FrazerJames Posted August 15, 2020 Share Posted August 15, 2020 Trying to switch out to a new 3G alternator this weekend. I have the v belt pulley and have the shims - or at least what I thought would work. I have. 5/8 ID shim that fits around the threads easy, but this alternator’s stud expands after the threads. I tried going the next size shim up (3/4) and it’s too big. I’m having trouble finding anything in between. Any thoughts? Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted August 15, 2020 Share Posted August 15, 2020 The shaft is 17mm in diameter. Have you tried a metric washer? Link to comment Share on other sites More sharing options...
FrazerJames Posted August 15, 2020 Author Share Posted August 15, 2020 The shaft is 17mm in diameter. Have you tried a metric washer? I was under the impression I can’t just use any washer - that it had to be a machine bushing? Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted August 15, 2020 Share Posted August 15, 2020 I was under the impression I can’t just use any washer - that it had to be a machine bushing? You don't need to get crazy with it. The belt can handle a little misalignment. You just need to get the pulley off the case (IF it rubs) I think FSB has a thread that shows a shim package from Home Depot that fits. But I've never had a problem with a reasonably clean flat washer. Link to comment Share on other sites More sharing options...
Gary Lewis Posted August 15, 2020 Share Posted August 15, 2020 You don't need to get crazy with it. The belt can handle a little misalignment. You just need to get the pulley off the case (IF it rubs) I think FSB has a thread that shows a shim package from Home Depot that fits. But I've never had a problem with a reasonably clean flat washer. Jim - We have info on the spacer on our page at Documentation/Electrical/3G Upgrade. Here's the pic of the package from Home Depot: Link to comment Share on other sites More sharing options...
FrazerJames Posted August 15, 2020 Author Share Posted August 15, 2020 You don't need to get crazy with it. The belt can handle a little misalignment. You just need to get the pulley off the case (IF it rubs) I think FSB has a thread that shows a shim package from Home Depot that fits. But I've never had a problem with a reasonably clean flat washer. So do you think I can try the bushing that’s a little large? I can’t imagine if it’s tight that it won’t move much. Link to comment Share on other sites More sharing options...
FrazerJames Posted August 15, 2020 Author Share Posted August 15, 2020 So do you think I can try the bushing that’s a little large? I can’t imagine if it’s tight that it won’t move much. Gary, that 5/8th won’t fit over that shaft on this one. It flares out to 17/25ths. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted August 15, 2020 Share Posted August 15, 2020 Gary, that 5/8th won’t fit over that shaft on this one. It flares out to 17/25ths. Imperial washers tend to be really sloppy. I wouldn't doubt a 5/8 washer would fit where a tight fitting machine bushing won't. Link to comment Share on other sites More sharing options...
Rusty_S85 Posted August 15, 2020 Share Posted August 15, 2020 Jim - We have info on the spacer on our page at Documentation/Electrical/3G Upgrade. Here's the pic of the package from Home Depot: I read the VW pulley shims are the exact size we need for the pulley shim for a 3G. https://www.ebay.com/itm/VOLKSWAGEN-VW-PORSCHE-GENERATOR-ALTERNATOR-0-50mm-PULLEY-SHIMS-10-PACK/172249694859?hash=item281ae1c28b:g:jHIAAOSwMNxXabid Thats the one I have saved on my ebay wish list at the time when I was still on the fence. Link to comment Share on other sites More sharing options...
FrazerJames Posted August 15, 2020 Author Share Posted August 15, 2020 Imperial washers tend to be really sloppy. I wouldn't doubt a 5/8 washer would fit where a tight fitting machine bushing won't. That makes sense on a regular washer, but the image of the Home Depot package shows those are machine bushings. I’m wondering if it’s just this model of alternator. The thread part is definitely 5/8. The bushing I have fits over that just fine. Link to comment Share on other sites More sharing options...
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