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belt squeaking suddenly #5359400 02/25/20 12:45 AM
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dogememe Offline OP
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2001 Chevy Suburban 5.3 with about 291k miles.

Bought the truck used a while back so no idea when belt was last changed. Drove it earlier in the day, no noise... Got home, parked it, then two hours later went to go somewhere and the belt squeaks now.

What causes the belt to suddenly squeak? And it's not just a chirp, it's constant.

In my mind as the belt wears it would slowly make more noise. Not go from silent to super squeaky from one drive to the next??

Last edited by dogememe; 02/25/20 12:46 AM.

2010 Ford Escape 2.5 ~103K Miles: Castrol Magnatec 5W-20, Wix Filter.
2001 Chevy Suburban 5.3 ~291K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
Re: belt squeaking suddenly [Re: dogememe] #5359411 02/25/20 01:20 AM
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pitzel Online Content
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Pull the belt off, spin the pulleys by hand, inspect the belt, etc. At 291k miles, it could very well be practically any individual element on the entire belt system that's causing the problem.

Re: belt squeaking suddenly [Re: dogememe] #5359418 02/25/20 01:33 AM
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Dave9 Offline
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I'd inspect the belt to see how worn (the ribs are, or evidence of excessive cracking or plies coming out), or just replace it now to reset the age to day 1.

Otherwise, maybe it's the belt or maybe a pulley. Pitzel nailed it, and if you can't find a fault with the belt or any pulley driven parts (or pulley bearing itself), then it is probably due to have the belt tensioner replaced. Frankly at that mileage I'd just plan on a new tensioner with a new belt, kill two birds with one stone since tensioners aren't expensive.

Re: belt squeaking suddenly [Re: dogememe] #5359421 02/25/20 01:39 AM
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Kibitoshin Offline
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Pull the A/C belt and see if the noise disappears. It's common for Denso compressor pulley bearings to grenade and make a huge racket.


Shin Gekiretsu Shin'ou'hou
02 Chevy Silverado C1500 V8 5.3L
Penske Freightliner M2-106 Reefer Box Truck ISB6.7
Re: belt squeaking suddenly [Re: Dave9] #5359427 02/25/20 01:49 AM
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pitzel Online Content
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Originally Posted by Dave9
Frankly at that mileage I'd just plan on a new tensioner with a new belt, kill two birds with one stone since tensioners aren't expensive.


OEM or a reputable brand from a reputable source, not eBay "People's Republic of Low Prices" junk. Please.... (burned twice this week already...)

Re: belt squeaking suddenly [Re: dogememe] #5359431 02/25/20 02:01 AM
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Black_Thunder Offline
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did it somehow get moisture into the ribs of the belt?

sometimes that can be fixed but taking a simply wire brush to clean the rust/debris out of the ribs


is it a squeal vs a squeak?


I'd buy Callahan autoparts if I could.
Re: belt squeaking suddenly [Re: dogememe] #5359624 02/25/20 10:00 AM
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PowerSurge Offline
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Check the belt tensioner.


1993 Porsche 964, 2001 Ford SVT F-150 Lightning, 2004 Chevrolet Corvette, 2018 Toyota Tundra and a few others
Re: belt squeaking suddenly [Re: PowerSurge] #5359633 02/25/20 10:15 AM
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JohnnyJohnson Offline
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Originally Posted by PowerSurge
Check the belt tensioner.


This! thumbsup


2004 Corolla 139577
Out: Havoline Pro DS 10w-30 Purolator PureOne 10-29-19 136457
In: Pennzoil Platinum HM 5W-20 ST 4386
2006 Duramax 77060
Out: T6 5W-40 XG9100 73909
In: Rotella Dino PH9100 11-3-19
Re: belt squeaking suddenly [Re: Kibitoshin] #5359653 02/25/20 10:42 AM
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dogememe Offline OP
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Originally Posted by Kibitoshin
Pull the A/C belt and see if the noise disappears. It's common for Denso compressor pulley bearings to grenade and make a huge racket.

Ugh, I used the AC for the first time in a while today. It better not be that!! But I will check everything, thanks.

And no, no eBay junk... My truck only gets quality parts!


2010 Ford Escape 2.5 ~103K Miles: Castrol Magnatec 5W-20, Wix Filter.
2001 Chevy Suburban 5.3 ~291K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
Re: belt squeaking suddenly [Re: dogememe] #5359674 02/25/20 11:07 AM
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WyrTwister Offline
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Does it have a single belt or more than one ?

I have DIY replaced the A/C clutch pulley on a GM , several years ago . A bearing is much cheaper than a compressor . Go down to AutoZone , O'Reilly , Advance Auto Parts & " rent " the tooling .

Still might be a good idea to check and replace as necessary , the belt & other components .

You have gotten a lot of good ideas / advice from the previous posts . Best of luck to you !


Wyr
God bless
Re: belt squeaking suddenly [Re: dogememe] #5359892 02/25/20 04:13 PM
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PontiacHO Offline
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Just a personal experience... Water pump starts seeping enough to drip on the crank pulley/belt and starts the noise. Not always the case but did happen to my Chevy.

Re: belt squeaking suddenly [Re: dogememe] #5367645 03/04/20 10:39 PM
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dogememe Offline OP
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Finally investigated this today.

First, I took off the belt and started the engine. Completely silent, no squeak. Started checking stuff and the water pump is bad. The whole fan clutch/pulley/hub has a ton of play in it. Ran out of daylight changing the water pump so I'll finish it next week. Hopefully that's the only issue!

I do have a question... what's the best way to hold the water pump to remove the fan clutch? I have the fan clutch holding loaner tool from O'Reilly but I think I need to use a couple bolts and put them through the pulley. Or is there a better way? Thanks...


2010 Ford Escape 2.5 ~103K Miles: Castrol Magnatec 5W-20, Wix Filter.
2001 Chevy Suburban 5.3 ~291K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
Re: belt squeaking suddenly [Re: dogememe] #5367667 03/04/20 11:19 PM
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Kibitoshin Offline
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Does the holder tool have pins to key into the pulley to help hold it in place? The most common method of removing the fan clutch is to leave the belt on, get a big wrench onto the clutch nut and use a small sledgehammer to loosen the clutch off the WP. For this one it's righty loosey.

Change the water pump then install e-fans from a later model truck. Best mod I've done to my 02.


Shin Gekiretsu Shin'ou'hou
02 Chevy Silverado C1500 V8 5.3L
Penske Freightliner M2-106 Reefer Box Truck ISB6.7
Re: belt squeaking suddenly [Re: dogememe] #5367669 03/04/20 11:27 PM
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clinebarger Online Content
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I have a broken breaker bar that I cut the head off of to make a extra long drift, Put it on the edge of the nut & give it a few smart blows with a hammer. These fan clutch nuts are Right Hand Thread....Lefty-Loosey.

I have the correct Pin Spanner/Holder & Wrench for these & only use it when Reusing the water pump, Far too much effort when you're replacing the pump!!


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: belt squeaking suddenly [Re: dogememe] #5368520 03/05/20 11:22 PM
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dogememe Offline OP
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All good ideas but I ended up just using an m5 bolt and nut to hold the pulley to the holder and then use a big adjustable wrench to get off the clutch. Easy!

I decided to go for a new tensioner and thermostat since those attach to the new pump. I'm glad I test assembled it all on the counter at the parts store because the brand new Gates tensioner was defective. The casting was just off enough to hit the water pump. I thought it was the pump but the new tensioner doesn't fit on the old pump and the old tensioner fit the new pump perfectly.

Trying to decide whether to go for e-fans. If I want it PCM controlled I have to pay for a tune since 01 didn't come with that. Or I can use a controller. Any opinions? I did e-fan conversion on a 95 Chevy and it was wonderful.


2010 Ford Escape 2.5 ~103K Miles: Castrol Magnatec 5W-20, Wix Filter.
2001 Chevy Suburban 5.3 ~291K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
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