Question about 2003 Chevrolet Impala

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I replaced the alternator on a 2003 Impala and now the s-belt is making noise, how do I check the adjustment of the automatic tension system and adjust if necessary?

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  • Chevrolet Master
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You have an automatic tensioner that isn't tight enough? And you replaced the alternator, without loosening the belt in any way? Does the tensioner have a little piston on it, you know like gas filled? And you let it loose without putting the pin in it? I think it may have lost it's tension. The spring pressure alone is not enough to handle the belt. The piston is so tight that you can't move it with your hands. A new one comes preset with a pin like a grenade in it, and when you are all set, you pull the pin, and out it comes. Pressure. I don't know if you can test it, or tighten the belt somewhere, most cars have a pulley that moves or the power steering pump will slide over and pick up the tension. A good way to check is, you should not be able to twist the belt 45 degrees with your fingers. Hope this helps.

Posted on Sep 29, 2010

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My serpentine belt is a little bit loose. Do I tighten the belt using the tensioner or should I use the pry the alternator forward method?


The tensioner is an automatic device. You DONT Adjust it. Sounds like you need a new belt and probably should replace the tensioner. Tensioner have a limited lifespan usually 75000 to 100000 miles

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1 Answer

How can i replace serpentine belt


which one, accessories, or cam? oops cam is CHAIN>
accessories drive belt:
  1. make a drawing of routing.
  2. remove tension via adjuster or tension-er per FSM
  3. remove belt
  4. attach new belt per #1
  5. set tension to spec. stated in FSM. some are set real tight.
  6. done.
wow toy shows route on parts page, nice
note 2 belts on some engines
http://www.oemtoyotapartsgroup.com/a/Toyota_2003_Echo1500CC-16-VALVE-DOHC-EFI--AUTOMATIC2-DOOR/_52014_5774050/V-belt/160867-1605-141460.html

so when the mech opens hood, he looks for the tension method first;. (a real tensioner device or is it just the alternator slides.
etc.
this is first.
they used 3 alternators that year.

power steering pump adjuster
a/C compressor adjuster.
we look and see that in about, 1min flat.
so do that first.
there are some engines with stand alone tensioner devices
some are automatic others are manual set.
the FSM covers all this
if serious about DIY, why not buy one
or log into alldata.com for 15 bucks and read.




Oct 17, 2014 | 2003 Toyota ECHO

2 Answers

How to put a belt backon a 2006 sonata


You must loosen the belt tensioner to replace the belt, do not try and stretch the belt as it will be damaged. The alternator also have a setting bracket on to set the tension.

Jun 24, 2014 | 2003 Chevrolet Impala

1 Answer

2009 nissan altima is making a noise ...i think its the tension. has anyone ever heard of that?


older model altima need drive belt tension adjustment at 7500 miles intervals, the new models altimas has a automatic belt tensioner.i you hear noises belt tensioner could be failing.or could have leaking coolant getting on drive belt due to water pump gasket leaking or pump leaking.or alternator power steering pump could be failing many things will cause drive belt to make high squeak noises.

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1 Answer

Serpentine belt diagram for a 2003 Chevy unpalatable 4.3


Pop the hood of the car and locate the serpentine belt routing diagram. The diagram on the 2003 Chevrolet Impala is on top of the fan shroud. The diagram will be a picture of all of the accessory pulleys and how the serpentine belt is routed among the pulleys. This diagram will give you the exact direction for routing the new belt onto the pulleys. If you cannot find a serpentine belt routing diagram, take a notepad and pen and draw out the exact routing diagram of the old belt across the pulleys.

  • 2 Locate the serpentine belt tensioner. It is located below the alternator on the left front side of the engine. The tensioner on the 3.4 liter, 3.5 liter and the 3.9 liter engines will require a 3/8 ratchet to release the belt tensioner. The 3.8 liter engine will require a ratchet and a 15 mm socket for the belt tensioner. Rotate the belt tensioner clockwise to loosen and remove the belt from the belt tensioner pulley.
  • 3 Slide the old belt from the belt tensioner pulley. Remove the belt from the remaining pulleys and pull the belt from the engine compartment.
  • 4 Route the new belt across the crankshaft pulley first. The crankshaft pulley is the big pulley on the bottom of the engine in the center. Then route the serpentine belt across the remaining pulleys as directed by the serpentine belt routing diagram. Leave the belt tensioner pulley for last.
  • 5 Rotate the belt tensioner clockwise again to relieve the tension and slide the new belt across the top of the belt tensioner pulley. Release the belt tensioner and the belt will tighten up as the tensioner applies pressure to the belt. Make sure the new belt is properly seated in all the pulleys.
  • 6 Crank the engine and inspect the belt again to make sure that it stays seated in the pulleys.

  • Read more: How to Replace a Serpentine Belt on a 2003 Chevrolet Impala ' eHow.co.uk http://www.ehow.co.uk/how_6120665_replace-belt-2003-chevrolet-impala.html#ixzz1Yi6QLAjb

    Sep 21, 2011 | 2003 Chevrolet Impala

    1 Answer

    I own a 2003 Mitsubishi Galant 2.4L ES. When i turn my car on the Auxiliary belt makes a squealing noise for a bit then it stops. But it doesnt always make this noise, and it has something to do with...


    hi there, here is what i have found for you, i hope it helps:
  • Look at where the drive belts are located on your Mitsubishi Galant. Depending on models, you may need to jack up the vehicle to access the bolts for the belts.

  • Find the bolt assembly for the belt. This bolt structure will be on or near the main component that the belt serves. Look at all of the pulleys around which the belt winds, and you will find a bolt system to adjust tension. For an alternator belt, the bolt system is by the alternator. For a power steering belt, look near the power steering pump.
  • Find the lock nut that holds the long adjustment bolt in place and use your wrench to loosen it. This is the bolt the loosens the belt tension so that you can remove it.
  • Turn the adjustment bolt. Turning the adjustment bolt moves the component either toward the engine in order to loosen belt tension, or away from the engine in order to tighten belt tension.
  • Slip off the old belt and install the new one, once the belt tension is released. Make sure the belt is correctly seated on all pulleys.
  • Turn the adjustment bolt the other way to bring the component away from the engine and add belt tension. Test the belt for correct tension by pressing on it and checking deflection.
  • Tighten the adjustment lock bolt and the pivot bolt, when the belt has the right tension.
  • cheers

    iain

    Apr 27, 2011 | 2003 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 do u change a serpentine belt for a 1999 ford escort zx2


    ADJUSTMENT 1.8L Engines ALTERNATOR AND WATER PUMP BELT
    1. Loosen the alternator adjusting bolt.
    2. Raise and safely support the vehicle.
    3. Loosen the alternator mounting bolt. NOTE: Do not pry against the stator frame. Position the prybar against a stronger point, such as the area around a case bolt. Fig. 1: A belt tension gauge should be placed on the longest span of the belt to check tension — 1.8L engine 90981g05.gif

    4. Position a suitable belt tension gauge on the longest accessible span of belt and tighten the belt.
    5. Adjust the tension to 86–103 lbs. (383–461 N) for a new belt or 68–86 lbs. (304–383 kg) for a used belt.
    6. If a belt tension gauge is not available, adjust the tension to 0.31–0.35 in. (8–9mm) deflection for a new belt or 0.35–0.39 in. (9–10mm) deflection for a used belt.
    7. Tighten the alternator adjusting bolt to 14–19 ft. lbs. (19–25 Nm).
    8. Tighten the alternator mounting bolt to 27–38 ft. lbs. (37–52 Nm).
    9. Lower the vehicle. Fig. 2: Alternator and water pump pulley belt routing — 1.8L engine 90981g06.gif
    POWER STEERING PUMP BELT
    1. Raise and safely support the vehicle.
    2. Loosen the power steering pump mounting bolt and nuts.
    3. Adjust the power steering pump and, if equipped, the air conditioning compressor belt tension by turning the pump adjusting bolt. Fig. 3: Power steering pump belt routing and locations of the mounting bolts, nuts and adjusting nut — models without A/C 90981g07.gif

    4. Tighten the power steering pump mounting nut near the pump adjusting bolt.
    5. Position a suitable belt tension gauge on the longest accessible span of belt and tighten the belt.
    6. Adjust the tension to 110–132 lbs. (491–589 N) for a new belt or 95–110 lbs. (422–491 N) for a used belt.
    7. Check for proper belt deflection. For a new belt (one with less than 10 minutes of run time), the deflection should be 0.31–0.35 in. (8–9mm). For a used belt (one with more than 10 minutes of run time), the deflection should be 0.35–0.39 in. (9–10mm).
    8. Tighten the power steering pump mounting nut, located near the adjusting bolt, to 27–38 ft. lbs. (37–52 Nm).
    9. Tighten the pump mounting bolt behind the pulley to 27–40 ft. lbs. (36–54 Nm), and the remaining pump mounting nut to 23–34 ft. lbs. (31–46 Nm).
    10. Lower the vehicle. Fig. 4: Power steering pump belt routing and locations of the mounting bolts, nuts and adjusting nut — models with A/C 90981g08.gif
    1.9L Engines The accessory drive belt for 1.9L engines has no provision for manual belt adjustment, since these engines use an automatic belt tensioner. Drive belt slack is taken up by the automatic tensioner. NOTE: Movement of the automatic tensioner assembly during engine operation is not a sign of a malfunctioning tensioner. This movement is the tensioner self-adjusting and is required to maintain constant belt tension. Fig. 5: Drive belt routing — 1.9L engines 86751052.gif
    2.0L Engines The accessory drive belt for 2.0L engines has no provision for manual belt adjustment, since these engines use an automatic belt tensioner. Drive belt slack is taken up by the automatic tensioner. NOTE: Movement of the automatic tensioner assembly during engine operation is not a sign of a malfunctioning tensioner. This movement is the tensioner self-adjusting and is required to maintain constant belt tension. The belt tensioner has a belt length indicator. If the indicator marks are not between the MIN and MAX marks, the belt must be replaced. Fig. 6: Drive belt routing — 2.0L SOHC engine with A/C 90981g23.gif
    Fig. 7: Drive belt routing — 2.0L SOHC engine without A/C 90981g24.gif
    Fig. 8: Drive belt routing — 2.0L DOHC engine 90981g25.gif
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    Jul 16, 2010 | 1999 Ford Escort

    1 Answer

    How do you get the alternator back on 2003 2500


    The belt tension is automatically adjusted with the tennsioner pulley. As far as putting it back on, I am not sure what you mean, you just need to bolt it back up and pull the belt over the pulley.

    Oct 28, 2009 | 2003 Chevrolet Silverado 1500

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