Growling sound around the water pump or compressor

Posted in the Chevrolet TrailBlazer Forum

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crginc

Saint Louis, MO

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#1
Jan 9, 2008
 
I have a 2006 4x4 TB that started getting a growling sound around the alternator, water pump, or compressor. It sounds like the power steering pump going out but it's on the drivers side and doesn't change when you turn the wheels. One mechanic told me it was a bearing in the alternator so I replaced the alternator, nope, not the alternator. It sounds like it's low on the drivers side and is getting louder. The water pump is not leaking and the a/c works fine. The noise gets louder with accelaration and quiets when you slow down. All the guages show normal pressures and temps. Any ideas or anyone else had this problem?
Leroy Dedmon

Dalton, GA

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#2
Jan 14, 2008
 
My 2006 TB makes a low whistle sound, kinda like a teapot boiling. It seems it only does this when the air conditioner is on. One mechanic told me it sounded like a belt slipping. I put a dab of oil on it, but it did not stop.
chris

United States

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#3
Jan 14, 2008
 
I have a 2006 4x4 TB that started getting a growling sound around the alternator, water pump, or compressor. It sounds like the power steering pump going out but it's on the drivers side and doesn't change when you turn the wheels. One mechanic told me it was a bearing in the alternator so I replaced the alternator, nope, not the alternator. It sounds like it's low on the drivers side and is getting louder. The water pump is not leaking and the a/c works fine. The noise gets louder with accelaration and quiets when you slow down. All the guages show normal pressures and temps. Any ideas or anyone else had this problem?[[The problem is the bearing in the idler pulley.Replace the pulley assembly, cost is usually around $15-20. Some aftermarket ones will not require the large washer affixed to your original. Hope this helps.]
chris

United States

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#4
Jan 14, 2008
 
Leroy Dedmon wrote:
My 2006 TB makes a low whistle sound, kinda like a teapot boiling. It seems it only does this when the air conditioner is on. One mechanic told me it sounded like a belt slipping. I put a dab of oil on it, but it did not stop.
?[If the noise changes with acceleration then the problem is also the bearing in the idler pulley.Try holding a long screwdriver on the suspected problem area and place the handle end up to your ear and you can actually hear where the problem is coming from. Careful not to get tangled in the belt or moving engine parts. Replace the pulley assembly, cost is usually around $15-20. Some aftermarket ones will not require the large washer affixed to your original. Hope this helps.]
Tim

Wilmington, DE

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#5
Jan 16, 2008
 
I just bought a used 2005 TB and I'm having a similar issue - but I only hear the noise when I shut the engne off. Souns like someting is still running under the hood. It winds down after about 5 seconds - and only seems to do this when the engine is cold. SOunds like a bearing spinning or something.
crginc wrote:
I have a 2006 4x4 TB that started getting a growling sound around the alternator, water pump, or compressor. It sounds like the power steering pump going out but it's on the drivers side and doesn't change when you turn the wheels. One mechanic told me it was a bearing in the alternator so I replaced the alternator, nope, not the alternator. It sounds like it's low on the drivers side and is getting louder. The water pump is not leaking and the a/c works fine. The noise gets louder with accelaration and quiets when you slow down. All the guages show normal pressures and temps. Any ideas or anyone else had this problem?
Bryan

United States

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#6
Mar 10, 2008
 
It is most likely the fan clutch $200-$300
Randy

Emporia, KS

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#7
Apr 29, 2011
 
Tried the screwdriver route, heard noise in the alternator, replaced it, still had a growl. Waterpump bearing was bad, could move the pulley and fan assembly, replaced pump, still had growl. Removed belt and started motor, no growl. Will try the idler bearing next simply because it's a cheap and easy R&R. I'm leaning more towards the fan clutch as being the problem myself.
Randy

Emporia, KS

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#8
May 4, 2011
 
Mystery noise solved. Bought new idler bearing, removed old bearing including the large washer behind the bolt. Installed the new idler using the old washer which was cone shaped. Re-installed the belt and started the motor, the new idler took care of the original growl noise, but there was a new noise then. Checked the tightness of the bolt on the idler, it had come loose and the washer was rattling. Tightened it again and restarted the motor, sounded good briefly, then began rattling like it was loose again. Removed the bolt and original washer, replaced the washer with a new flat washer, tightened and started the motor.

The original idler bearing was good, I believe the problem noise was being made by the cone shaped washer all along!

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