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Alternator Bearing Size

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Old Apr 30, 2016 | 12:15 PM
  #1  
m90polk1's Avatar
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Icon5 Alternator Bearing Size

Hello,
I have a '96 JDM ITR motor and I'm currently rebuilding the alternator and ran into an issue. I ordered a new bearing for it because mine sounds like a bird under the hood so the bearing has to get replaced. I looked up online the bearing for the 00-01 ITR USDM alternator thinking it is the same but obviously its not. I have listed below the differences of the bearing size and the difference of 1-2mm makes a huge difference when it comes to bearing sizes. Pictures included. The shaft wobbles in the new bearing with way to much room and the new bearing won't even get close to seating properly into the casing to press it in. Has anyone replaced this before and do they know the proper part number for the bearing needed.

JDM USDM
ID:15mm ID: 17mm
OD: 45mm OD: ~46-47mm(bigger than JDM)





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Old Apr 30, 2016 | 02:38 PM
  #2  
holmesnmanny's Avatar
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Default Re: Alternator Bearing Size

Your best bet might be to find a local bearing dealer. Then just take it down there and have them measure it and match it up.
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Old Apr 30, 2016 | 05:14 PM
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m90polk1's Avatar
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Default Re: Alternator Bearing Size

Was planning on doing that but then also found out the brush set assembly is completely different than the usdm version. Basically have to mangle the brush housing to get it to fit. So I said f it and went to get a remanned one from Autozone.... But on another note any usdm Honda or acura alternators are very easy to rebuild and its only about $40 for the parts versus +$120 at the parts store.
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Old Apr 30, 2016 | 06:26 PM
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Default Re: Alternator Bearing Size

Autozone alternators are practically guaranteed to fail. Your best bet is a Denso reman from rockauto with a coupon code.

You can also download a return shipping core label from them and they will just take it out of the core.
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