 Speedometer drive seal dimensions. Does anyone have one out and can put a caliper to the seal? |
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| 914xr75 |
 Dec 31 2020, 03:11 PM
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Member  Group: Members Posts: 174 Joined: 24-March 18 From: Whittier, CA Member No.: 21,996 Region Association: Southern California  |
On autoatlanta.com site they have a part number that is 2,4-25,3. I'm thinking this is the width and the inside diameter. If anyone has one out and can confirm this for me that would be awesome. I can purchase this o-ring locally for a couple dollars. Auto Atlanta's $1 seal we'll come up to about $16 with shipping.
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| 914sgofast2 |
Dec 31 2020, 04:08 PM
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#2
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Senior Member Group: Members Posts: 617 Joined: 10-May 13 From: El Dorado Hills, CA Member No.: 15,855 Region Association: None |
Try 914Rubber.com
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| rgalla9146 |
Dec 31 2020, 05:03 PM
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#3
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Advanced Member Group: Members Posts: 4,555 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None 
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don't forget 914 318 261 00 sealing ring ..... that's the tiny radial seal
which is often overlooked.... change it. the O ring is 999 701 064 50 ........ 25,3-2,4 That means 25.3 mm diameter and 2.4 mm cross section |
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| IronHillRestorations |
Jan 2 2021, 09:18 AM
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#4
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I. I. R. C. Group: Members Posts: 6,719 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None
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There's three seals for the speedo drive. The small radial seal that Rory mentions, for the drive shaft, an aluminum seal ring that goes in before the drive in the pics, and then the O ring. I just replaced all three on a customer's car. There are modified drives sold (914 Rubber I think) that have an extra O ring
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| bdstone914 |
Jan 2 2021, 11:12 PM
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#5
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bdstone914 Group: Members Posts: 4,522 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(914xr75 @ Dec 31 2020, 03:11 PM)  On autoatlanta.com site they have a part number that is 2,4-25,3. I'm thinking this is the width and the inside diameter. If anyone has one out and can confirm this for me that would be awesome. I can purchase this o-ring locally for a couple dollars. Auto Atlanta's $1 seal we'll come up to about $16 with shipping. just buy it from your local Porsche dealer. |
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| bdstone914 |
Jan 2 2021, 11:41 PM
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#6
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bdstone914 Group: Members Posts: 4,522 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(IronHillRestorations @ Jan 2 2021, 09:18 AM) There's three seals for the speedo drive. The small radial seal that Rory mentions, for the drive shaft, an aluminum seal ring that goes in before the drive in the pics, and then the O ring. I just replaced all three on a customer's car. There are modified drives sold (914 Rubber I think) that have an extra O ring And that aluminium washer is $10. I cant find a commercial one of that size. |
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