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924RACR
Joined: 29 Jul 2001
Posts: 9050
Location: Royal Oak, MI, USA
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 Posted: Thu Apr 02, 2026 5:05 am Post subject: 931 alternator bushings once again available! |
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Thank you Porsche Classic! 931 603 119 01 is the rubber bushing for the pivot mounting point on the 931 alternator, used to be NLA, two required, looks like it is once again available from the dealer!!
Have ordered up a pair, Silver Spring Porsche had a great price at $23 each... I think that's who I got my dash from...
Slowly but surely these cars are once again starting to be able to be restored, instead of just held together with baling wire, duct tape and prayers... 
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Vaughan Scott
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'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype |
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chuck21401
Joined: 20 Feb 2005
Posts: 606
Location: Annapolis, MD
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| Posted: Thu Apr 02, 2026 9:45 am Post subject: Re: 931 alternator bushings once again available! |
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| 924RACR wrote: | Thank you Porsche Classic! 931 603 119 01 is the rubber bushing for the pivot mounting point on the 931 alternator, used to be NLA, two required, looks like it is once again available from the dealer!!
Have ordered up a pair, Silver Spring Porsche had a great price at $23 each... I think that's who I got my dash from...
Slowly but surely these cars are once again starting to be able to be restored, instead of just held together with baling wire, duct tape and prayers... |
So how does one know when those bushings are going bad?
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1981 Porsche 931 w/S1 engine & euro g31 transaxle. Water-cooled intercooler |
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Mclaren924
Joined: 13 Oct 2021
Posts: 255
Location: Oceanside CA
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| Posted: Thu Apr 02, 2026 10:51 am Post subject: |
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when your alternator pulley starts trying to make love to the back of your airbox when running
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1980 931 "Salt" Bucket wannabe racer (Dreaming)
1979 924 Sebring "Pepper" -Sold
1977 924 Slicktop "Pennie"-Most likely parts
1979 3/5 gt clone 924- Shop Test Car |
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Cedric
Joined: 27 Aug 2004
Posts: 2794
Location: Sweden
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| Posted: Thu Apr 02, 2026 2:55 pm Post subject: |
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I hope they are better than they used to be, my new ones didnt last that long. Nowdays i run a 3d printed version instead 
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1980 924 Turbo
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924RACR
Joined: 29 Jul 2001
Posts: 9050
Location: Royal Oak, MI, USA
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| Posted: Thu Apr 02, 2026 8:39 pm Post subject: |
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| Cedric wrote: | | I hope they are better than they used to be, my new ones didnt last that long. Nowdays i run a 3d printed version instead |
Have you shared that file to the Porsche Printed Parts database? I'd have made those already if it were an option... mine is loose on the mountings, I used a slip of rubber hose to fill the gap but of course that didn't last either, so it's loose on the mountings...
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Vaughan Scott
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'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype |
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Fifty50Plus
Joined: 28 Feb 2008
Posts: 1421
Location: Washington DC area
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| Posted: Fri Apr 03, 2026 4:31 am Post subject: |
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I don't know if the 931 and NA 924 bushings are the same but the NA ones don't last long. On my race car I've made some metal ones on my lathe to keep the alternator pulley in line with the crank and water pump pulleys. PITA.
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1979 924 NA race car H-Prod SCCA
1982 924 NA race car - Sold
1981 924 Turbo sold
1982 924 Turbo sold
1972 911 E race car - traded for Cayenne Diesel
1975 914 1.8 Building for H-Prod SCCA |
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924RACR
Joined: 29 Jul 2001
Posts: 9050
Location: Royal Oak, MI, USA
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| Posted: Fri Apr 03, 2026 9:16 pm Post subject: |
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They aren't the same, not at all... but I also have steel bushings for the alternator on the racecar, so yeah!!
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Vaughan Scott
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'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype |
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Cedric
Joined: 27 Aug 2004
Posts: 2794
Location: Sweden
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| Posted: Sun Apr 05, 2026 5:47 pm Post subject: |
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| Fifty50Plus wrote: | | I don't know if the 931 and NA 924 bushings are the same but the NA ones don't last long. On my race car I've made some metal ones on my lathe to keep the alternator pulley in line with the crank and water pump pulleys. PITA. |
Might have been made by the same black cheese material, back in the days i bought new ones from Porsche for my NA aswell, they also went shite quite quickly, causing sloppy belt and pulley misalignment, i think the complete alternator mounting is worse on the na though. If i still had one i would make something different:)
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1980 924 Turbo
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chuck21401
Joined: 20 Feb 2005
Posts: 606
Location: Annapolis, MD
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| Posted: Mon Apr 06, 2026 12:18 am Post subject: Re: 931 alternator bushings once again available! |
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| chuck21401 wrote: | | So how does one know when those bushings are going bad? |
| Mclaren924 wrote: | | when your alternator pulley starts trying to make love to the back of your airbox when running |
I bet that would make some noise. Luckily that hasn't happened yet.
The rear bushing is looking squished. But maybe that's just the way it looks because there are two bushings there?
Hard to tell what's going on with the front bushing.
Probably something cheap to replace before it becomes a problem? Easy enough to get to.
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1981 Porsche 931 w/S1 engine & euro g31 transaxle. Water-cooled intercooler
Last edited by chuck21401 on Mon Apr 06, 2026 12:53 am; edited 3 times in total |
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chuck21401
Joined: 20 Feb 2005
Posts: 606
Location: Annapolis, MD
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| Posted: Mon Apr 06, 2026 12:43 am Post subject: |
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Looking at the parts diagram...at the pivot point....the front bushing is #12 93160311700 and the rear has two bushings #19 93160311901.
Then there's another #12 bushing on the alternator adjusting bracket.
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1981 Porsche 931 w/S1 engine & euro g31 transaxle. Water-cooled intercooler |
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924RACR
Joined: 29 Jul 2001
Posts: 9050
Location: Royal Oak, MI, USA
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| Posted: Mon Apr 06, 2026 3:57 am Post subject: |
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Oh damn, missed the front one... and that's even more, $35 at the dealer!
OK well next time... will see how the new rear ones work for me first, I think, as those were really destroyed, the fronts not as bad... and maybe I decide that printed is a better way forward from here... if we can find files, or make some up?
Evidently I need to be sure to take measurements of the new parts before I install and wear them out!!
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype |
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