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Old 12-08-2018, 08:20 AM   #1
cottondoc

Name: cottondoc
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Squealing serpentine belt?

Yesterday, out of the blue, my serpentine belt started chirping or squealing nonstop. Iíve only driven probably 100 miles or so around town and two lane roads since it started, but it is getting progressively worse. I sprayed the belt with WD-40(all I had available at the time)with the truck idling and the squeal would stop for 1-2 seconds until the WD-40 had worn off. I tried to check all the pulleys for play or signs of failure at the alternator, water pump, and power steering pump but I could not see anything obvious. There is no water leaking from the water pump and the truck runs normal and cool. The alternator is charging normally and the power steering seems to work normally. Nothing changes the squeal but engine rpm changes the speed. Any ideas on what it is or how to diagnose it? I had three water pumps go out, one on my 2007.5, one on my 2014, and one on my 1995, so that was my first thought. But all of them leaked water. They did not make the belt squeal. Could it just be the belt worn out? The truck is my 2006 5.9, 48re with 148,000 miles. Thanks for any help or info.


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2006 QCSB 4x4, 48re, Laramie, EFI Live tuned by HPP

1995 RCLB, 12V, 4x4, ProStreet Diesel built full billet auto, compounds 366/480, 5x.18 injectors, pump mods, fire rings, ARP 625 head studs - For Sale

Last edited by cottondoc; 12-08-2018 at 08:22 AM.
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Old 12-08-2018, 01:41 PM   #2
BigPapa
 
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Could be. I recently went through a similar ordeal with my 12V. I pulled the water pump and it had a tight spot that would chirp when you spun it, replaced it. Still had the squeal. Pulled the alternator and sent it to have bearings put in it. Was told the bearings were bad but the stator was also bad and he gave me a new alternator (he’s a good friend). Still had the squeal. Fan hub was definitely good and the compressor pulley was good. All that was left was the tensioner, original with 550K on it. It felt similar to the water pump so I replaced it. Still had the squeal. I didn’t want to remove the belt because it looked ok and I have to remove my crank sensor “conversion” to get it off. Sprayed some belt dressing on it and the squeal went away, so I put a new Gates HD green belt on it. Not a peep from it since.
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Old 12-08-2018, 01:44 PM   #3
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fan belts are cheap. 1 second the Gate HD green belts rock!
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Old 12-08-2018, 02:14 PM   #4
Justappumped24v
 
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I blew your 95 water pump on my way home with it too. Must be cursed!
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Old 12-08-2018, 02:23 PM   #5
blackmega3500
 
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Changing a belt with everything in place with a Fluidamper on a 6.7 pretty much sucks due to the clearance is all I have to add.
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Old 12-08-2018, 03:40 PM   #6
cottondoc

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Squealing serpentine belt?

Quote:
Originally Posted by Justappumped24v View Post
I blew your 95 water pump on my way home with it too. Must be cursed!


Well I said I blew it but, yeah it actually blew after you bought it I suppose! Haha! Hope all is well with you


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2006 QCSB 4x4, 48re, Laramie, EFI Live tuned by HPP

1995 RCLB, 12V, 4x4, ProStreet Diesel built full billet auto, compounds 366/480, 5x.18 injectors, pump mods, fire rings, ARP 625 head studs - For Sale
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Old 12-08-2018, 03:41 PM   #7
cottondoc

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Bought a new belt. Will update shortly with results.


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2006 QCSB 4x4, 48re, Laramie, EFI Live tuned by HPP

1995 RCLB, 12V, 4x4, ProStreet Diesel built full billet auto, compounds 366/480, 5x.18 injectors, pump mods, fire rings, ARP 625 head studs - For Sale
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Old 12-08-2018, 04:59 PM   #8
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Had the same problem, new belt cured it.
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Old 12-08-2018, 07:49 PM   #9
cottondoc

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Quote:
Originally Posted by Meyers Farms View Post
Had the same problem, new belt cured it.


New belt fixed my squeal as well. Hardest serpentine belt Iíve ever changed but it did fix the problem. Thanks for all the info and help


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2006 QCSB 4x4, 48re, Laramie, EFI Live tuned by HPP

1995 RCLB, 12V, 4x4, ProStreet Diesel built full billet auto, compounds 366/480, 5x.18 injectors, pump mods, fire rings, ARP 625 head studs - For Sale
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Old 12-08-2018, 08:04 PM   #10
Rich dzl

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Gates/napa green belt / seems to fix it more often than not ..
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Old 12-08-2018, 11:35 PM   #11
Mark Nixon
 
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I used to throw water pumps away from core engines, but 3 years ago, in the summer, I had 2 guys in 1 week kill water pumps on the side of the road and I had one go out on me last year.
Now I don't toss water pumps that seem like they might be usable.
I save decent belts, too.

I'm wary of belt noises.
For me, if one makes any kind of noise, I'm all over it trying to figure out why it's making noises.
You'd be surprised what a weak, worn belt tensioner can do to belts and all of the different, ugly noises a bad one can cause.

Mark.
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Last edited by Mark Nixon; 12-08-2018 at 11:36 PM.
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Old 12-08-2018, 11:51 PM   #12
blackmega3500
 
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Quote:
Originally Posted by Mark Nixon View Post
I used to throw water pumps away from core engines, but 3 years ago, in the summer, I had 2 guys in 1 week kill water pumps on the side of the road and I had one go out on me last year.
Now I don't toss water pumps that seem like they might be usable.
I save decent belts, too.

I'm wary of belt noises.
For me, if one makes any kind of noise, I'm all over it trying to figure out why it's making noises.
You'd be surprised what a weak, worn belt tensioner can do to belts and all of the different, ugly noises a bad one can cause.

Mark.
Had an alternator go out on me on Nov 14th..... that sucker made horrible grinding noises intermittently til it just gave the ghost.
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07.5 6.7l Mega-longbed conversion dually with 22.5s
EFI by ATP in Idaho, s364.5sxe/FI ETR s488 with V2 cover, s&s 135% overs, Hamilton springs/ pushrods and 188/220, suncoast Comp68 getting it all to the ground.

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Old 12-09-2018, 12:03 AM   #13
Mark Nixon
 
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I'm amazed at the abuse the alternators on these trucks do take, especially on high horsepower engines.
They are typically 5 or 6 to 1 overdriven, get punished not only by torque, but the oscillating loads from belt "surge" (there's a better term), then on top of that, there's the loads, amperage wise.

It's no wonder you heard it coming apart.

Water pumps make horrible noises, too!
Especially when the steel impellers chew up the block cavity, which is rare, because usually the bearings are gone and the belt comes off by then.

Mark.
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If you or I did business like the government does business, we'd be put in jail. In short, government is coercive.
Anarchy: The state of existence where there are no masters & no slaves. Therefore, Anarchy means the ABSENCE OF SLAVERY, or, in other words, FREEDOM.

Last edited by Mark Nixon; 12-09-2018 at 12:05 AM.
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Old 12-09-2018, 10:50 AM   #14
RacinDuallie
 
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Quote:
Originally Posted by blackmega3500 View Post
Had an alternator go out on me on Nov 14th..... that sucker made horrible grinding noises intermittently til it just gave the ghost.
Lawsuit pending??

There had to be pain and suffering through your trumatic experience.........
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Old 12-09-2018, 10:57 AM   #15
blackmega3500
 
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Lawsuit pending??

There had to be pain and suffering through your trumatic experience.........


The damages weren't worth pursuing!

Funny part is my truck actually has a full bumper-bumper warranty on it right now.

They paid for the Alternator.
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07.5 6.7l Mega-longbed conversion dually with 22.5s
EFI by ATP in Idaho, s364.5sxe/FI ETR s488 with V2 cover, s&s 135% overs, Hamilton springs/ pushrods and 188/220, suncoast Comp68 getting it all to the ground.

2014 BMW X6 ///M factory 560hp twin turbo AWD

Last edited by blackmega3500; 12-09-2018 at 10:58 AM.
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