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Need to replace Supercharger Bearing Pulley?

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Old 10-26-2022, 06:21 AM
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Need to replace Supercharger Bearing Pulley?

Hi Guys,

My SC Bearing Pulley is starting to make a horrible noise and am wanting to change it, but not sure what the best options are.

Can anyone help please?
Old 10-26-2022, 10:42 AM
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UDP, get all your OEM pulleys replaced while you're at it. I have changed all the pulleys and car runs great.
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Old 10-26-2022, 11:10 AM
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Originally Posted by GlazeC63Estate
Hi Guys,

My SC Bearing Pulley is starting to make a horrible noise and am wanting to change it, but not sure what the best options are.

Can anyone help please?
This should be the bearing you need:
Amazon Amazon
45BG07S5A1G-2DL NACHI
Old 10-26-2022, 01:24 PM
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HIghly recommended to do so. Its easy to do, even with basic tools

Old 10-26-2022, 03:47 PM
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Is there a Kit available anywhere? I'm in Australia
Old 10-26-2022, 03:50 PM
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Originally Posted by GlazeC63Estate
Is there a Kit available anywhere? I'm in Australia
UPD Mercedes AMG 5 Piece Performance Idler Set (ultimatepd.com)

Pulleys (ultimatepd.com)
Old 10-26-2022, 04:04 PM
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He is asking about the supercharger pulley, not the accessory pulleys.
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Old 10-26-2022, 04:05 PM
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Originally Posted by GlazeC63Estate
Is there a Kit available anywhere? I'm in Australia
It is a single bearing. No "kit" is required.

Search for a bearing made by NACHI with the part number 45BG07S5A1G-2DL
Old 10-26-2022, 04:10 PM
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Legend. I didn't know whether to change the SC Belts as well while I was at it?

Thanks again
Old 10-26-2022, 05:07 PM
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Originally Posted by MJBelcher500
He is asking about the supercharger pulley, not the accessory pulleys.
Yes, I'm aware - I linked him to all the pulleys from UDP, supercharger being one of them.
Old 10-26-2022, 05:21 PM
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Originally Posted by ArmoE55
Yes, I'm aware - I linked him to all the pulleys from UDP, supercharger being one of them.
I do not see on the page you sent the link for the bearing for the OEM supercharger pulley. I don't think he is looking for a smaller aftermarket pulley. I think he just wants to fix the stock pulley.
Old 10-27-2022, 05:09 AM
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To be clear, you want to replace the bearing, not the whole pulley, correct? Much cheaper to just replace the bearing.
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Old 10-27-2022, 05:13 AM
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Correct, just getting some quotes now for bearing only and then pulleys as well
Old 10-27-2022, 06:25 AM
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Originally Posted by GlazeC63Estate
Correct, just getting some quotes now for bearing only and then pulleys as well
here you go.

https://www.vrpspeed.com/product/nachibearing/
Old 10-27-2022, 10:38 AM
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Here.
https://www.ebay.com/itm/23197329391...mis&media=COPY




Here also.
45BG07S5A1G-2DL NACHI Supercharger Bearing Made in Japan Mercedes C55,CL55,S55 https://a.co/d/dEqA6CB


Old 10-27-2022, 12:13 PM
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Replacing the bearing and not its old stock pulley (these cars are OLD now) is like replacing the piston head and not replacing the rods - opinions are like A-holes, but mine is, you change the bearing on any pulley, might as well change the OEM pulleys too that are likely in pretty bad shape after 17+ years depending on your year. You don't want aftermarket/smaller, get a new OEM pulley.

My. 02

Originally Posted by Hrvstr1
To be clear, you want to replace the bearing, not the whole pulley, correct? Much cheaper to just replace the bearing.
There are a lot of cars that can be bought and cheaped out on - this platform isn't one of them. More issues- much more serious than a failing bearing - can result if pulleys snap, crack etc. This isn't a new car with all kinds of warranties; the majority of owners have no warranties nowadays - it's an old car now that requires maintenance (not Toyota Camry maintenance either, these were $85+ cars when new in early 2000s, so the maintenance is on par with someone buying damn close to $100K car back in 2003) , regardless of miles but simply due to age.

Last edited by ArmoE55; 10-27-2022 at 03:31 PM.
Old 10-27-2022, 01:14 PM
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Originally Posted by ArmoE55
Replacing the bearing and not its old stock pulley (these cars are OLD now) is like replacing the piston head and not replacing the rods - opinions are like A-holes, but mine is, you change the bearing on any pulley, might as well change the OEM pulleys too that are likely in pretty bad shape after 17+ years depending on your year. You don't want aftermarket/smaller, get a new OEM pulley.

My. 02



There are a lot of cars that can be bought and cheaped out on - this platform isn't one of them. More issues- much more serious than a failing bearing - can result if pulleys snap, crack etc. This isn't a new car with all kinds of warranties; the majority of owners have no warranties nowadays - it's an old car now that requires maintenance , regardless of miles but simply due to age.
While agree with you that a number of parts are best replaced than repaired, it would not appear the SC pulley is one of them. This is a common fix and I have not seen cases where the OEM pulley fails/explodes after a bearing is replaced. What have you seen that would make replacement OEM pulley (if you can find a new one) necessary over replacing the bearing?
Old 10-28-2022, 05:14 AM
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Originally Posted by ArmoE55
Replacing the bearing and not its old stock pulley (these cars are OLD now) is like replacing the piston head and not replacing the rods - opinions are like A-holes, but mine is, you change the bearing on any pulley, might as well change the OEM pulleys too that are likely in pretty bad shape after 17+ years depending on your year. You don't want aftermarket/smaller, get a new OEM pulley.

My. 02



There are a lot of cars that can be bought and cheaped out on - this platform isn't one of them. More issues- much more serious than a failing bearing - can result if pulleys snap, crack etc. This isn't a new car with all kinds of warranties; the majority of owners have no warranties nowadays - it's an old car now that requires maintenance (not Toyota Camry maintenance either, these were $85+ cars when new in early 2000s, so the maintenance is on par with someone buying damn close to $100K car back in 2003) , regardless of miles but simply due to age.
No need to replace the entire pulley unless it’s been damaged somehow. Just replace the bearing. I’m an industrial maintenance technician. I work on million dollar pieces of equipment daily. Some of the equipment is over 40 years old. I have sheaves that are on their 4th or 5th bearing that are still completely intact that run 24 hours a day. Your argument has no data to back it up.
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Old 10-28-2022, 10:16 AM
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Originally Posted by Hrvstr1
No need to replace the entire pulley unless it’s been damaged somehow. Just replace the bearing. I’m an industrial maintenance technician. I work on million dollar pieces of equipment daily. Some of the equipment is over 40 years old. I have sheaves that are on their 4th or 5th bearing that are still completely intact that run 24 hours a day. Your argument has no data to back it up.
I too agree bearing replacement is favorable and a dramatic cost savings. When I bought my car a couple of years ago I updated all the pulleys and idlers with new bearings wherever possbile and when I had to replace the pulley, I used a quality aftermarket provider. Total cost of the freshening-up was $65 compared to buying them from MB at $1,400 retail.
Old 10-28-2022, 10:19 AM
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Originally Posted by Hrvstr1
No need to replace the entire pulley unless it’s been damaged somehow. Just replace the bearing. I’m an industrial maintenance technician. I work on million dollar pieces of equipment daily. Some of the equipment is over 40 years old. I have sheaves that are on their 4th or 5th bearing that are still completely intact that run 24 hours a day. Your argument has no data to back it up.
But comparing million-dollar equipment you work on to a used car that is 17+ years old and ultimately costs a FRACTION of what you're comparing (vs. car industry) is logical and makes sense. Great argument you got... keep going.

Last edited by ArmoE55; 10-28-2022 at 10:25 AM.
Old 10-28-2022, 11:44 PM
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I’m just amazed this is still be discussed. Just like it has a dozen of other times. Lol

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