fourzeronine
Well Known Member
Here's an interesting way to fix cracks in the side of a block. You'll note they're doing it to a W-engine, too.
Do you know if the block, as a whole, was preheated before the welding began? Did the repairman start with a cold engine?A friend has a torch similar to that. I have used it for hard surfacing combine parts. It requires propane, oxygen and hard surfacing powder.
I wonder what powder they are using for cast? And what gas they are using? You're right, very interesting crack fix.
Easy. Do the rough work before the precision work. The idea behind heating the parts before welding helps with that very issue among other benefits.How straight was the line bore, the decks, and how round were those cylinders after that? That block had to walk around after that! Interesting video,though.
Sounds like you are talking to the wrong welders. What ever has been done can be ground out and fixed. I have a 348, mig welded across the side, normal crack. Also an 2.5 exh man I welded the flange back on at #8. For the hard stuff I goto Rays cracked head repair. I have a block he did the main web on, waiting for me.I have a welded 348. Water jacket. Weld porosity turned into nightmare leaks. Every professional weld shop I talked to in my area to fix it refused and said It should have been brazed, then they could do something with it. So im stuck w/ locktite 290 and blue devil.
I have a 409 block that's been ground into the water jackets when clearancing for a big-stroke crank and needs to "saved". Was figuring I'd either try the Muggy Weld rods or try to TIG it myself. Upon finding this video I thought something like this process might be an option if I could find it.