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I'm hoping aametalmaster will chime in on this as he's posted successful results with this wire on cast parts. I have 44-30 wire coming in the next week.
I recently found a crack starting at the drain plug boss in my 351W engine block, seen in the image below. I'd like to try and repair this in the car without pulling the motor out and tearing it down. I understand that this would best be done as a bare block, with a pre- and post-heat, however if I'm going to tear it down that far I'd probably just go with a different long block.
This area on the motor will never see any stress, but it will obviously be subject to tons of thermal cycling in operation between 30-220F.
Welder is a Miller 211. My plan is to find the end of the crack and drill through it to the coolant passage with a 1/8" or 3/16" bit, and then cut 1/8" deep bevel along the crack. The crack is a little over an inch long.
My questions are as follows:
- Any suggestions on settings for the Miller 211 using this .035 wire? I do not know what the water jacket thickness is yet, but I would guess ~1/4"
- Should I try to minimize the heat and weld it in very short (<0.25") stitches, allowing it to cool completely between welds? Would even a series of tacks be adequate? I'm trying to stop it from cracking further and seal out ~15psi water.
- Do I need to hammer peen the weld as it cools?
- Do I have a chance in **** of welding this without it cracking?
I recently found a crack starting at the drain plug boss in my 351W engine block, seen in the image below. I'd like to try and repair this in the car without pulling the motor out and tearing it down. I understand that this would best be done as a bare block, with a pre- and post-heat, however if I'm going to tear it down that far I'd probably just go with a different long block.
This area on the motor will never see any stress, but it will obviously be subject to tons of thermal cycling in operation between 30-220F.
Welder is a Miller 211. My plan is to find the end of the crack and drill through it to the coolant passage with a 1/8" or 3/16" bit, and then cut 1/8" deep bevel along the crack. The crack is a little over an inch long.
My questions are as follows:
- Any suggestions on settings for the Miller 211 using this .035 wire? I do not know what the water jacket thickness is yet, but I would guess ~1/4"
- Should I try to minimize the heat and weld it in very short (<0.25") stitches, allowing it to cool completely between welds? Would even a series of tacks be adequate? I'm trying to stop it from cracking further and seal out ~15psi water.
- Do I need to hammer peen the weld as it cools?
- Do I have a chance in **** of welding this without it cracking?
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