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08-19-2020, 10:40 PM | #21 |
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Join Date: Jan 2014
Location: Orcas Island Washington
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Re: I found a crack in an odd place while pressure testing
Fordestes, I love that kind of solution. Mechanical but with the twist of the suction I really understand that it would work. I have seen way too many jb weld and marine tex repairs that didn't hold up due to poor prep work. If your vacuum could pull a blob into and just past the crack it would be a great repair for pressure pushing out. Gonna find me some belzona 1111!
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Owner/Operator of 'Jailbar Ranch' on the side of Mt. Pickett. Current stable consists of 1946 1/2 ton pickup turned woodie wagon with FH V8, 1947 Tonner Pickup (red) mostly stock with exception of a cummins 6at turbo diesel, 1946 Tonner Pickup (green) with 226 cu in 6 cyl flathead, 1979 Toyota landcruiser wagon, completely encased in 1947 Ford Jailbar sheet metal. Ok, cornbinder rear fenders..... 'Rusty ol' floorboards, hot on their feet' (Alan Jackson) |
08-20-2020, 01:38 AM | #22 |
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Location: Lancaster PA
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Re: I found a crack in an odd place while pressure testing
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08-20-2020, 01:40 AM | #23 |
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Join Date: Nov 2010
Location: Lancaster PA
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Re: I found a crack in an odd place while pressure testing
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08-20-2020, 05:43 AM | #24 | |
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Join Date: May 2010
Location: NJ
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Re: I found a crack in an odd place while pressure testing
Quote:
My advise would be to call Belzona. They have local field reps that work your area. In the mean time, send me a message. I have an offer for you. |
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08-20-2020, 06:10 AM | #25 |
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Join Date: Sep 2014
Location: Wiscasset, Maine
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Re: I found a crack in an odd place while pressure testing
I'm a fan of JB Weld but have also used Blue Magic Extreme. Both have very high temperature products. I used the Blue Magic QuikSteel Extreme on pin holes in an exhaust header a couple of years ago and the repair is still fine.
We used Belzona in the power plants I've worked on. It makes sound permanent repairs. https://www.oreillyauto.com/detail/b.../37901/4388157 https://www.quiksteel.com/brands/QuikSteel.html Get the surface very clean. I would use acetone for the final cleaning. |
08-20-2020, 09:52 AM | #26 |
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Re: I found a crack in an odd place while pressure testing
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Last edited by Fordestes; 08-20-2020 at 10:08 AM. |
08-20-2020, 10:15 AM | #27 |
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Join Date: Sep 2014
Location: Wiscasset, Maine
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Re: I found a crack in an odd place while pressure testing
Yes good point on not using the J-B Weld Kwik version. It has poorer properties than the "regular"
From https://www.jbweld.com/product/j-b-weld-twin-tube "J-B Weld™ is The Original Cold Weld two-part epoxy system that provides strong, lasting repairs to metal and multiple surfaces. Mixed at a ratio of 1:1, it forms a permanent bond and can be shaped, tapped, filed, sanded and drilled after curing. At room temperature, J-B Weld™ sets in 4-6 hours to a dark grey color. A full cure is reached in 15-24 hours. J-B Weld™ has a tensile strength of 5020 PSI and sets to a hard bond overnight. It can withstand temperatures up to 550ºF when fully cured." For a vertical surface like yours, you will want to dam the J-B to keep it where you want. It helps to let it setup for a little while before putting the final coat on. For vacuum or injection in the crack, apply it right away. I find that blue masking tape is good for the dam. You can also keep moving it up with a pop-sickle like stick for a few hours after you apply it. check it every fifteen minutes or so. Last edited by glennpm; 08-20-2020 at 01:38 PM. Reason: Tip |
08-21-2020, 05:04 PM | #28 |
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Join Date: May 2010
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Re: I found a crack in an odd place while pressure testing
It looks like the engine is on the stand , so tilting it horizontal as I stated above would be the best.as the compound is vacuumed in you should see a pattern of the crack slowly sinking into the cracked area, that indicates it is working and allows you to see what portion is being treated, remember to smear a little over the area after the vac. is removed and make sure it does not keep seeping in during the cure time as to avoid a pin hole in the crack surface. I had it seep overnight and had to redo a small area, that was a large cracked though.
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