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How To Replace Serpentine Belt 99-04 Oldsmobile Alero

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How To Replace Serpentine Belt 99-04 Oldsmobile Alero

Created on: 2021-01-16

Use the belt diagram provided in this instructional video to help you replace the serpentine belt on your 99-04 Oldsmobile Alero 2.4L.

  1. step 1 :Remove the serpentine belt
    • Locate your serpentine belt routing diagram
    • Draw out a diagram or take pictures if you can’t find it.
    • Use your 15 mm wrench to release tension from the belt tensioner
    • Remove the serpentine belt.
  2. step 2 :Install the serpentine belt
    • Locate your belt diagram
    • Loop the serpentine belt around the pulleys
    • Release tension from the belt tensioner with your 15 mm wrench
    • Loop the serpentine belt over the last pulley.
    • Slowly ease back on the wrench to return tension to the belt.
    • Success! Enjoy your new serpentine belt from 1A Auto.

Tools needed for replacement

  • Wrenches - Metric

    15mm Wrench

Installation Video
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Brought to you by, your source for quality replacement parts and the best service on the Internet. Hi, I'm Mike, from 1A Auto. I hope this how-to video helps you out. Next time you need parts for your vehicle, think of Thanks.

In this video, I'm going to show you how to remove and reinstall the serpentine belt on this 2000 Oldsmobile Alero. This vehicle has the twin cam 4-cylinder, and the belt actually turns out to be pretty good, so I'll just take it off and put it back on and show you. The only tool you're going to need is a 15 mm open-end wrench. On these engines, the belt enters right down there. What you want to do is take a 15mm wrench and put it right on that bolt right there. Now what we do is take our wrench, and push it towards the back of the engine. That loosens the belt. You can take it right off of the alternator there. Slowly let your wrench back, pull it out, and the belt, pull it off your crank and your AC, and pull it out.

Just in case you didn't catch it, and because diagrams always help me, this is a diagram of how the belt's going to run. Basically what I do, because it's a little tough to film it, but I basically put a loop down around the crank and the AC pulley, and then I kind of pull it up, or actually push it down around the tensioner, and then hold it up. While I take the pressure off the tensioner, I then put it on the alternator. To reinstall the belt, it's a little tough to see here, but you basically just want to put it down and get it around the AC compressor first. Then down, and I'm going to reach behind the motor, or behind this mount here and pull it around my crank pulley. Once you have your belt down around your crank and your AC pulley, then you push it down and put it underneath your tensioner pulley so that the side coming from the crank to the tensioner is down there.

Now I'm holding it up right here. I take my wrench, put it on here, pull my wrench over, put the belt on to the alternator. Make sure it's still on the tensioner there. Let the wrench off. My belt's on. I want to make sure it's on everything correctly. That looks pretty good.

We hope this helps you out. Brought to you by, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.

Tools needed for replacement:

    Wrenches - Metric

  • 15mm Wrench

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