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Old 06-14-2021, 06:52 PM   #21
jerrytocci
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Default Re: Is my block dead?

I fixed one like that with JB WELD use a mirror and bevel the crack and then use clear tape to hold the weld in place. You have nothing to lose and engine stays where it is
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Old 06-14-2021, 07:03 PM   #22
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Default Re: Is my block dead?

Let this be a lesson about using antifreeze. If engine is good runner, JB weld. If rebuilding, have it soldered or welded. It's very common up here in the north country. I rode behind a model A engine in a pietenpol airplane that was cracked nearly the full length. Fix it, keep an eye on it, don't worry about it.
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Old 06-14-2021, 08:22 PM   #23
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Default Re: Is my block dead?

Quote:
Originally Posted by eagle View Post
Let this be a lesson about using antifreeze. If engine is good runner, JB weld. If rebuilding, have it soldered or welded. It's very common up here in the north country. I rode behind a model A engine in a pietenpol airplane that was cracked nearly the full length. Fix it, keep an eye on it, don't worry about it.

Well I didnít do it. Iíve owned it for over 26 years and itís never run in that time. I was too young and did t have a place, time, or money to work on it. Now I am starting. It hasnít had any water or coolant in it for 26-35 years. Hoses removed, etc. I now think because this crack was already there before then. Iíll expand in some more posts.
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Old 06-14-2021, 08:25 PM   #24
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So I got in and cleaned out what I can. Itís impossible with the position to get it 100% clean. Looks like it happened a long time ago and this was a JB Weld fix that has now failed. Looks like itís got a drill hole in one end of the crack. Big hole in the middle that is full of ďsomethingĒ that is soft under a sanding wheel. Guessing JB Weld.

Can only upload 1 picture at a time on my phone.
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Old 06-14-2021, 08:26 PM   #25
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Looking like itís JB Weld round 2
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Old 06-14-2021, 08:53 PM   #26
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Best one i can get with the angle and lighting
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Old 06-15-2021, 05:04 PM   #27
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Default Re: Is my block dead?

I'm just learning Model As but know a thing or two about welding and metalwork.

Welding cast iron is a PITA and half the people who claim they can, can't. Its preheat, post cool, the right filler/electrodes, and its always risky. An old saying in the welding trade is "The correct way to weld cast iron is to get someone else to do it..."

If you can braze it, that's considerably easier.
Use a scribe to alternate-mark your faint end-cracks and groove them with a cutting wheel (they tend to vanish when you grind groove them and are hard to keep track of). A 3" wheel on a die grinder is super handy for this.

JB Weld in applications like this is basically like 'hard caulk'. There's little surface adhesion and its not going to really get into the light cracks, which is where the risk is that they get worse.
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Old 06-15-2021, 06:12 PM   #28
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Default Re: Is my block dead?

Quote:
Originally Posted by psimet View Post
Been going through a long series of steps to get my 28 Tudor up and running after sitting for at least 25-35 years.

I decided to flush the water jacket running water through it from a hose. After 40 or so gallons I noticed a couple of small drops on the ground from the rear of the engine.

Found a crack in the block that was weeping. Cylinder 4. Under the edge of the lip on the drivers side. Picture is looking up at it.

Ran the borescope into each cylinder and not water in them. Also no water in the oil.

Options?

No your block isn't dead we can repair it permanently without welding and without JB weld. We've repaired blocks in worse condition than yours.
http://www.jandm-machine.com/metalStitching.html
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Old 06-15-2021, 07:35 PM   #29
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Default Re: Is my block dead?

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Originally Posted by Model_A View Post
I'm just learning Model As but know a thing or two about welding and metalwork.

Welding cast iron is a PITA and half the people who claim they can, can't. Its preheat, post cool, the right filler/electrodes, and its always risky. An old saying in the welding trade is "The correct way to weld cast iron is to get someone else to do it..."

If you can braze it, that's considerably easier.
Use a scribe to alternate-mark your faint end-cracks and groove them with a cutting wheel (they tend to vanish when you grind groove them and are hard to keep track of). A 3" wheel on a die grinder is super handy for this.

JB Weld in applications like this is basically like 'hard caulk'. There's little surface adhesion and its not going to really get into the light cracks, which is where the risk is that they get worse.
I have always heard that you reverse the leads on the welder....
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Old 06-16-2021, 12:15 PM   #30
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Default Re: Is my block dead?

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I have always heard that you reverse the leads on the welder....
That only works w/DC welders.
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Old 06-16-2021, 12:35 PM   #31
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I had a block that I repaired with JB Weld and drove the car another 10 years that way. I wouldn't push your luck by drilling at the ends of the crack. Just wire wheel it, maybe put some metal prep on it to etch the metal like you were going to paint it and then press in the JB with a putty knife. You haven't got anything to loose making this repair.
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Old 06-16-2021, 03:25 PM   #32
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I had a block that I repaired with JB Weld and drove the car another 10 years that way. I wouldn't push your luck by drilling at the ends of the crack. Just wire wheel it, maybe put some metal prep on it to etch the metal like you were going to paint it and then press in the JB with a putty knife. You haven't got anything to loose making this repair.
I am leaning this way. The last pictures I posted are after wire wheel, sanding, anything I could get in there to clean. I figure I will use acetone to clean it up and throw the JB weld on. I would MUCH prefer to get it stitched but this thing hasn't run in 25-35 years. I have no idea how well it runs and definitely don't have the engine hoist, etc to get it pulled and sent out to get fixed.

I figure if I use JB Weld and find it all runs well and I am saving it then find a year in the coming years to pull the engine and re-do it and get the block fixed.

Honestly wish I could find someone that would swing by my house and be able to stitch it in the car, working upside down. I'd pay more than I should to have that done.
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Old 06-16-2021, 06:38 PM   #33
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Default Re: Is my block dead?

Okay now that you have decided to go with using the J.B. Weld here is something that I do in a situation like yours where the J.B. will be clinging to vertical / underside of a surface.
J.B. Weld has a tendency to sag and droop until it starts to set up. I mix up a small test batch and then 10 minutes after that I mix up the actual batch that I will be using to do the repair. Keep testing the first bit you mixed up and when it starts to set you know that you have 10 minutes of working time to get the second batch of J.B. into place. That way you won't have to fuss around too long keeping it where it needs to be.
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Old 06-16-2021, 06:45 PM   #34
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Okay now that you have decided to go with using the J.B. Weld here is something that I do in a situation like yours where the J.B. will be clinging to vertical / underside of a surface.
J.B. Weld has a tendency to sag and droop until it starts to set up. I mix up a small test batch and then 10 minutes after that I mix up the actual batch that I will be using to do the repair. Keep testing the first bit you mixed up and when it starts to set you know that you have 10 minutes of working time to get the second batch of J.B. into place. That way you won't have to fuss around too long keeping it where it needs to be.

Sweet. Thatís a golden idea.


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