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Idler Pulley Broke In Half Will These Aftermarket Ones Work?
My inner (plastic) idler pulley just broke in half and shredded my new serpentine belt! I have been reading older threads about people using the Dayco 89130 aftermarket and Autozone sells a similar one 231070. I cannot find anything new on this. I really don’t want to spend the money on two new pulleys when I just need one. Anybody have any input on this? Are there any mods that need to be done for aftermarket? |
I just installed another Dayco 89130 on my car along with a replacement bearing for the metal pulley. 60K miles on the older Dayco and it was doing fine; could have gone much further but I'm a stickler for replacing every 60,000 miles. Since you have to take it apart, go ahead and replace the bearing in the metal pulley. NSK or Nachi 6203-ZZC3 bearing is rated for 17,000 rpm; cheaper bearings are only rated for 12,000 rpm and the seals leak the grease out of the bearings.
The fan shroud is close to the bolt for the supercharger idler pulley, I found it best to use an 8mm box wrench around the Torx bit. If you can get a torque wrench onto the bolt, WIS calls for 58-60N-m; call it 42-44 ft-lbs. |
Thank you very much for all the info! I have a couple more questions. How do you get the two pulleys apart? The SC pulley slightly wobbles, what could be causing that? How do you get the old bearing out if I wanted to replace the one on the SC pulley as well? Thanks
Originally Posted by bbirdwell
(Post 7586950)
I just installed another Dayco 89130 on my car along with a replacement bearing for the metal pulley. 60K miles on the older Dayco and it was doing fine; could have gone much further but I'm a stickler for replacing every 60,000 miles. Since you have to take it apart, go ahead and replace the bearing in the metal pulley. NSK or Nachi 6203-ZZC3 bearing is rated for 17,000 rpm; cheaper bearings are only rated for 12,000 rpm and the seals leak the grease out of the bearings.
The fan shroud is close to the bolt for the supercharger idler pulley, I found it best to use an 8mm box wrench around the Torx bit. If you can get a torque wrench onto the bolt, WIS calls for 58-60N-m; call it 42-44 ft-lbs. |
x2 on what bbirdwell said.
I went through the exact same headache last week. Mr. bbirdwell provide lots of details . Parts ordered via Amazon. I removed the fan shrout, to get better access, discovered hoses were old... Go slow, take your time, be care... |
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Originally Posted by bbirdwell
(Post 7586950)
I just installed another Dayco 89130 on my car along with a replacement bearing for the metal pulley. 60K miles on the older Dayco and it was doing fine; could have gone much further but I'm a stickler for replacing every 60,000 miles. Since you have to take it apart, go ahead and replace the bearing in the metal pulley. NSK or Nachi 6203-ZZC3 bearing is rated for 17,000 rpm; cheaper bearings are only rated for 12,000 rpm and the seals leak the grease out of the bearings.
The fan shroud is close to the bolt for the supercharger idler pulley, I found it best to use an 8mm box wrench around the Torx bit. If you can get a torque wrench onto the bolt, WIS calls for 58-60N-m; call it 42-44 ft-lbs. |
Originally Posted by StarvingArtist
(Post 7587251)
I'm due for a replacement also. Where did you find that bearing. I found it on amazon for $6.35 + $20 shipping. Seems a little over the top on shipping. I have prime, but it didn't show up that way.
NSK 6203ZZC3 Deep Groove Ball Bearing, Single Row, Double Shielded, Pressed Steel Cage, C3 Clearance, Metric, 17mm Bore, 40mm OD, 12mm Width, 17000rpm Maximum Rotational Speed, 1079lbf Static Load Capacity, 2147lbf Dynamic Load Capacity |
Originally Posted by sidewayzgt
(Post 7587153)
Thank you very much for all the info! I have a couple more questions. How do you get the two pulleys apart? The SC pulley slightly wobbles, what could be causing that? How do you get the old bearing out if I wanted to replace the one on the SC pulley as well? Thanks https://mbworld.org/forums/w211-amg/...uild-27-a.html |
Originally Posted by bbirdwell
(Post 7587588)
$11.74 Prime. This is the one I just installed.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 NSK 6203ZZC3 Deep Groove Ball Bearing, Single Row, Double Shielded, Pressed Steel Cage, C3 Clearance, Metric, 17mm Bore, 40mm OD, 12mm Width, 17000rpm Maximum Rotational Speed, 1079lbf Static Load Capacity, 2147lbf Dynamic Load Capacity |
For those looking to possibly change in the future. Amazon has them now for $6.99. Doesn't hurt to have 1 or 2 on standby by. Easy PM item.
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