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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: WarEagle1]
#3103669
12/19/22 06:21 PM
12/19/22 06:21 PM
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Joined: Jan 2003
Posts: 17,844
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,844
S.E. Michigan
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I had a 1978 360 do that. It turned out to be something failed internally on the fan clutch. Replaced the clutch and
problem stopped. I'd previously replaced the belt and couldn't "feel" anything wrong with the fan clutch working it by hand,
but replacing it stopped the noise.
Rich H.
Esse Quam Videri
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: ZIPPY]
#3103673
12/19/22 06:42 PM
12/19/22 06:42 PM
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Joined: Jan 2011
Posts: 15,855
Central Florida
larrymopar360
Stud Muffin
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Stud Muffin
Joined: Jan 2011
Posts: 15,855
Central Florida
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I'd feel the pulley on your water pump too and see if there's even a slight wobble. It may not be leaking yet but be getting weak.
Facts are stubborn things.
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: ZIPPY]
#3103674
12/19/22 06:43 PM
12/19/22 06:43 PM
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Joined: Jan 2011
Posts: 15,855
Central Florida
larrymopar360
Stud Muffin
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Stud Muffin
Joined: Jan 2011
Posts: 15,855
Central Florida
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I had a 1978 360 do that. It turned out to be something failed internally on the fan clutch. Replaced the clutch and
problem stopped. I'd previously replaced the belt and couldn't "feel" anything wrong with the fan clutch working it by hand,
but replacing it stopped the noise. Electric fans 
Facts are stubborn things.
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: larrymopar360]
#3103716
12/19/22 08:21 PM
12/19/22 08:21 PM
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Joined: Sep 2014
Posts: 1,405
Central Pa
moparjim79
pro stock
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pro stock
Joined: Sep 2014
Posts: 1,405
Central Pa
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I'd feel the pulley on your water pump too and see if there's even a slight wobble. It may not be leaking yet but be getting weak. Most likely this guy is the winner. I wish I had the patience to post a video, I took one after the pump started to let go on a 5.7 in a grand cherokee. No difference in operating temps, just an occasional squeel or chirp. Very embarrassing when picking the kids up from school Also, take the belt off and run it for a few seconds...
Last edited by moparjim79; 12/19/22 08:23 PM.
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: poorboy]
#3103849
12/20/22 09:53 AM
12/20/22 09:53 AM
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Joined: Jan 2011
Posts: 15,855
Central Florida
larrymopar360
Stud Muffin
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Stud Muffin
Joined: Jan 2011
Posts: 15,855
Central Florida
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The belt tensioner was causing intermittent squealing on my son's 5.7. It wasn't always keeping the belt tight. I've seen this on 3 other various year and drive train Mopars recently. Defective belt tensioners. He said he replaced both.
Facts are stubborn things.
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: Sniper]
#3103943
12/20/22 02:07 PM
12/20/22 02:07 PM
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Joined: Nov 2011
Posts: 21
ca
nick24
member
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member
Joined: Nov 2011
Posts: 21
ca
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Get a mechanic's stethoscope and start listening to various thing. No sense spending money you do not need to. From orig. post: I can't seem to isolate it with a stethoscope.
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: Sniper]
#3103954
12/20/22 02:28 PM
12/20/22 02:28 PM
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Joined: Mar 2010
Posts: 1,061
Atlanta, GA
mgoblue9798
super stock
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super stock
Joined: Mar 2010
Posts: 1,061
Atlanta, GA
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Get a mechanic's stethoscope and start listening to various thing. No sense spending money you do not need to. Or a pry bar or long screwdriver that has metal to the top of the handle.
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: larrymopar360]
#3103978
12/20/22 03:36 PM
12/20/22 03:36 PM
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Joined: Jan 2003
Posts: 10,555
Freeport IL USA
poorboy
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,555
Freeport IL USA
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The belt tensioner was causing intermittent squealing on my son's 5.7. It wasn't always keeping the belt tight. I've seen this on 3 other various year and drive train Mopars recently. Defective belt tensioners. He said he replaced both. Said he replaced the tensioner pulley and the idler pulley, nothing about the tensioner itself. They sell a kit that has both pulleys with the bearings, but does not replace the tensioner spring assembly itself.
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: poorboy]
#3104056
12/20/22 07:39 PM
12/20/22 07:39 PM
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Joined: Nov 2012
Posts: 86
Alabama
WarEagle1
OP
member
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OP
member
Joined: Nov 2012
Posts: 86
Alabama
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Hey guys, Thanks for all the responses. I did replace the tensioner pulley but not the whole tensioner assembly. May have been a mistake there. I pushed down on it slightly with a stick of wood (while running) to simulate a tighter spring and don't think it improved it. I'll look at it again. Not sure running it without the belt would tell me anything. None of the possible offenders would be turning  I'll recheck the water pump for any slop. Did this earlier and didn't notice anything amiss, but I'll make sure there's ZERO play. Any other ideas or experiences are appreciated.
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: WarEagle1]
#3104146
12/20/22 11:26 PM
12/20/22 11:26 PM
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Joined: May 2003
Posts: 3,053
N.W. Florida
Fat_Mike
master
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master
Joined: May 2003
Posts: 3,053
N.W. Florida
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My truck is an '01 Ram with a 5.2. In my experience, belts are horrible these days.
About a decade ago I had a squeal that I would have bet money was coming from my A/C pump. Took my truck to a local guy that I trusted, opened the hood and he said "that's your belt." NO WAY...it's less than a year old! He put some soap on it to prove it to me...
I think Sniper has the right answer. IF it's something other than the belt, a stethoscope might save you some money...
EDIT: BTW, I now use "lifetime" AC Delco belts (from Rock Auto) that last about 3 years, and I'm OK with that.
Last edited by Fat_Mike; 12/20/22 11:28 PM.
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: WarEagle1]
#3108018
01/03/23 02:33 PM
01/03/23 02:33 PM
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Joined: Jan 2003
Posts: 17,844
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,844
S.E. Michigan
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Oh. The fan clutch reply is interesting too. It does have a mechanical fan.
Yes..a general rule of thumb the trucks usually have a belt driven fan, the cars have electric. Not sure, usually it's a tensioner or similar on a serpentine, but just throwing the idea out there since it's a possibility. good luck
Rich H.
Esse Quam Videri
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: Fat_Mike]
#3108300
01/03/23 10:19 PM
01/03/23 10:19 PM
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Joined: Jan 2003
Posts: 10,555
Freeport IL USA
poorboy
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,555
Freeport IL USA
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My truck is an '01 Ram with a 5.2. In my experience, belts are horrible these days.
About a decade ago I had a squeal that I would have bet money was coming from my A/C pump. Took my truck to a local guy that I trusted, opened the hood and he said "that's your belt." NO WAY...it's less than a year old! He put some soap on it to prove it to me...
I think Sniper has the right answer. IF it's something other than the belt, a stethoscope might save you some money...
EDIT: BTW, I now use "lifetime" AC Delco belts (from Rock Auto) that last about 3 years, and I'm OK with that.
So, have you replaced the entire belt tensioner, or do you still think the original tensioner is OK and all those belts were the problem? I have serpentine belts that are over 6 years old that do not squeal. I have replaced a few belt tensioners though. After 5 or 6 years, the coil spring and the free movement in the tensioners don't function like they were designed to work, especially in the limited movement area they usually operate in.
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Re: Squeaking/chirping in belt drive area - 5.7 Hemi
[Re: poorboy]
#3108324
01/04/23 12:10 AM
01/04/23 12:10 AM
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Joined: May 2003
Posts: 3,053
N.W. Florida
Fat_Mike
master
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master
Joined: May 2003
Posts: 3,053
N.W. Florida
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My truck is an '01 Ram with a 5.2. In my experience, belts are horrible these days.
About a decade ago I had a squeal that I would have bet money was coming from my A/C pump. Took my truck to a local guy that I trusted, opened the hood and he said "that's your belt." NO WAY...it's less than a year old! He put some soap on it to prove it to me...
I think Sniper has the right answer. IF it's something other than the belt, a stethoscope might save you some money...
EDIT: BTW, I now use "lifetime" AC Delco belts (from Rock Auto) that last about 3 years, and I'm OK with that.
So, have you replaced the entire belt tensioner, or do you still think the original tensioner is OK and all those belts were the problem? I have serpentine belts that are over 6 years old that do not squeal. I have replaced a few belt tensioners though. After 5 or 6 years, the coil spring and the free movement in the tensioners don't function like they were designed to work, especially in the limited movement area they usually operate in. Yes. Well...remembering back (and knowing me) I'm certain I went through all that before I searched for outside help. It's possible that I missed something, but there ain't much to miss. When (not if) the chirp re-appears I'll address it without assumptions. Thanks...I needed that nudge. Do you have a specific brand of tensioner that you run?
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