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Discussion Starter #1 (Edited)
my water pump failed which caused my mechanical fan to fail which flung fan blades into my radiator and hoses. i got new everything but then when i took off my old water pump the block behind it is cracked. can't simply get new block so i may weld / jb weld / ***8230;? any advice would be greatly appreciated. 2001 M3
 

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If that happened from over heating you might have other problems like a head gasket/warped head. Did the car overheat or did you shut it down in time? Either Way i don't think jb weld is guna be the way to go. If you try to weld it at least groove it out a little bit.
 

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Your going to need this part wielded . Would suggest that you find someone who is experienced with wielding aluminum and have the car towed to them, unless that have a rigg to bring the equipment to you.
 

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Discussion Starter #9
Its a cast iron block in e46 m3. I will most likely go with this option (welding) to try to salvage my motor. Car didnt overheat, will attach wider angle photo later
 

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Discussion Starter #10
If anyone knows of trusted welder in the area please let me know. I can tow within hour radius of chester nj 07930
 

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Its a specialist job welding cast iron. You cant go to any old welder the block might need to be pre heated to stop it cracking further.
 

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Discussion Starter #13
Cant find anyone to do it. May have to swap new complete motor or sell. Sucks i just installed afe exhaust rogue short shift h&r springs bilstein shocks str wheels tires mishimoto fan and radiator...
 

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Contact a classic car restoration specialist they might be able to help.

There used to be a technique called "stitching" to fix cast iron blocks.
 

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To weld cast it will have to be pre and post heated. It's say you definitely want to find an experienced welder. Are you liking for a welder at an auto shop? Might want to look for a dedicated welding shop.

Edit: so if it didn't overheat, it apparently happened from the pump and the fan blades failing? I wish i was close to you, i welded a cast iron part on my dad's Subaru legacy a little over two years ago and it's still holding strong to this day. Hopefully it's a timing cover that can just be swapped out as said above. That would be way less of a pain in the a$$
 

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Discussion Starter #18
Not a cover its the block. Found motor for 2500.. need to find way to justify swap.. performance mods that require engine to be out?
 
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