I spy a little hole
- Thread starter DrywallDoc
- Start date
Wow, that is leaking air? Are you sure? It would have leaked since new.
Looks like a porosity flaw, a bubble in the cast aluminum.
I do thing the JBWeld could fix this up if carefully applied.
Looks like a porosity flaw, a bubble in the cast aluminum.
I do thing the JBWeld could fix this up if carefully applied.
I haven't cranked it yet to see what it acts like. I just finished rebuilding the top end last night. Went to leak test this morning and it wouldn't hold any pressure whatsoever. Then I found the hole and when I plug it with my finger it passes the leak test. I found a tiny needle-like peice of metal and covered it with jbweld. Then I put the peice in the hole and dabbed more jb weld all around and in, as best I could. Hopefully this will fix it. If this doesn't do, what are my other options?
Sounds like you pretty much have it covered.
I'm guessing you cleaned it up with some acetone or carb cleaner first?
Drilling it and epoxying (JBWeld) and/or peening in a close fitting piece aluminum rod made sense too.
Ever seen a pinned and peened casting crack repair?
An overlapping and interlocked set of pin along a crack to repair it.
It used to even be done to headsurfaces before they were machined. Scary but worked with thicker castings.
This is the closest article I could find on the web to it.
https://streettechmag.com/2015/03/23/block-repair/
I learned it a bit differently.
We used mild steel or soft aluminum rod, used a drill the same size as the rod.
We drilled blind holes at the ends and along the crack in a alternating diagonal pattern.
Old school but it worked.
I'm guessing you cleaned it up with some acetone or carb cleaner first?
Drilling it and epoxying (JBWeld) and/or peening in a close fitting piece aluminum rod made sense too.
Ever seen a pinned and peened casting crack repair?
An overlapping and interlocked set of pin along a crack to repair it.
It used to even be done to headsurfaces before they were machined. Scary but worked with thicker castings.
This is the closest article I could find on the web to it.
https://streettechmag.com/2015/03/23/block-repair/
I learned it a bit differently.
We used mild steel or soft aluminum rod, used a drill the same size as the rod.
We drilled blind holes at the ends and along the crack in a alternating diagonal pattern.
Old school but it worked.
Just finished heat cycling and so far it's holding up. If it was to fail what do you think the symptoms would be with and airleak that big
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