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Question about 1998 GMC Suburban

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When driving the serpentine came off, checked the belt alls good. want to in stall a new one but want inspect to see the reason it came off, what should i be looking for besides the tentioner,how to t

How tell if its badwhat to look for

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jim sharp

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Spin each pulley individually make sure they are all straight and bearings are good and quite also make sure there is nothing loose that can make contact with the belt if any of the pulleys are loose or noisy or if they don't turn freely they will need to be replaced

Posted on Oct 31, 2015

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What would cause a serpentine belt on my 2000 Honda passport to keep coming off?

There could be several reasons why the serpentine belt on your 2000 Honda Passport is coming off, including:
  1. Loose or damaged tensioner: If the belt tensioner is loose or damaged, it can cause the belt to slip off.
  2. Worn or damaged pulleys: Worn or damaged pulleys can cause the belt to slip, resulting in belt failure.
  3. Misaligned or loose belt: A misaligned belt or a belt that is too loose can cause it to come off.
  4. Improper belt size or type: Using an incorrect size or type of belt can cause it to slip or come off.
  5. Engine vibration: Excessive engine vibration can cause the belt to loosen, leading to belt failure.
  6. Engine overheating: Overheating the engine can cause the belt to expand and slip off.
To determine the cause of the problem, it's recommended to have a mechanic inspect the serpentine belt system on your vehicle.

(1999 pontiac grand prix 3100 v6) how do I remove and replace my serpentine belt successfully?

Instructions Things You'll Need
  • 3/8-inch drive breaker bar
  • Metric socket kit
  • New serpentine belt
    • 1

      Park the Pontiac in a safe work area and open the hood.

    • 2

      Inspect the top of the black plastic cover that surrounds the fan for the serpentine belt routing diagram. This diagram has the instructions for installing the new serpentine belt around the accessory pulleys.

    • 3

      Inspect the front of the engine and locate the automatic belt tensioner. The tensioner on the 1999 Pontiac model vehicles is located between the alternator and the crankshaft pulley. The tensioner has a pulley on one end with a bolt head in the center of the pulley. Use the bolt head to rotate the tensioner.

    • 4

      Turn the tensioner counterclockwise with the breaker bar and a metric socket. Pull the belt out from under the tensioner pulley with your other hand. Then, slowly let the tensioner retract until it stops.

    • 5

      Pull the belt out of the other remaining pulleys. Then, pull the belt out of the engine bay and lay it on the ground.

    • 6

      Route the new belt around the crankshaft pulley. Then, route the new belt around the other remaining pullleys by using the serpentine belt routing diagram for instructions.

    • 7

      Rotate the tensioner pulley counterclockwise with the breaker bar and socket. Then, slide the new belt under the tensioner pulley. Slowly let the tensioner retract until it stops. The tensioner pulls all of the slack out of the belt and brings the new belt to the proper tension. Remove the breaker bar and socket from the tensioner pulley.

    • 8

      Inspect the new belt to ensure that it is seated inside of all the accessory pulleys as directed by the diagram. Then, crank the engine and allow it to run for about 15 seconds. Turn the engine off. Inspect the belt again once more to ensure that
      the belt is still around each pulley. Close the hood.


Change EGR Valve. Alternator in the way. Do I have to remove alt and how do I take serpentine belt off?

& 3.8L Engines
All of the belt driven accessories on the 3.3L and 3.8L engines are driven by a single serpentine belt. The belt tension is maintained by am automatic tensioner.

Belt Tension Inspection

Inspect the drive belt for signs of glazing or cracking. A glazed belt will be perfectly smooth from slippage, while a good belt will have a slight texture of fabric visible. Cracks will usually start at the inner edge of the belt and run outward. All worn or damaged drive belts should be replaced immediately.

Drive Belt Routings


Fig. Accessory V-belt routing-3.0L engine


Fig. Accessory V-belt routing-3.3L and 3.8L engines


Wiring issues?

Power windows are a drain on a car, especially in GM models. They tend to go slower as the battery weakens. I'd check the battery terminals for corrosion and the cables for tightness. If the terminals/cables are corroded, that could very well be the source of your problem. There are some very good products that just spray on the cables/terminals to remove corrosion or you can remove the cables and use emery paper to clean off the corrosion.

If the cables and terminals are clean and the connections are tight, then check the drive/serpentine belt for snugness. A loose drive belt will slip which in turn the alternator won't put out it's normal charge. This would make a car stall over time. If the drive/serpentine belt is not slipping (check for shiny spots or cracks on the inside of the belt) then lastly, the problem would lie with your charging system, mainly the alternator.

I hope this answers your question. Please feel free to post back with any other questions and thank you for using Fixya! All the best!

I just had to replace the serpinteen belt then it was ok for a day or tow, then all of a sudden when I started it it didn't want to go it was dogging, now it will start hard , the engine is moving some it...

You need to removed the serpentine belt, and inspect all of the accessory components that the belt drives. Spin the alternator, power steering pump, air conditioning compressor, and the tensioner by hand, and see if any of them are binding or turning hard. My daughter's car was stalling out, and barely starting, and it was caused by a bad alternator.
Hope you find the culprit!

Maxima 2006 drive belt

First, keep this link which is to the diagram of the serpentine belt. It will be useful in knowing how to route th new belt...

Next, here's a link to a good video on how to replace a serpentine belt...

When my serpentine belt broke three times the problem was diagnosed as the power steering pump. Why wasn't this diagnosed when the tensioner was replaced. I am now replacing the power steering pump and...

That is a valid question, but you should ask the shop that worked on it. Also do you know that the power steering pump will cure the problem? This remains to be seen....You can check one thing though...Look at the belt/pulley arrangement from the side. any pulley that is not exactly in line with all others, and any wobbling pulley is suspect. Serpentine belts are far less forgiving of these items than were "v" belts.
Good luck
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