Jb epoxy… will it hold up? Jonny 2165

[Gullet]

Looks good!
I've used a socket with sandpaper as you mentioned earlier & had good results.

 

[Stump Shot]

View attachment 351577 View attachment 351578 View attachment 351579 View attachment 351580 View attachment 351581 Well I cleaned up the seal seat. Put a seal in and it didn’t heave at all. Looks pretty good actually. I was very meticulous when it came to cleaning the seat and chamfering the entrance. Idk. I think it should be tested for testing purposes.

 

[Mastermind]

View attachment 351577 View attachment 351578 View attachment 351579 View attachment 351580 View attachment 351581 Well I cleaned up the seal seat. Put a seal in and it didn’t heave at all. Looks pretty good actually. I was very meticulous when it came to cleaning the seat and chamfering the entrance. Idk. I think it should be tested for testing purposes.

Looks damn good.

 

[sledneck22]

Bottom end is together and the epoxy held up to heat when slapping the crank in.
Tried my hand at some porting. I’m no expert but should be fine for my own use and/or dad to use. Raised the exhaust a couple thou. Roughed up the intake and added a a bit of duration and opened the transfer way up. When I get more time in the shop and the top end on, we’ll find out if it holds pressure/vac.

 

[sledneck22]

Well it’s finally together. Been a couple hectic months and unable to get into the shop. Back together. Holds vac and pressure. Pulled it over until it popped tonight and it’ll wait until tomorrow and we’ll see what it can do. Sure do like the looks of a 2165/2171.

 

[woodfarmer]

Nice looking saw, i have a half dozen of them stock and ported.

 

[bulletpruf]

Nice work on the repair.

Lately I've tried AlumBond - similar to JB Weld, but made especially for aluminum. Not sure how that translates to magnesium or alum/mag alloy, but has worked fine for me so far.

 

[lehman live edge slab]

Wonder if permtex sleeve retainer would have worked on that seal pocket of if it was too large a gap.

 

[sledneck22]

Update. I ran 7-8 tanks through the saw and all was well. Until it suddenly went way lean. Figured my seal fix went kaput. Today I finally got around to pressure testing it.
Here’s the video.

Leaking the opposite side of the fix.

 

[Mastermind]

Update. I ran 7-8 tanks through the saw and all was well. Until it suddenly went way lean. Figured my seal fix went kaput. Today I finally got around to pressure testing it.
Here’s the video.

Leaking the opposite side of the fix.

Using epoxy to prevent an air leak is never a good idea.

 

[sledneck22]

Using epoxy to prevent an air leak is never a good idea.

But what’s funny is it’s the opposite side as the epoxy. The side with the repair isn’t leaking at all. Is it a bad seal? Is it ever so slightly out of round that it pancaked the top side. Is the seal pinched funny when pressing in?
I feel like further investigation is required and hoped for some ideas.
Also the leak is slow. Barely nicking a psi every few seconds. Can anyone elaborate how much of a leak is needed to obviously know a running saw is leaning out. I saw this because I’m thinking there’s something else going on here.

 

[huskihl]

But what’s funny is it’s the opposite side as the epoxy. The side with the repair isn’t leaking at all. Is it a bad seal? Is it ever so slightly out of round that it pancaked the top side. Is the seal pinched funny when pressing in?
I feel like further investigation is required and hoped for some ideas.
Also the leak is slow. Barely nicking a psi every few seconds. Can anyone elaborate how much of a leak is needed to obviously know a running saw is leaning out. I saw this because I’m thinking there’s something else going on here.

If I can see the needle move looking at it for 5 seconds, I try and fix it. In my experience, leaks that cause running issues are noticeable on the needle. They usually only pump up to less than 5 psi and will fall off quickly to under 2 psi within a few seconds.

I would put yours under vacuum and let it suck some Motoseal or Loctite into it. And then let the pressure off and let it sit for a couple days

 

[sledneck22]

So I added some motoseal to the opposite side of the jb epoxy fix. Pulled vacuum for 5 minutes or so then just pumped it every 5 minutes or so. After an hour I can back and checked it and it was holding vacuum.
Tomorrow I’ll clean up the excess motoseal and throw some pressure at it and see how she holds.

 

[huskihl]

So I added some motoseal to the opposite side of the jb epoxy fix. Pulled vacuum for 5 minutes or so then just pumped it every 5 minutes or so. After an hour I can back and checked it and it was holding vacuum.
Tomorrow I’ll clean up the excess motoseal and throw some pressure at it and see how she holds.

I fixed an 066 for @jacob j. like that. I don’t see any reason it won’t last

 

[Stump Shot]

I fixed an 066 for @jacob j. like that. I don’t see any reason it won’t last

I seem to recall using 1159 sealant upon installing a seal on a firewood saw years ago that had a defect in the case and it did the trick, still chugging along a decade later.

 

[isaaccarlson]

Should be fine now. My 350 was leaking like a sieve after 3 rebuilds. I couldn't get it sealed up. Finally just bought another case and that fixed it. Must have been warped just right so it would leak even when slobbered in sealer.

Don't worry about the jb weld. It'll be there for a LONG time. I use it in my lower transfers to increase flow. It works wonders.