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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHAlternator pulley interchangeably
Leading reported evidence
Install bosch alternator
Performed · outcome unconfirmed
No successful repair reported for this finding.
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Read evidence and context
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Performed · outcome unconfirmed
I installed a new Bosch alternator with the clutched pully and they appeard to be identical, except for the pully.
Leading evidence: 'Install bosch alternator' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install bosch alternator' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed
I have a brand new one that I installed on my alternator.
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Performed · outcome unconfirmed · Original poster
My understanding is that the design was changed in response to reports of belts being thrown off and/or high belt wear during rapid changes in engine rpm and the free wheel lock allows the alternator to spin independently of engine rpm during these events.
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Suggestion · Original poster
Since the alternator itself is fine I just want to replace the pulley.
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Suggestion
You will need something like one of these to tighten the sprag clutch equipped pulley.
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Performed · outcome unconfirmed · Original poster
My understanding is that the design was changed in response to reports of belts being thrown off and/or high belt wear during rapid changes in engine rpm and the free wheel lock allows the alternator to spin independently of engine rpm during these events.
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Rennlist: 1 discussions
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Generation: 20261026T052503Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
My �99 996 has a damaged alternator pulley. It is an early design alternator with a conventional solid one piece pulley, non free wheel locking. Since the alternator itself is fine I just want to replace the pulley. All I see offered for sale are the free wheel lock type as installed in later cars. Is it possible to put this newer style pulley on my existing alternator? My understanding is that the design was changed in response to reports of belts being thrown off and/or high belt wear during rapid changes in engine rpm and the free wheel lock allows the alternator to spin independently of engine rpm during these events.
Should be fine as long as the shaft is the same.
You will need something like one of these to tighten the sprag clutch equipped pulley.
https://www.amazon.com/EWK-V-Belt-Pulley-Removal-Alternator/dp/B00I9Q3B8U/ref=sr_1_5?ie=UTF8&qid=1526598164&sr=8-5&keywords=alternator+pulley+removal+tool&dpID=41h6j4MH1eL&preST=_SY300_QL70_&dpSrc=srch
https://www.amazon.com/EWK-V-Belt-Pulley-Removal-Alternator/dp/B00I9Q3B8U/ref=sr_1_5?ie=UTF8&qid=1526598164&sr=8-5&keywords=alternator+pulley+removal+tool&dpID=41h6j4MH1eL&preST=_SY300_QL70_&dpSrc=srch
https://www.amazon.com/ABN-Alternator-Service-Decoupler-18-Piece/dp/B079P5465S/ref=sr_1_4?ie=UTF8&qid=1526598164&sr=8-4&keywords=alternator+pulley+removal+tool&dpID=41dWwf5ujlL&preST=_SY300_QL70_&dpSrc=srch
https://www.amazon.com/ABN-Alternator-Service-Decoupler-18-Piece/dp/B079P5465S/ref=sr_1_4?ie=UTF8&qid=1526598164&sr=8-4&keywords=alternator+pulley+removal+tool&dpID=41dWwf5ujlL&preST=_SY300_QL70_&dpSrc=srch
I have a brand new one that I installed on my alternator. The old one seized. Turned the car on and found noise in the alternator too. I bought a new alternator. Can sell you the pulley if you want it although my friend with the special wrench for the pulley moved to Cali... I have to find a way to get it off first.
The previous owner gave me the original alternator for my March 1998 build 996 and it had the solid aluminum pully. I installed a new Bosch alternator with the clutched pully and they appeard to be identical, except for the pully. I can't say they were identical with 100% certainty because the shaft is covered by the clutched pully.
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