjust the belt to the used belt specification.

    Click image to see an enlarged view

    Fig. Checking the belt tension with a belt tension gauge

  6.  
  7. Loosen the power steering pump mounting nut (A) and pump locknut (B).
  8.  
  9. Turn the adjusting bolt (C) to get the proper belt tension, then retighten the mounting nut and locknut.
  10.  
  11. Start the engine and turn the steering wheel from lock-to-lock several times, then stop the engine and recheck the tension of the belt.

    Click image to see an enlarged view

    Fig. Adjusting the power steering pump belt tension

  12.  

Deflection Method

  1. Apply a force of 22 lbs. (98 N) and measure the deflection between the power steering pump pulley (A) and the crankshaft pulley (B). If the belt is worn or damaged, replace it.
    1. Used belt: 0.51-0.65 in. (13.0-16.5mm)
    2.  
    3. New belt: 0.35-0.43 in. (9.0-11.0mm)
    4.  

  2.  
  3. If you installed a new belt, run the engine for 5 minutes, then readjust the belt to the used belt specification.

    Click image to see an enlarged view

    Fig. Checking the belt tension using the deflection method

  4.  
  5. Loosen the power steering pump mounting nut (A) and pump locknut (B).
  6.  
  7. Turn the adjusting bolt (C) to get the proper belt tension, then retighten the mounting nut and locknut.
  8.  
  9. Start the engine and turn the steering wheel from lock-to-lock several times, then stop the engine and recheck the tension of the belt.

    Click image to see an enlarged view

    Fig. Adjusting the power steering pump belt tension

  10.  

2006 Models

Belt tension is maintained by an automatic tensioner. No adjustment is necessary or possible.

S2000

Belt tension is maintained by an automatic tensioner. No adjustment is necessary or possible.

Inspection



The maintenance intervals suggested by the manufacturer vary by time, operating conditions (normal or severe), and mileage. A good rule of thumb is to inspect the drive belts every 15,000 miles (24,000 km) or 12 months (whichever occurs first). On manually adjusted multi-ribbed V-belts, measure the belt tension at a point halfway between the pulleys by pulling or pressing on the belt with a known force and measuring how far the belt moves, referred to as the amount of deflection. Note that deflection is not free-play, but the ability of the belt, under actual tension, to stretch slightly and give. The specification for measuring belt tension includes the amount of force applied to the belt, and the amount of defection (movement) the belt should have when the force is applied. The amount of deflection varies depending on whether the belt is new or used. Although the manufacturer markets a specific tool for measuring belt deflection, a fisherman-s spring scale capable of measuring a 22 lb. (98 N) pull and a small ruler can be substituted for this tool.

Inspect the belts for the following signs of damage or wear: glazing, cracking, fraying, crumbling or missing chunks. A glazed belt will be slightly brittle and perfectly smooth from slipping, and may exhibit a screeching noise when the engine is suddenly accelerated or first started. A good belt will have a slight texture of fabric visible and the surface should be soft and flexible. Cracks will usually start at the inner edge of a belt and run outward. A belt that is fraying will have the fabric backing de-laminating itself from the belt. A belt that is crumbling or missing chunks will have missing pieces in the cross-section of the belt, some times these chunks will be stuck in the pulley groove and not easily seen. All worn or damaged drive belts should be replaced immediately. It is best to replace all drive belts at one time, as a preventive maintenance measure.

Although it is generally easier on a component to have the belt too loose than too tight, a loose belt may place a high impact load on a bearing due to the whipping or snapping action of the belt. A belt that is slightly loose may slip, especially when component loads are high. This slippage may be hard to identify. For example, the generator belt may run okay during the day, and then slip at night when headlights are turned on. Slipping belts wear quickly not only due to the direct effect of slippage but also because of the heat a slipping belt generates. Extreme slippage may even cause a belt to burn. A very smooth, glazed appearance on the belt's sides, as opposed to the obvious pattern of a fabric cover, indicates that the belt has been slipping.

Both multi-ribbed V-belts and serpentine belts can be checked for wear by inspecting the physical condition of the belt. To check belt stretch on multi-ribbed V-belts, look at the amount of adjustment that remains on the sliding portion of the adjustment bracket, or the threaded portion of the adjustment screw. If the adjustment range has is at its fully extended portion, the belt should be replaced.

Serpentine drive belts should be inspected for rib chunking (pieces of the ribs breaking off), severe glazing, frayed cords or other visible damage. Any belt which is missing sections of 2 or more adjacent ribs which are 1 / 2 in. (13mm) or longer must be replaced. You might want to note that serpentine belts do tend to form small cracks across the backing. If the only wear you find is in the form of one or more cracks are across the backing and NOT parallel to the ribs, the belt is still good and does not need to be replaced.

To check belt stretch on a serpentine belt, look at the range indicator on the tensioner assembly. The tensioner arm has a pointer that is compared to a small rectangular reference block on the tensioner mounting bracket. If the tensioner pointer has reached or is beyond the edge of the inspection block, the belt has stretched beyond its wear limits and should be replaced.

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Fig. An example of a healthy conventional V belt



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



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



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Fig. Typical wear patterns for a serpentine drive belt



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Fig. View of damaged ribbed belt as it sits on a pulley



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Fig. Look for frayed edges of the belt

Removal & Installation



Serpentine Belts

NOTE
Refer to the Accessory Belt Routing Illustrations located earlier in this section for routing diagrams.

  1. Place a long-handled, boxed-end wrench or a belt tension release tool (A) on the drive belt auto-tensioner from above the engine. Slowly turn the wrench in the direction shown to release the tension, then remove the drive belt.
    WARNING
    This is a hydraulic type auto-tensioner; you must turn the wrench slowly.

  2.  
  3. Install the new belt in the reverse order of removal.

    Click image to see an enlarged view

    Fig. Removing the serpentine belt-2006 Civic with 1.8L engine and A/C shown



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    Fig. Removing the serpentine belt-2006 Civic with 2.0L engine shown



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    Fig. Move the auto tensioner (A) to remove the serpentine belt (B)-S2000



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    Fig. Move the auto-tensioner (A) using the belt tension release tool to relieve tension from the drive belt (B), and remove the drive belt-Accord with 2.4L engine



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    Fig. Move the auto-tensioner (A) using the belt tension release tool to relieve tension from the drive belt (B), then remove the drive belt-Accord with 3.0L engine

  4.  

V-Belts

NOTE
Refer to the Accessory Belt Routing Illustrations located earlier in this section for routing diagrams.

If a belt must be replaced, the driven unit or idler pulley must be loosened and moved to its extreme loosest position, generally by moving it toward the center of the engine. After removing the old belt, check the pulleys for dirt or built-up material, which could affect belt contact. Carefully install the new belt, remembering that it is new and unused; it may appear to be just a little too small to fit over the pulley flanges. Fit the belt over the largest pulley (usually the crankshaft pulley at the bottom center of the engine) first, then work on the smaller one(s). Gentle pressure in the direction of rotation is helpful. Some belts run around a third, or idler pulley, which acts as an additional pivot in the belt's path. It may be possible to loosen the idler pulley as well as the main component, making the job much easier. Depending on which belt(s) being changed, it may be necessary to loosen or remove other interfering belts to access the being replaced.

When buying replacement belts, remember that the fit is critical according to the length of the belt (diameter) and the width of the belt. The belt shape should match the shape of the pulley exactly. Belts that are not an exact match can cause noise, slippage and premature failure.

After the new belt is installed, draw tension on it by moving the driven unit or idler pulley away from the engine and tighten its mounting bolts. This is sometimes a three or four-handed job; and an assistant could be helpful. Make sure that all the bolts that have been loosened are retightened and that any other loosened belts have the correct tension. A new belt can be expected to stretch a bit after installation, so be prepared to readjust the new belt, if needed, within the first two hundred miles of use.

 
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