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Ford 9N, 2N & 8N Discussion Forum
Show Parts for Model:

Re: Tutorial on the LOCKNSTICH method for repairing a crack

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Tall T

08-04-2014 08:26:37
24.108.0.163



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Or Vee it out and LocWeld it and if that fails then braze.

I know that everyone says JB is the ticket and it may very well be the same as LocWeld . . .

but a British car machinist in Victoria B.c. was raving to me one day about cracked MGB HEADS that he repaired with LocWeld. That's a higher level, higher heat repair than a cracked water jacket in the block! Sorry, earlier I said "MGB blocks" by mistake.

So . . . I have always chosen LocWeld. (by the Loctite people) :)

I believe the secret to the success of the product in block repair applications is that the coefficient of expansion of the epoxy and the casting is the same or so similar that the two don't pull apart from each other when the casting expands with heat.

Here's a blurb:

Loctite LocWeld Epoxy Bonding Compound (Automotive Aftermarket Only)

Loctite® LocWeld™ Epoxy Bonding Compound ia a 15-minute, two-part adhesive and filler system that eliminates the need for welding or brazing. Once cured, it can be drilled, sanded, painted, or filed. Resists most automotive, shop and cleaning fluids. Withstands temperatures to 300°F intermittent. Over 3,000 psi shear strength on steel.

If the coefficient of expansion of JB as being the same as that of LocWeld . . . it probably wouldn't matter which product you chose.

I'm pretty sure that LocWeld pioneered the concept because I never heard of JB till years after I started using LocWeld. JB probably scooped the formula from LocWeld. :)
This post was edited by Tall T at 10:12:23 08/04/14 4 times.

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soundguy

08-04-2014 09:16:47
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 Re: Tutorial on the LOCKNSTICH method for repairing a crack in reply to Tall T, 08-04-2014 08:26:37  
Not sure about locweld, but jbweld dates to mid 60's



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Tall T

08-04-2014 09:44:31
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 Re: Tutorial on the LOCKNSTICH method for repairing a crack in reply to soundguy, 08-04-2014 09:16:47  
ah so! (LATE 60's)

The J-B Weld Company was founded in 1969 by Sam and Mary Bonham.
Here's a history of the Loctite corp:

http://www.fundinguniverse.com/company-histories/loctite-corporation-history/

Starts this way:

The story of Loctite Corporation begins at Dr. Vernon Krieble's chemistry laboratory at Trinity College in Hartford, Connecticut, in 1953.

I couldn't see when the LocWeld itself was developed though.
Cheers,

T

P.S.

Sorry but I've got to say that after reading this I would never use JB on any of my engines. They actually put WD-40 in the same category as their JB Weld product!! WD-40 sucks. It has no oxidative stability whatsoever and will turn to gum on a rifle barrel after 6 months at room temperature. Give WD engine heat by using it on Carb linkage and it oxidixesw and turns to glue even quicker. And it DOESN'T cut rust either. It may have its uses like removing lipstick from a window or whatebver but whoever still thinks it is an automotive product is the victim of a sweet smell, a low price a tough sounding name and mass advertizing.

I thought I was seeing things but here from JB's own site:

"We Take Pride in Making It. You Take Pride in Using It.

Ask an avid DIYer, a mechanic, or any repair professional what he has to have in his toolbox, and he’s sure to tell you about tried-and-true staples like duct tape, WD-40®, and of course J-B Weld"

Get serious, go industrial!

In a previous post I mentioned MGB "blocks" but that was a typo!

LOCWELD WILL REPAIR CRACKED HEADS!

Sorry for the rant but it has to be said.

I sold Amsoil MP to the Advance Lock and Safe company in vancouver, and it literally dissolved the GUM that WD-40 was leaving in their safe lock mechanisms. . . AND the Amsoil NEVER OXIDIZED, NEVER turned GUMMY.

One sheet metal man asked me to look at the sticky linkage on his V-8. I hollered into the shop, "What have you been spraying on your linkage, WD-40? He says, "How the H*ll did you know that?" I said that even at room temperature it turns to glue in 6 months on a rifle barrel.

I'm not making this stuff up and I'm not a competitively spirited person.

Terry
This post was edited by Tall T at 10:40:18 08/04/14 4 times.

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soundguy

08-04-2014 10:46:18
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 Re: Tutorial on the LOCKNSTICH method for repairing a crack in reply to Tall T, 08-04-2014 09:44:31  
wd 40 was never meant to be a penetrant.

good at displacing water though!

PS.

wd-40 brand DOES have a penetrant out now. but it is not wd-40. I have not used it... i use pb blaster and kroil mostly..



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Tall T

08-04-2014 10:54:49
24.108.0.163



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 Re: Tutorial on the LOCKNSTICH method for repairing a crack in reply to soundguy, 08-04-2014 10:46:18  
I'll have to try that Blaster and the other but i've never seen them up here in Igloo land.



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dogsled1

08-05-2014 17:33:20
173.16.168.13



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 Re: Tutorial on the LOCKNSTICH method for repairing a crack in reply to Tall T, 08-04-2014 10:54:49  
Quoting Removed, click Modern View to see

PB Blaster is fantastic at loosening rusted bolts, etc. I bought a gallon can here because it was on clearance for $4. Wish I had bought more.



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