Question about 1991 Mercedes-Benz 300 Diesel

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How to remove belt tensioner on mb300 1991 - 1991 Mercedes-Benz 300 Diesel

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Lock nut should be accessable from the front, loosen it and then from the top take tension of the belt by loosening the unit. Once belt in off remove front cover and unbolt from the car and remove. There is a red/orange locktite that holds them in so they will be tough at first and usually wont turn easy on the way out.

Posted on May 10, 2010

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Serpentine belt


BELT ROUTING DIAGRAM 1997 Mercury Sable 3.0L SFI 6cyl The Belt Routing Diagram

0900c1528025fc65.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 16: Rotate the belt tensioner and...


0900c1528025fc66.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Fig. 17: ... remove the belt from around one of the pulleys to remove the belt

WARNING Use caution when removing or installing the belt and make sure the tool does not slip from the drive belt tensioner or personal injury or damage to the belt tensioner and the belt may occur.

  1. Attach a 15mm socket or wrench to the bolt attaching the tensioner pulley.
  2. On all 3.0L (OHV) engines, rotate the drive belt tensioner clockwise to relieve belt tension and slide the belt off the pulleys.
  3. On 3.0L (DOHC) engines, rotate the tensioner counterclockwise to relieve belt tension and slide the belt off the pulleys.

To install:
  1. Install the drive belt on all the pulleys except the tensioner pulley.
  2. Rotate the belt tensioner as outlined in the removal procedure to relieve belt tension and install the belt onto the tensioner pulley. Make sure the V-grooves make proper contact with the pulleys. Make sure the spring keeper releases or improper belt tension will occur.

Aug 05, 2012 | 1997 Mercury Sable

1 Answer

Need diagram for installation of a serpetine belt for 2005 Toyota Tacoma P/U 4.0. Please advise. Thanks


  1. REMOVE ENGINE UNDER COVER SUB-ASSEMBLY NO.1 (4WD AND PRE RUNNER DRIVE TYPE)
    1. Remove the 4 bolts, then remove the under cover No.1.
    2. dak408_42.gif
  • REMOVE FAN AND GENERATOR V BELT
    1. While releasing the belt tension by turning the belt tensioner counterclockwise, remove the V-ribbed belt from the belt tensioner.
  1. INSPECT V-RIBBED BELT TENSIONER ASSEMBLY
    1. Check that nothing gets caught in the tensioner by turning it clockwise and counterclockwise. If a malfunction exists, replace the tensioner.
    2. dak408_43.gif
    3. INSTALL FAN AND GENERATOR V BELT
    1. While turning the belt tensioner counterclockwise, align with its holes, and then insert a bar of 6 mm (0.24 inch) into the holes to fix the belt tensioner.
    2. Install the V-ribbed belt.
    3. While turning the belt tensioner counterclockwise, remove the bar.
    4. dak408_44.gif
    1. If it is hard to install the V-ribbed belt, perform the following procedure.
(1) Put the V-ribbed belt on all parts except the P/S pump, as shown in the illustration. (2) While releasing the belt tension by turning the belt tensioner counterclockwise, put the V-ribbed belt on the P/S pump.
  1. INSTALL ENGINE UNDER COVER SUB-ASSEMBLY NO.1 (4WD AND PRE RUNNER DRIVE TYPE)
    1. Install the engine under cover with the 4 bolts. Torque: 29 Nm (296 kgf-cm, 21 ft. lbs.)

Nov 21, 2010 | 2005 Toyota Tacoma

1 Answer

I am in the process to install a new alternator for which I need to loosen the belt. Is there a tensioner and what does it look like ?


Don't know what size of motor you have but this should help you:

Removal & Installation
  1. Loosen the accessory-to-mounting bracket bolt(s) and adjusting bolt.
  2. Rotate the accessory to relieve belt tension.
  3. Slip the drive belt from the accessory pulley and remove it from the engine.

If the engine uses more than one belt, it may be necessary to remove belts that are in front of the belt being removed

To install:



c17hydro_38.gif

If the engine uses more than one belt, it may be necessary to remove belts that are in front of the belt being removed


  1. Place the new belt over the crankshaft or drive pulley and stretch over the driven (accessory) pulley.
  2. If removed, install the other belts in the same way.
  3. Adjust the belts to the proper tension.
  4. Tighten the adjusting and mounting bolts.

Models equipped with the V6 engine and most 1987-94 engines use a single (serpentine belt) to drive all engine accessories. The serpentine belt driven accessories are rigidly mounted with belt tension maintained by a spring loaded tensioner assembly. The belt tensioner has the ability to control belt tension over a fairly broad range of belt lengths. However, there are limits to the tensioner's ability to compensate for varying lengths of belts. Poor tension control and/or damage to the tensioner could result with the tensioner operating outside of its range.

To replace the belt push (rotate) the the belt tensioner and remove the belt. Use a 15mm socket on the 4-cyl. engines and a 3/4 in. open end wrench on the V6 engines.
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Nov 20, 2010 | 1989 Chevrolet Cavalier

1 Answer

Change timing belt galant 04 mivec 2.4


49885ff.gif
Timing belt “B” (balancer belt) and related components—2004–2005 Galant and 2004–2005 Lancer 2.4L engine


  1. Disconnect the negative battery cable. Remove the engine under cover.
  2. Remove the crankshaft damper pulley.
  3. Disconnect the control wiring harness connector, battery wiring harness connector and connector bracket to engine mounting insulator.
  4. Remove the harness bracket. Remove the upper timing belt cover. Remove the water pump pulley. Remove the idler pulley.
  5. Remove the auto tensioner. Remove the lower timing belt cover.
  6. Turn the crankshaft clockwise and align each timing mark to set the number one piston to TDC of its compression stroke.
  7. Remove the timing belt under cover rubber plug and then install special tool MD998738. Screw the special tool until it contacts the timing belt tensioner arm.

    NOTE The special tool must be screwed in gradually at the rate of a 30 degree turn per second. If it is screwed in all at once, the timing belt tensioner adjuster rod will not easily retract and the tool may bend.

  8. Gradually screw in the special tool and then align the timing belt tensioner adjuster rod set hole “A” with the timing belt tensioner adjuster cylinder set hole “B”.
  9. Insert a wire or pin in the set holes to lock the assembly in place. After removing the special tool, loosen the timing belt tensioner pulley mounting bolts and remove the timing belt. If the belt is being reused be sure to mark the direction of rotation (clockwise) on the belt.
  10. Remove the timing belt tensioner pulley, tensioner arm and adjuster.
  11. Remove the timing belt idler pulley. Remove the timing belt lower cover bracket. Remove the crankshaft position sensor.
  12. Remove the crankshaft pulley center bolt and washer. Remove the drive sprocket. Remove the crankshaft angle sensing blade.
  13. Remove the balancer timing belt tensioner. Remove the timing belt “B” (balancer belt) from its mounting.


284eb62.gif
Timing belt tensioner adjuster rod set hole “A” and cylinder set hole “B”—2004–2005 Galant and 2004–2005 Lancer 2.4L engine

To install:


78b2d67.gif
Belt tension checking—2004–2005 Galant and 2004–2005 Lancer 2.4L engine


b8fcecc.gif
Cylinder block plug location—2004–2005 Galant and 2004–2005 Lancer 2.4L engine


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Timing belt sprocket alignment—2002–2004–2005 Galant and 2004–2005 Lancer 2.4L engine

Feb 27, 2010 | 2004 Mitsubishi Galant

1 Answer

How do i loosen the auto tensioner on my 02 civic si


2002 Honda Civic SI 2.0L MFI VTEC DOHC 4cyl
  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. Install the new belt in the reverse order of removal.
9d15e8d.jpg

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

47af0c8.jpg


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

477996f.jpg

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

af364c4.jpg

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

I hope helps with this. Good luck.

Dec 29, 2009 | 2002 Honda Civic

1 Answer

How do i loosen the belt to get the alternater off


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Accessory Drive Belt Tensioner
Removal & Installation To Remove:
  1. Rotate the accessory drive belt tensioner clockwise.
  2. Remove the accessory drive belt.
  3. Remove the accessory drive belt tensioner bolts.
  4. Remove the accessory drive belt tensioner.
To Install:
  1. Install the accessory drive belt tensioner.
  2. Install the accessory drive belt tensioner bolts. Tighten to 18 ft-lb (25 Nm).
  3. Install the accessory drive belt.
  4. Rotate the accessory drive belt tensioner counterclockwise.

Oct 26, 2009 | 1998 Lincoln Navigator

1 Answer

Cant find 97 ford taurus serpentine belt diagram


Drive Belt Replacement ani_caut.gif WARNING: IF EQUIPPED, DO NOT ALLOW DRIVE BELT TENSIONER (6B209) TO SNAP BACK AS DAMAGE TO DRIVE BELT TENSIONER OR PERSONAL INJURY COULD RESULT.
NOTE: Minor cracks in the V-grooved portion of the serpentine drive belt (8620) are considered normal and acceptable. If the drive belt has chunks missing from the ribs, the drive belt should be replaced.

NOTE: Conditions requiring drive belt replacement are excessive wear, rib chunk-out, severe glazing, frayed cords or other conditions. Replace any drive belt exhibiting any of these conditions.

NOTE: When installing drive belt on pulley, make sure that all V-grooves make proper contact with pulleys.



q1834c.gif

Drive Belt, Serpentine—Except SHO
Removal
  1. ani_caut.gif WARNING: USE CAUTION WHEN REMOVING OR INSTALLING DRIVE BELT TO MAKE SURE THAT TOOL DOES NOT SLIP FROM DRIVE BELT TENSIONER OR PERSONAL INJURY AND/OR DAMAGE TO DRIVE BELT TENSIONER AND DRIVE BELT MAY OCCUR.
    Using a 15 mm socket or wrench on bolt attaching drive belt tensioner pulley, rotate drive belt tensioner clockwise on 3.0L (2V) and 3.0L (2V) FF, rotate the drive belt tensioner counter clockwise on 3.0L (4V) to remove drive belt from pulleys. Make sure spring keeper engages into slot.


    Drive Belt Tensioner—3.0L (4V)


    q3759a.gif

Installation
  1. Install drive belt over all pulleys (except drive belt tensioner).
  1. Rotate drive belt tensioner as described under the removal procedure and install drive belt over drive belt tensioner pulley. Make sure that all V-grooves make proper contact with pulleys. Make sure spring keeper releases or improper belt tension will occur.


    Pulley, Routing—Accessory Drive Belt 3.0L (2V)/3.0L (2V) FF Engine


    q3244d.gif


    Item Part Number Description 1 10300 Generator 2 6C348 Idler Pulley 3 3A674 Power Steering Pump 4 19703 A/C Compressor 5 6312 Crankshaft Pulley 6 6B209 Drive Belt Tensioner 7 8501 Water Pump 8 8620 Drive Belt

    Pulley, Routing—Accessory Drive Belt 3.0L (4V)


    q3735a.gif


    Item Part Number Description 1 3A674 Power Steering Pump 2 8501 Water Pump 3 19703 A/C Compressor 4 8620 Drive Belt 5 6312 Crankshaft Pulley 6 6B209 Drive Belt Tensioner 7 10300 Generator
3.4L SHO Engine
Removal
  1. Remove the right front wheel and tire assembly. For additional information, refer to Section 04-04.
  1. Remove the inner fender splash shield.
  1. Remove the alternator shield.
  1. ani_caut.gif WARNING: USE CAUTION WHEN REMOVING OR INSTALLING DRIVE BELT TO MAKE SURE WRENCH DOES NOT SLIP FROMDRIVE BELT TENSIONER OR POSSIBLE PERSONAL INJURY AND/OR DAMAGE TO DRIVE BELT TENSIONER AND DRIVE BELT MAY OCCUR.
    Using a 3/8 inch ratchet on the lifting lug, rotate drive belt tensioner counterclockwise (upward) and engage spring keeper. Remove drive belt from drive belt tensioner.
  1. Lower vehicle.
  1. Remove drive belt.
Installation
  1. Install drive belt over all pulleys (except drive belt tensioner ).
  1. Raise vehicle on hoist.
  1. Rotate drive belt tensioner , as described under Removal procedure and install drive belt over drive belt tensioner pulley. Make sure all V-grooves make proper contact with pulleys. Make sure the spring keeper is released or improper belt tension will occur.
  1. Install the alternator shield.
  1. Install the inner fender splash shield.
  1. Install the wheel and tire assembly. For additional information, refer to Section 04-04.


    Pulley Routing—Accessory Drive Belt, 3.4L SHO


    q3736a.gif


    Item Part Number Description 1 3A733 Power Steering Pump Pulley 2 6B217 (RH) Idler Pulley 3 19703 A/C Compressor 4 8620 Drive Belt 5 6312 Crankshaft Pulley 6 6B209 Drive Belt Tensioner 7 10346 Generator 8 6B217 (LH) Idler Pulley 9 6B217 (Center) Idler Pulley
Drive Belt, Water Pump
Removal
  1. NOTE: If removal of the water pump drive pulley is required, refer to Section 03-03.

    Rotate drive belt tensioner clockwise by hand and remove drive belt from drive belt tensioner .
  1. Remove drive belt from water pump drive pulley and water pump pulley.
Installation
  1. Position drive belt onto water pump drive pulley and water pump pulley.
  1. Rotate drive belt tensioner clockwise by hand and install drive belt over top of drive belt tensioner pulley. Make sure all V-grooves make proper contact with pulleys.


    Pulley Routing—Water Pump Drive Belt


    q3737a.gif


    Item Part Number Description 1 6B209 Drive Belt Tensioner 2 6A312 Crankshaft Pulley 3 8501 Water Pump 4 8620 Drive Belt

Jun 01, 2009 | 1997 Ford Taurus

1 Answer

A/c problem


Air Conditioning Belt
  1. Remove the accessory drive belt.
  2. Raise and suitably support the vehicle.
  3. Remove the engine shield bolts.
  4. Remove the engine shield.
  5. Install a ratchet into the air conditioning (A/C) belt tensioner adapter opening.
  6. Rotate the A/C belt tensioner clockwise in order to relieve tension on the belt.
  7. Remove the A/C belt from the pulleys.
  8. Slowly release the tension on the A/C belt tensioner.
  9. Remove the ratchet from the A/C belt tensioner.
  10. Clean and inspect the belt surfaces of all the pulleys.

    0900c1528024920d.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Location of air conditioning belt tensioner-4.8L, 5.3L, 6.0L Engine

Apr 08, 2009 | 2000 Chevrolet Silverado 1500

1 Answer

How to replace a/c belt on a silverado 1500 2000


Air Conditioning Belt
  1. Remove the accessory drive belt.
  2. Raise and suitably support the vehicle.
  3. Remove the engine shield bolts.
  4. Remove the engine shield.
  5. Install a ratchet into the air conditioning (A/C) belt tensioner adapter opening.
  6. Rotate the A/C belt tensioner clockwise in order to relieve tension on the belt.
  7. Remove the A/C belt from the pulleys.
  8. Slowly release the tension on the A/C belt tensioner.
  9. Remove the ratchet from the A/C belt tensioner.
  10. Clean and inspect the belt surfaces of all the pulleys.

    0900c1528024920d.jpg enlarge_icon.gifenlarge_tooltip.gifFig. Location of air conditioning belt tensioner-4.8L, 5.3L, 6.0L Engine

Apr 08, 2009 | 2000 Chevrolet Silverado 1500

1 Answer

What tools do I need to remove both engine belts from my wife's 2004 Concorde.do I need ome special tensioner tool to move the tensioner the other belt is a regular v belt and it goes around the...


2.7L & 3.5L Engines same Tools & Procedure Rate Me Please 1/2 in. breaker bar & Special Tool 7198 for conventional V-belts and Poly-V belts
  1. REMOVAL
    AIR CONDITIONING BELT

    NOTE: The A/C drive belt self tensioner is NOT a dynamic tensioner. After adjustment the tensioner bracket bolts are tightened. The torsion spring is no longer responsible for tensioning the A/C belt. The torsion spring is only used for initial belt tensioning.
    1. Remove generator/power steering belt to gain access to A/C belt. Refer to GENERATOR/POWER STEERING BELT for procedure.

    1. Loosen BUT DO NOT REMOVE tensioner locking bolt and pivot bolt (Fig. 2).
    2. Insert 1/2" drive breaker bar into square opening on belt tensioner. Rotate tensioner counterclockwise until belt can be removed from pulleys (Fig. 2).
    3. Slowly rotate tensioner clockwise to relieve spring load.
    CLEANING
    Clean all foreign debris from belt pulley grooves. The belt pulleys must be free of oil, grease, and coolants before installing the drive belt.

    INSPECTION
    Belt replacement under any or all of the following conditions is required:
    • Excessive wear
    • Frayed cords
    • Severe glazing
  • Poly-V Belt system may develop minor cracks across the ribbed side (due to reverse bending). These minor cracks are considered normal and acceptable. Parallel cracks are not (Fig. 3).

    NOTE:
    Do not use any type of belt dressing or restorer on Poly-V Belts. INSTALLATION

    AIR CONDITIONING BELT - NEW

    WARNING: DO NOT REMOVE A/C BELT TENSIONER LOCKING BOLT WITHOUT FIRST HOLDING THE TENSIONER WITH A 1/2" DRIVE BREAKER BAR, AS PERSONAL INJURY COULD RESULT.
NOTE: Verify that torsion spring position is in the new belt position before installing a NEW belt (Fig. 4). If torsion spring is not in the new belt position, follow steps 1-7 to change the tensioner spring from the USED belt position to the NEW belt position.
  1. Insert a 1/2" drive breaker bar into the square opening on the tensioner. Hold counterclockwise pressure on tensioner while removing the locking bolt (Fig. 2).
  2. Carefully release spring load of the torsion spring on the tensioner.
  3. Remove pivot bolt, tensioner, and spring from front timing cover.
  4. Insert spring arm into the NEW belt position on the tensioner (Fig. 4).
  5. Install torsion spring, tensioner, and pivot bolt.
  6. Install pivot bolt. Tighten only finger tight, at this time.
  7. Using a 1/2" drive breaker bar, apply counterclockwise pressure until locking bolt can be installed.
    1. Install the NEW belt by rotating the tensioner counterclockwise until the NEW belt can be installed on pulleys. See (Fig. 5) for belt routing.
    2. Release tensioner and remove breaker bar. Belt is automatically adjusted with the tensioner's torsion spring.
    3. Tighten tensioner locking bolt and pivot bolt to 28 Nm (250 in. lbs.) (Fig. 2).
    4. Install generator/power steering belt.
    AIR CONDITIONING BELT - USED

    NOTE: A "used belt" is considered having more than 500 miles of service use. NOTE: Perform steps 1-7 to change the tensioner spring from the NEW belt position, to the USED belt position.
    1. Insert a 1/2" drive breaker bar into the square opening on tensioner. Hold counterclockwise pressure on tensioner, while removing tensioner locking bolt (Fig. 2).
    2. Carefully release the tension of spring on tensioner.
    3. Remove pivot bolt, tensioner, and spring from front cover.
    4. Insert spring into the USED belt position on tensioner bracket (Fig. 4).
    5. Install spring, tensioner bracket, and pivot bolt.
    6. Install pivot bolt. Tighten only finger tight, at this time.
    7. Using a 1/2" drive breaker bar, apply counterclockwise pressure until locking bolt can be installed.
    8. Install the USED belt by rotating tensioner counterclockwise until belt can be installed on pulleys. See (Fig. 5) for belt routing.
    9. Release tensioner and remove breaker bar. Belt is automatically adjusted with the tensioner's torsion spring.
    10. Tighten tensioner locking bolt and pivot bolt to 28 Nm (250 in. lbs.) (Fig. 2).
    11. Install generator/power steering belt.
I Hope This is Of Help To YOU IF So PLEASE HELP ME RATE ME it Helps Thank You Very Much and Happy Motoring !!!!!!!!

Jan 21, 2009 | Chrysler Concorde Cars & Trucks

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