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Question for automotive experts. #15989583 04/13/21
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OldmanoftheSea Online Content OP
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Truck made a strange noise at start-up the other day.
Similar to a belt squeal, but definitely different
I checked the belt, (even though it is new)

There was a glob of something on the surface of the idler pully which I cleaned off but that didn't cure it.

I noticed a black gummy substance at the boundary of the inner and outer portions of the AC compressor pully, so:
I turned off the a/c and restarted then the noise went away even after I turned the a.c. back on.

Any ideas?

Edit:
The a.c. clutch functions / stops if I pull the clutch relay fuse.

Last edited by OldmanoftheSea; 04/13/21.

-OMotS



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Re: Question for automotive experts. [Re: OldmanoftheSea] #15989864 04/13/21
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CCCC Offline
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Does the A/C compressor spin and compress?


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Re: Question for automotive experts. [Re: OldmanoftheSea] #15989888 04/13/21
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Most of the time idler pully bearing.


Maybe we're all happy.
Re: Question for automotive experts. [Re: FatCity67] #15989913 04/13/21
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Originally Posted by FatCity67
Most of the time idler pully bearing.

Had a few idler pulley go bad & squeak, also had a water pump squeal before it went.


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Re: Question for automotive experts. [Re: CCCC] #15989914 04/13/21
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Originally Posted by CCCC
Does the A/C compressor spin and compress?


It spins and idles with the clutch disengaged/engaged (or is the clutch action reversed on a.c.?) Using the relay fuse to trigger the magnet.
So
It does cycle on and off (I haven't watched it long enough to see if it auto cycles..

It seems like the seats blow cold, but not the dash

As far as compressing, I suppose I need to borrow a set of gauges to test the high and low sides.


-OMotS



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IC-A

Re: Question for automotive experts. [Re: Jiveturkey] #15989957 04/13/21
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Originally Posted by Jiveturkey
Originally Posted by FatCity67
Most of the time idler pully bearing.

Had a few idler pulley go bad & squeak, also had a water pump squeal before it went.


I pulled, checked and lubed all the idler bearings when I did the belt and they are all quiet.

My primary concern was the black stuff at the clutch/pully interface..


-OMotS



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Quote: ( unnamed) "been prtty deep in the cooler todaay "
Re: Question for automotive experts. [Re: OldmanoftheSea] #15990188 04/13/21
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I don't see how system fluids (oil /coolant) could come out the shaft side of the compressor, but I don't have a great understanding of the interior structure of the compressor.


-OMotS



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Re: Question for automotive experts. [Re: OldmanoftheSea] #15990194 04/13/21
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slumlord Online Content
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Kitten juice

Re: Question for automotive experts. [Re: slumlord] #15990202 04/13/21
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Originally Posted by slumlord
Kitten juice

I was going to post "pussy juice"...

John

Re: Question for automotive experts. [Re: OldmanoftheSea] #15990205 04/13/21
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I have bought cheap belts that do that.

IC-B

Re: Question for automotive experts. [Re: OldmanoftheSea] #15990217 04/13/21
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Use Seafoam....

Spray it all in the engine compartment just as the sun is going down below the horizon ( important step on the insrtuctions in really fine print)
Coat the entire engine compartment...



Seafoam Mechanic in a can will find the problem ( and any others) your vehicle will be show room new๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘ with a nice wax job by sunrise.

I schitt you not!!!




Last edited by renegade50; 04/13/21.

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Re: Question for automotive experts. [Re: renegade50] #15990227 04/13/21
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Seafoam

??


Thanks Mr Obvious, youre a lifesaver

Re: Question for automotive experts. [Re: OldmanoftheSea] #15990231 04/13/21
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Morewood Online Content
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Check the blinker fluid.

Re: Question for automotive experts. [Re: OldmanoftheSea] #15990246 04/13/21
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If the drive belt is at correct tension and has a bit of belt dressing applied, it will not make noise. A dying pulley bearing my give intermittent noise/squeal - the idler or the compressor in this case. Try using a stethoscope applied as closely as possible to the bearing housing to detect rumble/rattle indicating incipient failure.

I don't try to use a medical type scope in such cases - use one with a straight rod (someone makes/sells them) BUT the best for me is one I have made - a small can with a long rod through the bottom (thin welding rod?) - tip of rod on the moving part and can cupped to the ear. Easy to hear internal noises and bearing noise will be apparent..

If you heard the squeal from inside the vehicle, it could be a fan motor noise - including a squeal - sometimes happens only on start-up.


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Re: Question for automotive experts. [Re: OldmanoftheSea] #15990251 04/13/21
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The idler pulleys I've had that went bad did not make a sound with the belt off, only with a load on them did they make noise. Compressor does have oil in it that could leak I suppose, but freon would leak also. I am in no way an automotive expert.


Romans 5:1
Re: Question for automotive experts. [Re: Morewood] #15990260 04/13/21
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Originally Posted by Morewood
Check the blinker fluid.

Got some of the black stuff in my eye now I have plenty of blinker fluid...


Clutch dust is reddish brown. right?

Many it's just glopped clutch dust from having the a.c. on while going through the carwash...or maybe lizard guts.

Last edited by OldmanoftheSea; 04/13/21.

-OMotS



"If memory serves fails me..."
Quote: ( unnamed) "been prtty deep in the cooler todaay "
Re: Question for automotive experts. [Re: OldmanoftheSea] #15990280 04/13/21
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Originally Posted by OldmanoftheSea
Originally Posted by Morewood
Check the blinker fluid.

Got some of the black stuff in my eye now I have plenty of blinker fluid...


Clutch dust is reddish brown. right?

Many it's just hopped clutch dust from having the a.c. on while going through the carwash...or maybe lizard guts.

Seafoam cleans ALL animal guts off automotive components.
That's in the fine print instructions too.


Liberal Socialist Democrats and their voters are a bane to this Nation.
Re: Question for automotive experts. [Re: OldmanoftheSea] #15990561 04/13/21
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Never underestimate the fan clutch! They will be a different sounding more like a chirp in my experience ๐Ÿคทโ€โ™‚๏ธ

Re: Question for automotive experts. [Re: MPat70] #15990746 04/13/21
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Originally Posted by MPat70
Never underestimate the fan clutch! They will be a different sounding more like a chirp in my experience ๐Ÿคทโ€โ™‚๏ธ

Got electric fans...


-OMotS



"If memory serves fails me..."
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Re: Question for automotive experts. [Re: OldmanoftheSea] #15990755 04/13/21
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gregintenn Online Content
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Doesnโ€™t the compressor pulley ride on a bearing when the compressor is not engaged? Couldnโ€™t that bearing go bad?

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