What is this noise after belt change?

[tophat36]

Swapped my alternator belt out and it was squealing something crazy so I tightened it. Noise went away. Got some new metal wipers I was excited to swap out and sprayed some water to test. Went for a test drive for about 5 minutes. Started to hear a super high pitched noise when the truck was in motion. No noise when stopped. Is this something to do with the belt…a bearing maybe? Is the belt too tight? How could it be the belt if it stops when the car stops moving? Link to video below.

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[xm20k]

Brake squeak or maybe wheel bearing as it's only while moving.

 

[tophat36]

Brake squeak or maybe wheel bearing as it's only while moving.

What would cause this out of nowhere, drove the truck just yesterday and nothing like this sound.

 

[Chevy 88]

Lets start with this:

What's up with your dash?

 

[tophat36]

Lets start with this:

What's up with your dash?

Gutted the interior, that is all. Pulled headliner, carpets, trim, dash pad, crap radio, passenger door panel, etc. I’ve spent the majority of what little time I have focusing on mechanical things. Cosmetic stuff will have to wait, it’s less important.

 

[SquareRoot]

Lets start with this:

What's up with your dash?

 

[Sad Sack]

As xm20k stated check to see if front disc pads squeaker (if equipped) is touching the rotor or pads being shot. Then on the bearing, grab a thermal gun and take temp of bearing area on each side and compare after a drive, if a bearing issue exists it may be hotter than normal and show with the temp gun to tell what side may be affected - if it is a bearing issue.

 

[tophat36]

As xm20k stated check to see if front disc pads squeaker (if equipped) is touching the rotor or pads being shot. Then on the bearing, grab a thermal gun and take temp of bearing area on each side and compare after a drive, if a bearing issue exists it may be hotter than normal and show with the temp gun to tell what side may be affected - if it is a bearing issue.

Entire front end is redone including wheel bearings and calipers. I’ll check the brakes this weekend. I actually have one of those temp guns so I’ll check bearing temp as well. How long of a drive do you think is needed for the temperature difference to show up?

 

[Sad Sack]

Entire front end is redone including wheel bearings and calipers. I’ll check the brakes this weekend. I actually have one of those temp guns so I’ll check bearing temp as well. How long of a drive do you think is needed for the temperature difference to show up?

Well, maybe 15ish minutes.

 

[Grit dog]

Lets start with this:

What's up with your dash?

Weird reply….typical.

 

[Hunter79764]

If you are thinking belt related, maybe the tightened belt put some extra side load on the alternator or something? Get some tubing to act as a stethoscope and see if you can hear it, probably engine speed dependent after it warms up? If not, then coincidence on the belt and check all the other stuff.

Is it a constant noise, or pulsing? Any idea if it changes with vehicle speed, engine speed, or driveshaft speed? See if you can find a construction zone with concrete barriers, that can help you determine where the noise is originating.

Side story, I had my wife's old truck start making a soft grinding, seemed to come from the back, not the front. Both hubs had the same heat signature, and didn't sound like it was driver side or passenger, maybe the middle? But didn't sound like a bad differential either. I was in the process of jacking it up to see about running it in gear on stands (not great, I know, but was making efforts to do it as safely as possible) when I found the culprit. A cardboard box she had stuffed between the cab and bed MONTHS before slipped down and was riding on the driveshaft. So keep an eye out for anything out of place, sometimes cars do weird stuff...

 

[xm20k]

If it was a belt, it would be odd to only squeak while the vehicle is rolling another thing I just thought of could be speedo cable.

 

[83Stepper]

Squealing only while moving tells me that it's solely in the driveline related parts Can you tell if it's coming from the front or rear of the vehicle, and 2wd or 4wd? It doesn't make noise until moving forward, does it also happen in reverse or just moving forward? Could be something as simple as a dust shield rubbing against a rotor or a pad sticking/squeal pad, or something a bit more in depth. Start with the easy ones first such as something potentially rubbing against another part. You can try jacking up the front end of the truck and spinning each front side tire to see if it continues to make noise, this way you can pinpoint where it's coming from.

 

[tophat36]

If it was a belt, it would be odd to only squeak while the vehicle is rolling another thing I just thought of could be speedo cable.

My same thought about being in motion. I lubricated the speedo cable in the cab a while ago and this is a different sound then it used to make. There are 2 speedo lines though. I could check the one that goes into the transmission maybe?

 

[tophat36]

Squealing only while moving tells me that it's solely in the driveline related parts Can you tell if it's coming from the front or rear of the vehicle, and 2wd or 4wd? It doesn't make noise until moving forward, does it also happen in reverse or just moving forward? Could be something as simple as a dust shield rubbing against a rotor or a pad sticking/squeal pad, or something a bit more in depth. Start with the easy ones first such as something potentially rubbing against another part. You can try jacking up the front end of the truck and spinning each front side tire to see if it continues to make noise, this way you can pinpoint where it's coming from.

I think it’s coming from the front. Truck is a C20 so 2WD. No noise when stopped but didn’t check reverse. I think I did reverse it when I was parking and don’t remember hearing it but I’ll test it again. I’ll drive it first to see if it’s still making the noise, then do all the checks. Thanks!