Tutorial on the LOCKNSTICH method for repairing a crack i...

FarmerHR

Member
There is a very tight crack in my water jacket on
a newly acquired Ford NAA tractor. The crack is
between a freeze plug and the boss for the oil
filter mounting surface. The crack does not
appear to run to any holes in the block. It weeps
in two places about 1/8 teaspoon in 30 minutes
with the engine running.
I am considering the LOCKNSTICH method. Does
anyone known where I can find a tutorial on this
method ? I have never done one before.
Also should I consider any other method of repair
?
Thank you for your help.
 
I have stitched a block and it has held up for several years. Also have one that was repaired with JB Weld - no leaks in 10 plus years.
 
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 [b:8329ec1188]HEADS[/b:8329ec1188] 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. :)
 
I have done several blocks and heads. Call Lock N stitch. They will send you the CD's when you order the tools and stitching from them. Don't go into shock when you see the prices of the taps etc. I have never had a come back on a repair that I have made.All depends if you want it fixed right, permanently or just patched up to send it down the road for someone else to deal with.
 
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
 
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..
 

I'll have to try that Blaster and the other but i've never seen them up here in Igloo land.
 
I've been a gun collector and shooter for 30 plus years. Number one rule is NEVER EVER use WD-40 on any firearms for any reason. Gums everything up when your life may depend on it.

Kroil is very popular with firearms it does what WD-40 claims to do. Many good machinists use it on their fine tools.

But I gotta admit PB blaster has gotten me outta plenty jams.
 
(quoted from post at 11:24:39 08/04/14) kroil even says it's safe for gun cleaning. :)

Kroil is actually a cleaner/penetrant and WD-40 a water displacement chemical. Last I used it was to soak an 8N governor I picked up off of ebay for $35. Left it in there for a few days and little elbow grease and it looks better than new.

I also soaked an old Chief Special 38 in Kroil that was heavily rusted for about a week. Other than the pitting in the metal, it shoots just fine.

The only draw back to Kroil is if you need to soak big parts than it costs too much. So that's when I use an old recipe of 2 gals Diesel, 1qt ATF, 1qt 97% rubbing alcohol.
 

Greywolf,

Glad you mentioned that.
When I used to sell it, gun shops that used Amsoil MP raved about it because it kept customer fingerprints off the barrels and left a nice dry film that never got tacky!

AND it cuts rust like you wouldn't believe as well.
So to me it is the best all around, because as a super rust penetrant it keeps future rust form ever forming on or in the gun, but does so with a LIGHT AND STABLE protective film.

cheers,
T
 
(quoted from post at 10:54:49 08/04/14)
I'll have to try that Blaster and the other but i've never seen them up here in Igloo land.

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.
 
"When I used to sell it, gun shops that used Amsoil MP"....

Forgive me for saying so Terry, but it sounds to me like
you're still trying to sell it! I know it's hard not to brag on
something you believe in, much like children! :)
 
(reply to post at 20:43:23 08/05/14)

..........Forgive me for saying so Terry, but it sounds to me like
you're still trying to sell it! ...........

That's funny, Royse! Today, I was working on a riding mower I had given to my daughter. There was some surface rust on the deck that was causing the pulleys to hang when engaging the blades. Went into the shop to look for something to clean it up and the next that that came to mind was Tall T's Amsoil advertisements....
 
(quoted from post at 17:43:23 08/05/14) "When I used to sell it, gun shops that used Amsoil MP"....

Forgive me for saying so Terry, but it sounds to me like
you're still trying to sell it! I know it's hard not to brag on
something you believe in, much like children! :)

Just trying to get it through your thick head is all. :D
But if you think that it is more my sounding my own horn, or just being enamored with my own personal choices, than trying to do you a good turn by turning you onto a fabulous product, then that's good to know and I'll stop.

TT
 

Local machine shop stitched a long crack in a Ford block for me last year... It was less that $100 they did a nice job...
 
(quoted from post at 21:27:00 08/05/14)
(quoted from post at 17:43:23 08/05/14) "When I used to sell it, gun shops that used Amsoil MP"....

Forgive me for saying so Terry, but it sounds to me like
you're still trying to sell it! I know it's hard not to brag on
something you believe in, much like children! :)

Just trying to get it through your thick head is all. :D
But if you think that it is more my sounding my own horn, or just being enamored with my own personal choices, than trying to do you a good turn by turning you onto a fabulous product, then that's good to know and I'll stop.

TT
Won't deny I have a thick head! :)
Also won't deny it's a good product.
To me Amsoil makes great products, but pricey.
There are cheaper alternatives that will get the job done.
None of them have anything to do with the LockNStitch block
repair though. :oops:
 
What am I saying, I can't quit! :D

Even went to a workshop to try and quit

OK I'll lower my guns

:)

This Amsoil advertisement was brought to you by
The Thread Hijackers :oops:

P.S.
Pricey I know
that's why I quit being a dealer
but the MP is waay worth it!
 

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