Squeaky Serpentine (Under Load)

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Sep 14, 2022 | 10:52 AM

#16

WWR

Cargo Master

Joined: Dec 2015

Posts: 2,911

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Quote:

Originally Posted by CharlieV5

WWR,

Just saw your recent msg. I just picked up a Harmonic Balancer from O'Reilly, and have an OEM brand HB puller coming from Amazon tomorrow. Not sure if the noise that I hear, even with the belt off, is coming from the HB or possibly something that the failed HB has damaged, or...... something that was damaged causing HB to fail. I just hope that this HB fixes the issue.

I wouldn't necessarily blindly replace it. You should be able to see if it's suspect. You should be able to observe wobbling as shown in the vid and I'd imagine the squeak is from physical contact with the motor so there should be witness marks

Sep 14, 2022 | 10:58 AM

#17

WWR

Cargo Master

Joined: Dec 2015

Posts: 2,911

Likes: 504

Aye, his video is quite bad but somewhere around 3:35 he seems to suggest the noise is from the balancer moving within itself. From what little I could see of his timing cover it didn't look scarred up, but between the poor vid quality and blathering about anything OTHER than the subject of the vid, I can't say conclusively

Sep 14, 2022 | 10:59 PM

#18

CharlieV5

Thread Starter

4wd Low

Joined: Sep 2022

Posts: 11

Likes: 0

Quote:

Originally Posted by WWR

I just watched the video. I will try looking at my harmonic balancer tomorrow......maybe video it, and have my son on the gas pedal. Will let you know.

Sep 15, 2022 | 09:02 AM

#19

Djosbun

Fleet Mechanic

Joined: Oct 2017

Posts: 1,704

Likes: 164

From: Southwest Ohio

You probably have a vacuum leak where air is being sucked in through a seal when the engine is loaded. A smoke test might not locate the source but it’s worth trying. Could also have a vacuum line collapsing which causes a loud squeal. Saw this once when someone used a wiper washer hose in place of a vacuum line.

— Dave

Nov 4, 2022 | 06:04 PM

#20

CharlieV5

Thread Starter

4wd Low

Joined: Sep 2022

Posts: 11

Likes: 0

2008 f250 5.4L Squeal Under Load

Well, Since I was out of options, I replaced the Harmonic Balancer.
No change whatsoever.
I took a 2 min video, this site says its too big, so I can't share it.

Looking back over the replies, Djosbun, you may have an idea there.

Nov 4, 2022 | 06:05 PM

#21

CharlieV5

Thread Starter

4wd Low

Joined: Sep 2022

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Do you have an email addr where I can send you this video?

Nov 5, 2022 | 08:53 AM

#22

CharlieV5

Thread Starter

4wd Low

Joined: Sep 2022

Posts: 11

Likes: 0

Thanks for all your help. I was out of options, or so I thought, and went ahead
and replaced the Harmonic Balancer, no change whatsoever. I am going to
be checking for vacuum issues in a few hours.