Strange Noise
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I am getting a strange whining noise when the truck is running. People have said that it is the power steering, but the pump was replaced not long ago and the fluid is full. I have heard that it could be the fan clutch. Anyone have any helpful input?
Jim Blask
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The only Lifted TB in the Valley
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- Blask3
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we need more specific info about the whine. is it there when your driving or just at idle? is it directly related to RPM?
Many of us had to replace idler pulleys cause of failed bearings. That may be what your looking for.
Many of us had to replace idler pulleys cause of failed bearings. That may be what your looking for.
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If its related to RPM's then it most likely the idler pulley. Just replaced mine a few weeks ago b/c I was hearing a 'supercharger' type whine related to RPM's. These problems really can be found quickly on the OS. I solved mine on my own in about 10 min.
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It is a supercharger type whine and it is related to the RPMs. When I accelerate it gets louder and it gets quiet when the truck shifts or I let off the gas. I am going to replace the Idler Pulley and see if that fixes the issue.
Jim Blask
GIT-R-DONE
The only Lifted TB in the Valley
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Yep, most likely is your problem, exactly what I had going on. If its just that, it will save you $$, since its only a $20 part.
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Im gonna give it a shot and see if it works. I will do it this afternoon. Thanks for the input boys.
Jim Blask
GIT-R-DONE
The only Lifted TB in the Valley
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Blask3 wrote:...it gets quiet when the truck shifts or I let off the gas...
That's what confuses me - I don't remember my idler doing that when it went bad.
But as was said before - minimal investment to change it. $20 and 20 minutes.
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If that doesn't work, you could consider a possible alternator failure in the future. Do you have any additional loads on the charging system? Stereo, lighting, etc..
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e if the AC clutch is engaged or not?
Harbor Fright has cheap mechanics stethoscopes to assist localizing the noise, or you can use a long dowel or piece of rebar. I got the stethoscope recently on sale for about $3, I think, but I used to use my specific favorite length of rebar that I also use to pound on CV shafts for extraction.
Harbor Fright has cheap mechanics stethoscopes to assist localizing the noise, or you can use a long dowel or piece of rebar. I got the stethoscope recently on sale for about $3, I think, but I used to use my specific favorite length of rebar that I also use to pound on CV shafts for extraction.
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All I have on the charging system are my emergency light for the fire department and those are only on when I turn them on.
As for the AC clutch I have no clue. I am going to spend the $20 to replace the pulley and see if that solves the problem. If it doesn't then I will have to look into it further. I hope the pulley is the problem so I dont have to put alot of money into it. I have other projects to do.
As for the AC clutch I have no clue. I am going to spend the $20 to replace the pulley and see if that solves the problem. If it doesn't then I will have to look into it further. I hope the pulley is the problem so I dont have to put alot of money into it. I have other projects to do.
Jim Blask
GIT-R-DONE
The only Lifted TB in the Valley
GIT-R-DONE
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Put a new pulley on and the noise went away. Now on to other projects that I have in mind. Thanks for the help guys.
Jim Blask
GIT-R-DONE
The only Lifted TB in the Valley
GIT-R-DONE
The only Lifted TB in the Valley
- Blask3
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- Joined: Thu Aug 26, 2010 7:22 pm
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- Vehicle: Chevrolet TrailBlazer
- DriveTrain: 4WD
It's the season of bad pulleys
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