I am installing an intake nipple in my 1931 VL cylinder. I have read many posts on this and other is forums about the procedures and possible sealers. I know almost nothing stands up to gas. Has anyone actually used "Alvins High Temp Metal Lab" as a thread sealer between nipple and cylinder threads? If so, what were results, especially long term? I have an area of weak threads and have tried JB Weld but still had air leak at threads during pressure test. Thanks.
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Originally posted by Buster View PostI am installing an intake nipple in my 1931 VL cylinder. I have read many posts on this and other is forums about the procedures and possible sealers. I know almost nothing stands up to gas. Has anyone actually used "Alvins High Temp Metal Lab" as a thread sealer between nipple and cylinder threads? If so, what were results, especially long term? I have an area of weak threads and have tried JB Weld but still had air leak at threads during pressure test. Thanks.Steve Swan
27JD 11090 Restored
https://www.youtube.com/watch?v=ClUPIOo7-o8
https://www.youtube.com/watch?v=LtuptEAlU30
27JD 13514 aka "Frank"
https://forum.antiquemotorcycle.org/...n-Project-SWAN
https://www.youtube.com/watch?v=hNRB...nnel=steveswan
https://www.youtube.com/watch?v=RSDeuTqD9Ks
https://www.youtube.com/watch?v=bwlIsZKmsTY
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Originally posted by Buster View PostI know someone who successfully uses X Pando to seal flathead exhaust pipe sat cylinder spigots, but dont know how it stands up to gas.Steve Swan
27JD 11090 Restored
https://www.youtube.com/watch?v=ClUPIOo7-o8
https://www.youtube.com/watch?v=LtuptEAlU30
27JD 13514 aka "Frank"
https://forum.antiquemotorcycle.org/...n-Project-SWAN
https://www.youtube.com/watch?v=hNRB...nnel=steveswan
https://www.youtube.com/watch?v=RSDeuTqD9Ks
https://www.youtube.com/watch?v=bwlIsZKmsTY
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The Alvin's site says it is not affected by gas and withstands 1,000 degrees. I know someone that used it on a knucklehead nipple replacement 2 years ago and it is holding up. It's expensive, but nowhere near as expensive as the piston I burned a hole though on my 45" flathead this fall due to a nipple leak. Steve, it will be Interesting to see what the Alvin's rep says. I now have a can of it and will be doing the nipple in about a week.
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Originally posted by Buster View PostThe Alvin's site says it is not affected by gas and withstands 1,000 degrees. I know someone that used it on a knucklehead nipple replacement 2 years ago and it is holding up. It's expensive, but nowhere near as expensive as the piston I burned a hole though on my 45" flathead this fall due to a nipple leak. Steve, it will be Interesting to see what the Alvin's rep says. I now have a can of it and will be doing the nipple in about a week.Steve Swan
27JD 11090 Restored
https://www.youtube.com/watch?v=ClUPIOo7-o8
https://www.youtube.com/watch?v=LtuptEAlU30
27JD 13514 aka "Frank"
https://forum.antiquemotorcycle.org/...n-Project-SWAN
https://www.youtube.com/watch?v=hNRB...nnel=steveswan
https://www.youtube.com/watch?v=RSDeuTqD9Ks
https://www.youtube.com/watch?v=bwlIsZKmsTY
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I dont know if it can be taken apart, that is a concern with me . It will be about a week before I can use it and I am going to put some on a separate nut and bolt and let it cure. I will see if it is an adhesive. I will report back, but it will be a week or so.
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For what it's worth, I've used Loctite 565 high temperature thread sealant for a very long time now with great success. I always give it 24 hour cure time and follow the "Do it right" user guide put out by Loctite. It's rated at 10,000 psi after 24 hours cure time and is serviceable. I've had great success and won't use anything but.
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I hate threads where you never find out what happened, so reporting back. Installed nipple with Alvins and had no leak at threads but leaked at one spot at rivet hole. Looking back, I wish I had left in and sealed outside of rivet with JB Weld. But I took it back out and no problem screwing out after using Alvins on threads. Got a new nipple and inserted with Gasoila E Seal. Sealed good at threads but leaked at rivet hole area. Cleaned Gasoila out of area around rivet hole and sealed leaking rivet hole area with JB Weld. I found the Gasoila but works between threads and has to be backed or contained by the threads since it is soft setting. The JB Weld worked great at the rivet area toward the outside area. No leak now. So Gasoila E Seal between threads and JB Weld at outer area. Need to run through several heat cycles and watch.
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Originally posted by T. Cotten View PostDoes anyone have evidence that the MOCO used any sealer, Folks?
Thanks in advance,....
If the MOCO didn't use a sealer?
Thanks again in advance,
....Cotten
AMCA #776
Dumpster Diver's Motto: Seek,... and Ye Shall Find!
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Originally posted by Steve Swan View Post
i just left a contact information request with Alvins to ask if their product holds up to direct exposure to gasoline. Will post when i receive a reply.Steve Swan
27JD 11090 Restored
https://www.youtube.com/watch?v=ClUPIOo7-o8
https://www.youtube.com/watch?v=LtuptEAlU30
27JD 13514 aka "Frank"
https://forum.antiquemotorcycle.org/...n-Project-SWAN
https://www.youtube.com/watch?v=hNRB...nnel=steveswan
https://www.youtube.com/watch?v=RSDeuTqD9Ks
https://www.youtube.com/watch?v=bwlIsZKmsTY
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Originally posted by T. Cotten View Post
What are the implications, Folks,...
If the MOCO didn't use a sealer?
Thanks again in advance,
....CottenSteve Swan
27JD 11090 Restored
https://www.youtube.com/watch?v=ClUPIOo7-o8
https://www.youtube.com/watch?v=LtuptEAlU30
27JD 13514 aka "Frank"
https://forum.antiquemotorcycle.org/...n-Project-SWAN
https://www.youtube.com/watch?v=hNRB...nnel=steveswan
https://www.youtube.com/watch?v=RSDeuTqD9Ks
https://www.youtube.com/watch?v=bwlIsZKmsTY
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I always chose the suspenders-and-a-belt approach with nipples of course, Steve!
But why didn't the MOCO?
The original assembly appears to have achieved a mechanical seal, upon hundreds and hundreds of thousands+ of machines, for about seven decades. If we are to consider goobers and band-aids because we cannot reproduce the assembly, then we aught to test all of the goobers immersed in today's fuels before an endorsement. P4gas can be alien spit. And it changes constantly.
If a mechanical seal is ideal, then the reported success of any added goober might just mean a mechanical seal was achieved in the first place.
....Cotten
PS: Just for aggravation, I have evidence that Indian used a sealer!Last edited by T. Cotten; 02-04-2024, 07:00 AM.AMCA #776
Dumpster Diver's Motto: Seek,... and Ye Shall Find!
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