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Location: Ontario, Canada
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Need 928 102 139 12 crank pulley

Hi everyone!

Anybody have a new/good used crank pulley they want to part with!?

Thanks! Mat

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'70 911T - my first - SOLD
'83 928S - fast becoming the daily driver - SOLD
'03 Ford Explorer Eddie Bauer - wife
'03 Cadillac CTS - daily
1990 928 S4
Old 07-27-2020, 09:11 AM
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928 Intl lists used for $150- U928 102 139 11. Pretty sure that's the same as the -12 pulley.
Old 07-31-2020, 06:19 PM
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I actually might have one. Let me check tomorrow.
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John Curry (Drift King) 928OC member
Grand Prix White 1994 GTS AT (The GTS)
Black 1989 GT (The GT) and Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson) and Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 07-31-2020, 08:09 PM
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Thanks for the responses.

'stepson'...I will wait to see if you do have one before moving forward.

Mat
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'70 911T - my first - SOLD
'83 928S - fast becoming the daily driver - SOLD
'03 Ford Explorer Eddie Bauer - wife
'03 Cadillac CTS - daily
1990 928 S4
Old 08-02-2020, 02:27 PM
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Sorry I wasn't able to get by the storage this weekend. I will try to go by there tomorrow or Tuesday. Pretty sure I have one though. I'll let you know.
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John Curry (Drift King) 928OC member
Grand Prix White 1994 GTS AT (The GTS)
Black 1989 GT (The GT) and Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson) and Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 08-02-2020, 08:50 PM
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The part number for the one I have is 928 102 139 03. It does have the flat alternator belt pulley
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John Curry (Drift King) 928OC member
Grand Prix White 1994 GTS AT (The GTS)
Black 1989 GT (The GT) and Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson) and Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 08-03-2020, 03:27 PM
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So forgive my ignorance...I think that pulley is technically for '83/'84'ish?

Will this work on my '90 S4? What is the difference between 928 102 139 - 11, 12, & 03 which is the one you have?

Car is currently at shop doing T Belt with Porken tensioner from Roger at 928srus.

The pulley is really worn as it appears to have been put back on incorrectly at some point in the past.

Thanks!

Mathew
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'70 911T - my first - SOLD
'83 928S - fast becoming the daily driver - SOLD
'03 Ford Explorer Eddie Bauer - wife
'03 Cadillac CTS - daily
1990 928 S4
Old 08-04-2020, 06:46 AM
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Quote:
Originally Posted by Mat 71 View Post
So forgive my ignorance...I think that pulley is technically for '83/'84'ish?

Will this work on my '90 S4? What is the difference between 928 102 139 - 11, 12, & 03 which is the one you have?

Car is currently at shop doing T Belt with Porken tensioner from Roger at 928srus.

The pulley is really worn as it appears to have been put back on incorrectly at some point in the past.

Thanks!

Mathew
Yes this pulley came from an 83. I actually didn't remember that they changed from a V belt for the alternator in 83. I had thought it was 1984. I don't know if this pulley will work for your application, but if the crank is the same diameter, I would think it would work. I just don't know for sure. maybe somebody else will chime in, but I don't know any reason why it wouldn't work.
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John Curry (Drift King) 928OC member
Grand Prix White 1994 GTS AT (The GTS)
Black 1989 GT (The GT) and Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson) and Black Metallic 1984 Euro S 5 speed (The Schwartz)

Last edited by stepson; 08-04-2020 at 10:16 PM..
Old 08-04-2020, 10:12 AM
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So I was just looking at 928srus and they have the pulley listed as '83 to '91 bearing 928 102 139 11, so now I am not so sure that your pulley won't work.

I will get a pic, and comment from the shop tomorrow and see what is said about the pulley coming off of my car. Maybe this one will work that you have, and Porsche just changed the numbers as the years went on, but the pulley is the same.

I will comment tomorrow when I search out further details...

Thanks,

Mat
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'70 911T - my first - SOLD
'83 928S - fast becoming the daily driver - SOLD
'03 Ford Explorer Eddie Bauer - wife
'03 Cadillac CTS - daily
1990 928 S4
Old 08-05-2020, 04:03 PM
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Nope, not interchangeable by looking at picture comparison.

The one coming off of my car has more grooves on the large diameter pulley.

Thanks for sending me what you had!

Mat
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'70 911T - my first - SOLD
'83 928S - fast becoming the daily driver - SOLD
'03 Ford Explorer Eddie Bauer - wife
'03 Cadillac CTS - daily
1990 928 S4
Old 08-06-2020, 06:35 AM
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Well Darn. Sorry I couldn't help.

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John Curry (Drift King) 928OC member
Grand Prix White 1994 GTS AT (The GTS)
Black 1989 GT (The GT) and Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson) and Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 08-06-2020, 06:58 AM
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