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Hi, I'm Mike from 1AAuto. We've been selling auto parts for over 30 years! We're dedicated to delivering quality auto parts, expert customer service, and fast and free shipping, all backed by our 100% satisfaction guarantee. So visit us at 1AAuto.com, your trusted source for quality auto parts.
In this video we're going to be working with our 2002 Chevy Suburban 5.3-liter V8. We're going to show you how to remove and replace the serpentine belt tensioner. This is for the forward serpentine belt that runs all the accessories, with the exception of your air conditioning.
If you like this video, please click subscribe. We have a ton more information on this and many other vehicles. If you need this part for your car, you can follow the link down in the description over to 1AAuto.com.
Here are the items you'll need for this repair: flat blade screwdriver, 15mm wrench, 15mm socket, ratchet, socket extension
Loosen the hose clamp just after the mass air flow sensor. This is going to be the second one back from your air box. We'll do this using a flat blade screwdriver. Wiggle and twist the boot to release it from the mass air flow sensor. You may need to use your screwdriver to help peel it back here. These tend to get stuck on pretty good. We'll also remove the one at the throttle body. We'll need to disconnect the hoses from their clamps here. You can either try prying it out there, or there's also a little clamp at the bottom here that you should be able to compress, pop loose with a flat blade, and remove the intake runner from the vehicle.
We've removed some things like the radiator fan and the fan shroud to make it easier to show you what's going on, but you shouldn't need to do this if you're doing this job at home. Before removing your serpentine belt, make sure your vehicle has a belt path diagram under the hood somewhere. If this is missing or faded, you can just draw another one onto the plastic with something like a paint marker. Using a 15mm wrench on the tensioner, rotate the nut clockwise to slack the belt. Pop the belt off of whatever pulley is easiest for you to reach. Let the tension off the pulley and remove your serpentine belt.
You need a 15mm socket, ratchet, and extension to remove the three 15mm bolts on the tensioner bracket.
Reinstall the serpentine belt tensioner onto the water pump housing cover. Two longer bolts go in the upper holes, and the shortest bolt goes in the bottom. Tighten these bolts with a 15mm socket and ratchet.
Install the belt over the front grooves of the harmonic balancer or crank pulley. Bringing the right side over top of the pulley. We'll then go over top of the water pump and loop under the power steering pump, over the alternator, under the idler pulley. I'll keep this piece in my hand. Make sure that everything is seated because this one's kind of tight and you're going to want the room. Using my 15mm wrench, we'll take the tension off of the tensioner pulley, slide the belt over, double-check that our path is right, all of the belt is properly seated, and then let the tension back on.
Reinstall the intake tubing. It's easiest to set it onto the throttle body. Reengage the hoses into their clips and then get the boot over the air box. Then tighten down both clamps with a flat blade screwdriver.
Thanks for watching. Visit us at 1AAuto.com for quality auto parts, fast and free shipping, and the best customer service in the industry.
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Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the internet. Hi, I'm Mike Green, I'm one of the owners of 1A Auto. I want to help you save time and money, repairing and maintaining your vehicle. I'm going to use my 20 plus years experience restoring and repairing cars and trucks like this. To show you the correct way to install part from 1AAuto.com. The right parts, installed correctly. That's going to save you time and money. Thank you and enjoy the video.
In this video, we're going to replace the serpentine belt tensioner on this 2002 Sierra with a six liter. The same procedure for any GMC or Chevy truck, 99' to 07' basically. With 4.8, 5.3, or six liter v8's. Tools you'll need, flat blade screwdriver, 15mm socket and ratchet with a small extension. Symptom of a bad belt tensioner is a squeaking from the front of your engine. Could also be your idler pulley. Just check out our other video to see the idler pulley removal and installation. First you want to move your intake hose. By removing, or loosening two clamps, one there and one there. We're going to speed up through this part here. Use your screwdriver to pry in, break the rubber loose and the plastic, Maybe twist it a little bit as well. Then pull it from the throttle body and also pry ... there's a little clip that hold the radiator hose in, pry that out with your screwdriver as well. Now I'm going to install it back on my intake hose, to make it easier for later.
Now you can see your tensioner is right here. What you're going to do is take a 15mm socket and ratchet and put the socket on there. Then that takes the ... you just move the ratchet clockwise and that takes the tension off. You can pull the belt either off of your tensioner or I'm actually over here pulling it off of the idler pulley in the middle. Then slowly release this back. It's going to actually go back further than the original point. Now get your wrench back off. Once you have your belt off, many times you can reach in here and spin these and hear some grinding or shaking, or shake them back and forth and you can there's some play in that pulley. This is your idler pulley here. Many times there is play, this one feels actually pretty good. There is also another tensioner on this vehicle. It's for the AC belt and you can see it right down in there.
You can see that belt is actually looking a little cracked, so I'm going to replace that as well. That will be on a different video, but that's something to keep in mind. You may take your drive belt off and realize that these ones really aren't the problem. Your noise might be coming from the AC tensioner down there. You can check out our other video to see that. To remove your tensioner there's three bolts. You can see one here, one down lower, and then there's one right down below there. Those are 15mm bolts. I'm going to use a 15mm socket with an extension and a ratchet and remove these bolts. I'm going to really speed through taking these bolts off. You don't really need to see me working a ratchet. Pretty all surprised on this truck, truck has got a lot of miles and it doesn't look like this has been replaced before. The bolts came loose pretty easy.
Then, as you probably see here, I actually used my fingers to loosen them or take them out most of the way. Here I am just removing the last top bolt. Now the tensioner comes up and out. Here you can see, here's the original tensioner, new tensioner from 1A Auto. All the same, going to mount the same. What I usually like to do is ... that actually goes in like that. Take our top bolt, put it in, put it down in, and start that top bolt. Take our bottom, long bolt, put it in, start it. Then our third bolt that's way down on the bottom, put it in and start, and then tighten them up. Once again, we'll fly through me just tightening these three bolts. When you tighten the bolts you want to probably give them a final tightening 30 to 35 foot pounds. To put the belt back on, what you want to find is your routing diagram.
We're going to be using this one right here. The solid belt is the one that we're going to be looking at. What you're going to do is actually feed it down and around your crank pulley first. Then up and over your water pump, around your power steering, and then up in here. Then you'll pull, what I usually do is pull on here and then pull it up onto the alternator. I'll show you that, you can't really film it very well, so you'll have to take ... Of course, I can't really film it that well, so you have to take my word for it that that's what I'm doing. You can take your belt, feed it down, feed it down, and just make a loop. Make sure it goes all the way around your crank pulley, over the water pump here, and down and around the power steering pump. First I went down and around my crank pulley, up and around the water pump, with the back side of the belt. Then around the power steering pump. Now I have this part that I can hold to put onto the alternator.
I'm just going to set it there for a second. Took my socket, put it on my 15mm bolt on my tensioner. Then while I pull this way on the tensioner, I'll take the belt and pull it up and onto the alternator. Then the tensioner takes over and I'm just going to push it on a little more to my idler pulley here. Make sure it's pretty well centered. After you have the belt on, just a quick check, make sure it's on all the pulleys. Look way down at the crank pulley and make sure that it's on correctly down there. Also, obviously over here, the alternator and the power steering pulley. Everything looks good. We're going to fast forward though this section, which is just putting that tube back in basically, and pushing the rubber onto the plastic. Tightening up the clamps and reinstalling that little clip that held the radiator hose to it. After that you should be pretty much all set.
We hope this 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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Brought to you by 1AAuto.com, 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, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.
In this video I'm going to show you how to replace a serpentine belt. This 2005 Chevy Silverado has the 4.3 Liter V6 so this procedure is the same for any Silverado or Sierra that has the 4.3 Liter V6 from 1999 through 2007.
The serpentine belt is pretty easy. First, make sure you find your belt diagram. This is the 4.3 Liter V6 so there's the diagram and it matches up with what's in the engine compartment. Removing the belt is pretty easy. Put a 3/8 inch drive ratchet right in here. Pull on that. See that loosens the belt. Move it from the idler pulley up top. Release that slowly. Then you pull your belt right off.
To put the belt on, you want to follow the pattern. You can't really see this but I'm going to go down around the crank pulley first, then I bring this up and around the water pump here. Then it goes from the water pump down to the power steering pulley here, up to the A/C pulley, across the tensioner and the alternator. I'm just going to reach down and make sure everything is pretty much on the way it should be. Now, you can press down when you see the belt starts to tighten up as you try and press it on to the idler here. Then we take our wrench, put it in, press down. That gives us the slack to put the belt right in here. Then just check. Make sure it's on all the pulleys correctly. It's in the grooves. It's actually not quite on there correctly, so pull it off here. Okay, the new belt is on.
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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If you were to look right down here, you're gonna see a clamp. If you were to look at the other end where it connects onto the throttle body, you're gonna see another clamp. You go ahead and loosen those up. Also, if you come right up here, you're gonna see an 8-millimeter bolt. If you loosen that up, you can take this right out. Once you have that out of the way, and the clamps are loosened, you can wiggle this around. I'm gonna draw it off of the throttle body right here, and I'm gonna come right there, take it off of right here, remove it from the vehicle.
So now that we have the intake and the little shell out of the way here, it gives us a nice, clear view. You don't necessarily need to take off the shell but I just like to have it out of the way. Go ahead and relieve your tension like that. And then I'm just gonna take the belt off of the idler pulley here and then I can let go of that. We'll get our serpentine belt tore right out of the way. Let's go ahead and remove the belt. Go ahead and take one side, go down and around the passenger side of the water pump, which is this right here, and then put it over the crank, which is the main pulley over there. Just gonna circle it, put it up and then slide it around. I'm gonna take one and I'm gonna come up and over the tensioner right here, and then the other side. I'm gonna bring it down and around the water pump and then underneath the power steering pump. It's gonna fit right inside the ribs perfectly. And then I'm gonna come up. Make sure it's sitting in those ribs. There it is. Come up and over the alternator right here. This looks good. Make sure everything is situated approximately where it needs to be. That looks great. I'm gonna grab my tensioner tool, put it on there, relieve tension. Now I'll take this, bring it right underneath the idler pulley. This is your idler pulley. Get our tool off, give it a nice tug, and then of course double-check all of your pulleys, every one of them that has the rib side that goes up against the belt, you need to make sure it's sitting perfectly inside the ribs.
Wondering what your belt routing should look like? You can find it right on the front. Gonna take back on here. It's gonna go right underneath this hose here, line it up there, grab this, slide it in, push it all the way in so it's up against the whole throttle body. Make sure your clamps are nice and tight. Your hose over here should have a little clippy-do. Ours is actually broken. But it's gonna push in right there and that will hold it secure. This cover back on here, just slide it all the way back so it's sitting inside the pitons, put this down and tighten up your bolt.
Tools used
Tools used
If you were to look right down here, you're gonna see a clamp. If you were to look at the other end where connects onto the throttle body, you're gonna see another clamp. You can go ahead and loosen those up. Also, if you come right up here, you're gonna see an 8-millimeter bolt. If you loosen that up, you can take this right out. Once you have that out of the way and the clamps are loosened, you can wiggle this around. I'm gonna draw it off of the throttle body right here, and I'm gonna take them right there. Take it off of right here, remove it from the vehicle.
So now that we have the intake and the little shell out of the way here, it gives us a nice, clear view. You don't necessarily need to take off the shell, but I just like to have it out of the way. Go ahead and relieve your tension like that. And then I'm just gonna take the belt off of the idler pulley here and then I can let go of that. We'll get our serpentine belt tool right out of the way. Let's go ahead and remove the belt. To get started on your idler pulley, one of the best things you wanna do is to compare your new one to your old one. You wanna make sure that it's overall the same diameter, which would be the length right here from top to bottom, and you also wanna make sure that the depth is approximately the same. That's gonna be the area where the belt's gonna ride. This looks great, so let's get ready for an install.
Now we're gonna use a 15-millimeter socket, remove the mounting bolt. There it is. So now looking at the backside of it, you can see the area that's holding the mounting bolt in. It's like a little clippy do. It's a single time use and we're gonna break it off. Just going to hit it with some penetrant, let that sit for a second. Now I'm gonna grab some of these cutters and I'm gonna try to grab on to any of these ears I can, try to peen them up and rip this off. You can also use a pocket screwdriver, try to get under there. There we are. We can start separating everything. We'll pull this spacer right off of there. We're gonna reuse that. Grab this stuff, just like that.
Now we're gonna take our new pulley, our old adapter. This is the spacer that goes in between the pulley and the engine itself. We'll put that right along the backside. It should fit right in. That's great. Take it like this. Start the bolt through and now go ahead and start it right into the engine. Go ahead and torque it to 37 foot-pounds. Go ahead and take one side, go down and around the passenger side of the water pump, which is this right here, and then put it over the crank, which is the main pulley over there. I'm just gonna circle it, put it on, then slide it around.
I'm gonna take one and I'm gonna come up and over the tensioner right here. And then the other side, I'm gonna bring it down and around the water pump. And then underneath the power steering pump, it's gonna fit right inside the ribs perfectly. Then I'm gonna come up, make sure it's sitting in those ribs. There it is. Come up over the alternator right here. This looks good. Make sure everything's situated approximately where it needs to be. That looks great. I'm gonna grab my tensioner tool. Put it on there. Relieve tension.
Now we'll take this, bring it right in underneath the idler pulley. This is your idler pulley. Get our tool off, give it a nice tug. And then of course double-check all of your pulleys. Every one of them that has the rib side that goes up against the belt, you need to make sure it's sitting perfectly inside the ribs. If you're wondering what your belt routing should look like, you can find it right on the front. Get our air intake back on here. It's gonna go right underneath this hose here. Line it up there. Grab this, slide it in, push it all the way in so it's up against the whole throttle body. Make sure your clamps are nice and tight. Your hose over here should have a little clippy do. Ours is actually broken, but it's gonna push in right there and that'll hold it secure. This cover back on here, just slide it all the way back so it's sitting inside the pitons. Put this down and tighten up your bolt.
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If you were to look right down here, you're gonna see a clamp. If you were to look at the other end where it connects on to the throttle body, you're gonna see another clamp. You can go ahead and loosen those up. Also, if you come right up here you're gonna see an 8-millimeter bolt, if you loosen that up you can take this right out. Once you have that out of the way and the clamps are loosened, you can wiggle this around. I'm gonna draw it off of the throttle body right here, and I'm gonna take them right there. Take it off of right here, remove it from the vehicle. So now that we have the intake and the little shell out of the way here, it gives us a nice, clear view. You don't necessarily need to take off the shell but I just like to have it out of the way.
Go ahead and relieve your tension like that. And then, I'm just gonna take the belt off of the idler pulley here and then I can let go of that. We'll get our serpentine belt right out of the way. Let's go ahead and remove the belt. Let's remove the five bolts that hold up your skid plate. Now that that's out of the way, we have a clear view of the AC belt tensioner right there. Go ahead and use a 3/8 ratchet with a short extension. Put it right in the slot. When you pull this down, it's gonna relieve tension, and then, we'll just get the belt right off of there. There we are. Take that off of there. I'm gonna take it, I'm gonna go over that AC compressor. And then, I'm gonna start over the top of the crank. Now that we have that up and over the crank, and then, it's heading its way over to the AC pulley, I'm gonna go ahead and pull this down, give myself a little bit of slack. Put the belt up over the tensioner, and then, just start working it over the AC clutch itself. When you do this, you want to try to be as straight as possible because if you come in at an angle, it's not gonna fit very well. Okay, I relieve tension. Now, you just want to check that belt, feel all the way around, make sure it's on the crank perfectly. Now, we're gonna go and put our shield back up on here.
Go ahead and take one side, go down and around the passenger side of the water pump which is this right here, and then, put it over the crank which is the main pulley over there. I'm just gonna circle it. Put it up and then slide it around. I'm gonna take one, and I'm gonna come up and over the tensioner right here. And then, the other side I'm gonna bring it down and around the water pump, and then, underneath the power steering pump. It's gonna fit right inside the ribs perfectly. And then I'm gonna come up, make sure it's sitting in those ribs. There it is. Come up over the alternator right here. This looks good. Make sure everything is situated approximately where it needs to be. That looks great. I'm gonna grab my tensioner tool. Put it on there. Relieve tension. Now, I'll take this, bring it right underneath the idler pulley. This is your idler pulley. Get our tool off. Give it a nice tug. And then, of course, double check all of your pulleys. Every one of them that has the rib side that goes up against the belt, you need to make sure it is sitting perfectly inside the ribs. If you're wondering what your belt routing should look like, you can find it right on the front. We'll get our intake back on here. It's gonna go right underneath this hose here, line it up there. Grab this, slide it in. Push it all the way in, so it's up against the whole throttle body. Make sure your clamps are nice and tight. Your hose over here should have a little clippy-do. Ours is actually broken, but it's going to push in right there and that will hold it secure. Put this cover back on here, just slide it all the way back so it's sitting inside the pitons. Put this down and tighten up your bolt.
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If you were to look right down here, you're gonna see a clamp. If you were to look at the other end where it connects on to the throttle body, you're gonna see another clamp. You can go ahead and loosen those up. Also, if you come right up here, you're gonna see an 8-millimeter bolt, look, if you loosen that up, you can take this right out. Once you have that out of the way, and the clamps are loosened, you can wiggle this around. I'm gonna draw it off of the throttle body right here, and I'm gonna take them right there. Take it off of right here, remove it from the vehicle. So now that we have the intake and the little shell out of the way here, it gives us a nice, clear view. You don't necessarily need to take off the shell but I just like to have it out of the way. Go ahead and relieve your tension like that. And then, I'm just gonna take the belt off of the idler pulley here, and then I can let go of that. We'll get our serpentine belt right out of the way. Let's go ahead and remove the belt. Okay, looking at our new tensioner, you can tell that you're gonna have three mounting bolts. I'm gonna use my 15-millimeters socket and my ratchet and I'm gonna remove all 3. There will be one located here, one located much lower, down near thermostat housing, and then, also one over towards the driver's side top. Start with the hardest one.
Here's our tensioner friends. Now, once you confirm that your new tensioner is correct and it matches the original, it's time to get the bolts and everything back in. You're gonna notice that two of your bolts are long and one short. The short bolt is going to be the lowest bolt, the other two longer bolts are going to be the upper bolts. I always start in all of my bolts before I tighten any of them up completely. Now, it's time to torque these. Torque them to 37 foot-pounds. All right. Go ahead and take one side, go down and around the passenger's side of the water pump which is this right here, and then, put it over the crank, which is the main pulley over there. I'm just gonna circle it. Put it up and then slide it around. I'm gonna take one, and I'm gonna come up and over the tensioner right here. And then, the other side. I'm gonna bring it down and around the water pump and then underneath the power steering pump. It's gonna fit right inside the ribs perfectly. Then, I'm gonna come up, make sure it's sitting in those ribs. There it is. Come up and over the alternator right here. This looks good. Make sure everything is situated approximately where it needs to be. That looks great. I'm gonna grab my tensioner tool. Put it on there, relieve tension. Now, I'll take this, bring it right underneath the idler pulley. This is your idler pulley. Get our tool off, give it a nice tug. And then of course, double check all of your pulleys. Every one of them that has the rib side that goes up against the belt, you need to make sure it is sitting perfectly inside the ribs. If you're wondering what your belt routing should look like, you can find it right on the front. Get our intake back on here, it's gonna go right underneath this hose here. Line it up there. Grab this, slide it in. Push it all the way in so it's up against the whole throttle body. Make sure your clamps are nice and tight. Your hose over here should have a little clippy-do. Ours is actually broken but it's going to push in right there and that will hold it secure. Put this cover back on here, just slide it all the way back so it's sitting inside the pitons. Put this down and tighten up your bolt.
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You remove this cover, there's a bolt right here. Use an 8-millimeter socket, take that out, and slide the cover up, slide it forward. There's a bracket right here that holds the coolant hoses on, just use a trim tool and just separate that from that. This one's broken in this vehicle. Now we wanna remove the snorkel and use an 8-millimeter socket, loosen up the worm clamp, or you can use a straight blade screwdriver. So right here. Slide this off and slide it off the throttle body and pull it out of your way. And use a 15-millimeter wrench or you can use a belt tensioner tool and just put it on the belt tensioner, loosen this up. Slide the belt off of the idler pulley. Loosen up on the tensioner and slide the belt off the alternator, off the power steering pump pulley, off the water pump, and off the crank pulley.
All right, take the serpentine belt and slide it over the crank pulley first and go over the water pump. The backside of the belt needs to go over the water pump. And go down to the power steering pump and up over the alternator. And then over the tensioner right here and you hold off on putting it over the idler pulley till last. And now take your belt tensioner tool or a wrench and just take the tension off the tensioner. All right, now I'm gonna slide the belt close to the idler pulley and take the tension off the tensioner with your wrench or your belt tension tool. Just be careful. And take the wrench off and just double-check all the pulleys and it looks good. Now take the intake snorkel and line this up over the throttle body and that's good there. And then line it up on the mass airflow sensor, just like that. And tighten this up, tighten up that worm clamp and then same with this one. And take this bracket and then reposition that into that bracket. This one is broken. And slide this cover back on. Get this bolt started and tighten that up.
