 should I or shouldn't I?, flexible sealant on pushrod tube seals? |
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| iankarr |
 Jan 12 2017, 09:26 PM
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The wrencher formerly known as Cuddy_K  Group: Members Posts: 2,519 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region 
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Hi Guys,
I have new pushrod tubes and viton o-rings ready to install as my quest to keep kitty litter out of my garage continues... The bores are super clean and look like they'd make a good seal...but when I serviced the tubes last year, they did leak a bit. That was using new viton, but the old tubes. The new tubes definitely seem to "seat" the rubber better. What are your thoughts about using yamabond (or some other flexible sealant)? Is there any downside? I assume it would only go around the seals on the case side, right? Thanks! |
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| Mark Henry |
Jan 20 2017, 05:05 PM
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
NO to any sealant!
BTW Yamabond (threebond) although a different curing type is still RTV based. It's excellent stuff, but this is the wrong app. I have used liquid teflon, for the most part it worked but I didn't like it. I now use DOW 55 which is made specifically for O-rings. The DOW 55 is a lube (Molykote), but it also makes the O-ring swell a bit, giving it a tighter seal. Two big tricks when installing the tubes. 1/ Smooth out and deburr the radius and hole on both the heads and case holes to make sure there are no sharp edges to cut the O-ring. 2/ As you insert the tube do so with a slight spinning action on the tube. |
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Posts in this topic
cuddyk should I or shouldn't I? Jan 12 2017, 09:26 PM
mark04usa IMHO, push rod tube seals should be installed with... Jan 13 2017, 12:13 AM cuddyk Thanks mark.
My preference would be to go with no... Jan 13 2017, 12:45 AM johnhora As Mark said oil only ....no sealant...
many VW an... Jan 13 2017, 10:57 AM Keith914 Hmmm! I just finished carefully, no O ring dam... Jan 20 2017, 03:21 PM
HAM Inc I only used oil. I've fixed drips from newly i... Jan 20 2017, 07:32 PM Keith914 Thanks sgain for your advice -- will try spinning ... Jan 20 2017, 10:33 PM Keith914 Rotated the tubes 180 degrees (surprisingly easy -... Jan 22 2017, 12:49 PM |
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