 Case through bolt o-ring size, Case through bolt o-ring size |
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| dknechtly |
 Nov 19 2025, 10:10 AM
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#1
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Yellow 914  Group: Members Posts: 70 Joined: 11-April 03 From: Wylie, TX Member No.: 560 Region Association: None  |
Does anyone know the case through bolt o-ring size? I split my case and want to use viton. I've searched but had no luck. Thanks
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| 914sgofast2 |
Nov 19 2025, 01:07 PM
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#2
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Senior Member Group: Members Posts: 781 Joined: 10-May 13 From: El Dorado Hills, CA Member No.: 15,855 Region Association: None |
No orings are used on Type 4 engine case through bolts.
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| dknechtly |
Nov 20 2025, 07:57 AM
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#3
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Yellow 914 Group: Members Posts: 70 Joined: 11-April 03 From: Wylie, TX Member No.: 560 Region Association: None |
Thanks for the reply. These go in between the case halves. The right half inside holes are beveled. I did finally find that they are 8mm ID X 12mm OD X 2mm.
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| Superhawk996 |
Nov 20 2025, 08:27 AM
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#4
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914 Guru Group: Members Posts: 7,526 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch 
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QUOTE(914sgofast2 @ Nov 19 2025, 03:07 PM)  No orings are used on Type 4 engine case through bolts. (IMG:style_emoticons/default/agree.gif) There is a vibration damper that belongs on the through bolts between case halves. |
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| VaccaRabite |
Nov 20 2025, 12:37 PM
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#5
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En Garde! Group: Admin Posts: 13,811 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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Third voice saying there are no o-rings there. Its a hard plastic ribbed damper about an inch long. not an o-ring.
Zach |
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