How to Replace Idler Pulley 2000-08 Chevy Suburban (2024)

Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

Hi, I'm Don from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.

In this video, we're going to show you how to replace the idler pulley on this 2002 Chevy Suburban. It's the same part and process on these Suburbans from 2000 to 2008. The items you'll need for this are a new idler puller from 1Aauto.com, a 10 and 15 mm socket and ratchet, and a flat blade screw driver.

Start off by loosening these two hose clamps, using your flat blade screw driver. We'll just fast forward as Don does this. Just pry this clip out and then pull the hose back. You may need a flat blade screwdriver to help you pry it free. Then pull forward and lift it up and out.

Next, remove these two 10mm bolts, and we'll fast forward as Don does that. Pry the clip on this hose out of the fan shroud. Then remove these four clips around your shroud. To remove these clips, you just pry up the center and then pull the clip out. We'll fast forward as Don does this to the other three. Now, just pull that hose back and lift the shroud straight up and out.

Using a 15 mm socket and ratchet, just put it here on the tensioner. Push down on the tensioner and pull the belt up and over the idler puller. Then, carefully release then tension on the tensioner and loosen this 15 millimeter bolt. We'll just fast forward as Don loosens that. Once you loosen that enough it will just pull free with the pulley. Now, to separate the bolt from the pulley, you just need to pry off this ring and then pull the bolt out.

On the left is the old idler puller. On the right is the new one from 1A Auto. You can see they're identical, and they'll fit exactly the same. Put the bolt back into the idler pulley and then slide that nut down, and then that ring. Make sure that ring's pushed all the way back down in and that you bend those tabs back down if they got popped up when you pried it off. Then, push the pulley back into place with the bolt and just start hand tightening it. Once you've got it started you can use your ratchet to tighten it up the rest of the way. Now, push back down on the tensioner and push the belt back underneath the idler pulley. Then carefully release the tension on the tensioner and pull the ratchet free.

Now, to replace the shroud just push it back down into place. Then replace those four clips. Just push them back down into place and push the center down to lock them. Push the hose back into place and then replace those two 10 mm bolts.

Now, take this air intake hose and push it back down into place on the air intake box, and then, on to the engine. Then just tighten up those two hose clamps. Then just re-clip that hose to the air intake hose, and you're all set.

We hope this video helps you out. Brought to you by www.1AAuto.com, 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.

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How to Replace Idler Pulley 2000-08 Chevy Suburban (2024)

FAQs

What is the difference between idler pulley and tensioner pulley? ›

However, in terms of function and purpose, an idler pulley is responsible for guiding a belt drive in an engine or mechanical system, while a tensioner pulley is responsible for tensioning the drive belt.

How long does it take to replace a pulley on an idler? ›

An idler pulley is expected to wear over time, and eventually the pulley will fail. Replacement intervals for idler pulleys vary, but are usually within the 50,000 to 100,000 mile range. Replacement often coincides with expected serpentine/accessory belt replacement periods.

Why is my idler pulley squealing after replacement? ›

If the belt is not properly aligned with the pulleys, it can put additional stress on the idler pulley, causing it to squeal. Misalignment can occur due to improper installation or wear and tear on other components in the belt drive system.

What is the best way to check an idler pulley? ›

Rock – Rock the pulley back and forth. There should be no movement or play from side to side. Misalignment – Misaligned pulleys will cause belt chirp noise problems and are caused by worn bearings. Cracked or Broken Pulley – Check for obvious physical damage.

What happens if you over tighten an idler pulley? ›

An over-tightened belt can burn out any bearing that the belt rotates on, including alternator, power steering pump, A/C compressor, idler pulleys, etc.

Is it safe to drive with a bad idler pulley? ›

So, how long can you drive with a bad idler pulley? The safety recommendation is not to drive the car at all and take it to a mechanic immediately. You should be concerned if the vehicle makes squeaking or rattling noises. The car can still run for months or break after a few days.

How much does it cost to replace a pulley on an idler? ›

The average cost for a Drive Belt Idler Pulley Replacement is between $150 and $186. Labor costs are estimated between $66 and $83 while parts are priced between $84 and $103. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.

What tools do you need to change an idler pulley? ›

Tools You Need
  • A new idler pulley.
  • A socket set.
  • A torque wrench.
Jun 1, 2020

Does the size of the idler pulley matter? ›

The size and shape of the idler pulley don't impact the speed or output of the belt, since the pulley is spun by the belt.

How do I know if my pulley needs replacing? ›

Damaged pulley bearings can cause the pulley to freeze completely, preventing the belt from moving properly. You can check for this specific issue by taking your belt off the pulley in question and attempt to spin it by hand. If you find the pulley has any resistance, it will likely need to be replaced.

What happens if you drive with a bad idler pulley? ›

Car Overheats

The water pump maintains the temperature of your car's engine. If the idler pulley fails, the water pump pulley will cease to function. Without it, your engine could overheat and cause severe damage to various parts.

How to know if your tensioner pulley is bad without? ›

Firstly, the most common sign of a bad tensioner is noise from the belts or the tensioner itself. Squeaking or squealing may occur, especially during startup, indicating a loose tensioner. Additionally, a worn-out tensioner pulley or bearing can produce a grinding noise.

How long can you go with a bad idler pulley? ›

So, how long can you drive with a bad idler pulley? The safety recommendation is not to drive the car at all and take it to a mechanic immediately. You should be concerned if the vehicle makes squeaking or rattling noises. The car can still run for months or break after a few days.

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