 Are all Viton 0=ring versions equal for the push rod tubes ? |
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| GBX0073 |
 Jul 16 2023, 01:18 PM
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#1
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Member  Group: Members Posts: 164 Joined: 21-December 20 From: Illinois Member No.: 25,007 Region Association: Upper MidWest 
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Looking for Suggestions
I have the Green Viton O-rings from the AA-performance Gasket kit And I also have the Viton Seal Kit (non-Green) from 914 Rubber Which set should I use? Plan is to use Sil-Glyde Brake lube for Assembling Would go with the Dow 55 but don’t want to wait another 2 weeks for shipping. trying not to misstep but also want/ need to just move forward (IMG:style_emoticons/default/smile.gif) |
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| r_towle |
Jul 16 2023, 01:23 PM
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#2
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Custom Member Group: Members Posts: 24,585 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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My personal preference is to use whichever o-ring fits snug.
I remember having to buy two sets to get inner and outer to fit properly. |
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| nditiz1 |
Jul 16 2023, 02:44 PM
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#3
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Senior Member Group: Members Posts: 1,190 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region
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The inner is 21.3mm (black) the outer is 25.1 (Green) from the PET catalog
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| 914sgofast2 |
Jul 16 2023, 06:41 PM
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#4
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Senior Member Group: Members Posts: 622 Joined: 10-May 13 From: El Dorado Hills, CA Member No.: 15,855 Region Association: None |
QUOTE(nditiz1 @ Jul 16 2023, 01:44 PM)  The inner is 21.3mm (black) the outer is 25.1 (Green) from the PET catalog Agree. Earlier engines used small and large o-rings on the tubes. The smaller size was on the end of the tube in the cylinder head, and the larger size was used on the end of the tube that fits into the engine case. Later 2 liter engines used the same size o-rings on each end of the tube, and they were the larger sized ones. At least in my experience that's how it worked on early 1.7 engines and later 2.0 engines. |
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| wonkipop |
Jul 16 2023, 07:12 PM
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#5
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Advanced Member Group: Members Posts: 4,372 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille
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works this way from memory (did them about 4 years ago, think i have this right).
all the engines have the same black o ring at block end. 21mm all the early 1.7s (pre EA/EB) use the red ones at the head end. 23mm all the later 1.7s, (EA/EB), the 1.8 and the 2.0 use the green at the head end. 25mm i'm doing those sizes off my memory. the actual sizes should be in the PET maybe. but basically thats how it works. red for early, green for later. black on all at the block. pretty sure that is right, but you never know with the mysteries of the 914. (IMG:style_emoticons/default/biggrin.gif) |
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| wonkipop |
Jul 16 2023, 07:17 PM
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#6
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Advanced Member Group: Members Posts: 4,372 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille
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ps
i have a couple of old seal kits that i have had for 30 years. one of those was what i used 4 years ago. it was a universal kit had all the different o rings in it. red, green and black. must have been the way they were sold back last century? was how i figured out which o-ring to put on where. i'm guessing the kits are no longer around so you got to know the sizes. it must be listed in PET? |
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