SRT clutch noise - A/C or SC ???
SRT clutch noise - A/C or SC ???
I had first problem today that is puzzling. With hood up and engine cover off, when I turn on the A/C (normally it's on all the time here in FL) I hear a really ugly noise that sounds like it is coming from the Supercharger clutch on top and not from the A/C clutch down low. Turn A/C off and noise stops. When A/C is on, the engine fan comes on automatically creating some more under hood noise that sounds normal. Does anyone know if turning on the A/C also activates the SC clutch?
Karl
Karl
Re: SRT clutch noise - A/C or SC ???
Originally Posted by kldiet
... Does anyone know if turning on the A/C also activates the SC clutch?...
Seems as if your A/C compressor or its mounts are in need of attention. The supercharger pulley bearing rarely fails before 50K miles.
Re: SRT clutch noise - A/C or SC ??? Update
So I was finishing up installing my LET Phenolic spacers and while the cover was off, I had another listen to the noise coming from the top of the engine. Definitely coming from the now "infamous" stock pulley on the front of the supercharger. Has anyone had a stock pulley go bad, as opposed to replacing good original with the Code 3 or LET pulley?
So engine is cold, idling (I am actually checking for air leaks in the air boxes from the spacer install). It appears that when I activate the A/C pump, that puts an additional load on the belt that makes the pulley noise 10 times worse, so I suspect a bad pulley as opposed to a bad SC clutch (or are these one in the same unit)?
I have 40K miles on the car and got an extended warranty. The dealer will only cover putting on a replacement stock pulley if this turns out to be the problem. Need a way for the warranty to pay for the new non-stock pulley.
Karl
Doover 2009
So engine is cold, idling (I am actually checking for air leaks in the air boxes from the spacer install). It appears that when I activate the A/C pump, that puts an additional load on the belt that makes the pulley noise 10 times worse, so I suspect a bad pulley as opposed to a bad SC clutch (or are these one in the same unit)?
I have 40K miles on the car and got an extended warranty. The dealer will only cover putting on a replacement stock pulley if this turns out to be the problem. Need a way for the warranty to pay for the new non-stock pulley.
Karl
Doover 2009
Re: SRT clutch noise - A/C or SC ???
Ah, okay.
The supercharger pulley bearing is a part within the supercharger pulley assembly. It’s readily replaceable, although seldom done by dealerships. They tend to replace the entire assembly.
Bearing replacement:
http://forums.mbworld.org/forums/sho...3&postcount=55
Bearing source:
http://shop.code3performance.com/pro...=3&productId=5
Good luck.
The supercharger pulley bearing is a part within the supercharger pulley assembly. It’s readily replaceable, although seldom done by dealerships. They tend to replace the entire assembly.
Bearing replacement:
http://forums.mbworld.org/forums/sho...3&postcount=55
Bearing source:
http://shop.code3performance.com/pro...=3&productId=5
Good luck.
Re: SRT clutch noise - A/C or SC ???
That was a great video and the sound is exactly what I am hearing. THANKS! I love this forum and all the great information available.
So, I have a bad SC pulley bearing. Now the next question is how much $$$ to spend to get it fixed.... $35 or $700. Since the bearing ($35) is the major part within any after market pulley, I wonder why an after market replacement pulley is soooooo bloody expensive? If you think of all the engineering that goes into a modern day PC (~$500) and all the finely machined parts in the box, I can't understand why a simple pulley (without the main bearing piece we know cost $35) costs $650. Or why is that a lot of us have shelled out $80-$100 bucks for fifty cents worth of phenolic plastic. My company makes the plastic pellets that is sold to the auto industry and that sells for $1 a pound. Please don't get me wrong. I love well engineered stuff and don't mind paying a reasonable price. But someone please explain why a pulley should cost $700 and a PC $400? I know the first response to this question, so I'll save you the time; "You can't make a PC turn your SC".
So, I have a bad SC pulley bearing. Now the next question is how much $$$ to spend to get it fixed.... $35 or $700. Since the bearing ($35) is the major part within any after market pulley, I wonder why an after market replacement pulley is soooooo bloody expensive? If you think of all the engineering that goes into a modern day PC (~$500) and all the finely machined parts in the box, I can't understand why a simple pulley (without the main bearing piece we know cost $35) costs $650. Or why is that a lot of us have shelled out $80-$100 bucks for fifty cents worth of phenolic plastic. My company makes the plastic pellets that is sold to the auto industry and that sells for $1 a pound. Please don't get me wrong. I love well engineered stuff and don't mind paying a reasonable price. But someone please explain why a pulley should cost $700 and a PC $400? I know the first response to this question, so I'll save you the time; "You can't make a PC turn your SC".
Re: SRT clutch noise - A/C or SC ???
Originally Posted by kldiet
That was a great video and the sound is exactly what I am hearing. THANKS! I love this forum and all the great information available.
So, I have a bad SC pulley bearing. Now the next question is how much $$$ to spend to get it fixed.... $35 or $700. Since the bearing ($35) is the major part within any after market pulley, I wonder why an after market replacement pulley is soooooo bloody expensive? If you think of all the engineering that goes into a modern day PC (~$500) and all the finely machined parts in the box, I can't understand why a simple pulley (without the main bearing piece we know cost $35) costs $650. Or why is that a lot of us have shelled out $80-$100 bucks for fifty cents worth of phenolic plastic. My company makes the plastic pellets that is sold to the auto industry and that sells for $1 a pound. Please don't get me wrong. I love well engineered stuff and don't mind paying a reasonable price. But someone please explain why a pulley should cost $700 and a PC $400? I know the first response to this question, so I'll save you the time; "You can't make a PC turn your SC".
So, I have a bad SC pulley bearing. Now the next question is how much $$$ to spend to get it fixed.... $35 or $700. Since the bearing ($35) is the major part within any after market pulley, I wonder why an after market replacement pulley is soooooo bloody expensive? If you think of all the engineering that goes into a modern day PC (~$500) and all the finely machined parts in the box, I can't understand why a simple pulley (without the main bearing piece we know cost $35) costs $650. Or why is that a lot of us have shelled out $80-$100 bucks for fifty cents worth of phenolic plastic. My company makes the plastic pellets that is sold to the auto industry and that sells for $1 a pound. Please don't get me wrong. I love well engineered stuff and don't mind paying a reasonable price. But someone please explain why a pulley should cost $700 and a PC $400? I know the first response to this question, so I'll save you the time; "You can't make a PC turn your SC".
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