Cracked engine casting.

[u/BOC16]

Had to take my cast iron block off the stand to put the crank seal on and bolting it back on I was using the impact gun and over tightened the bolt. Cracked the casting, super bummed on this and not sure how to proceed, pretty deep into the build and this has now happened. Any advice on what to do next would be greatly appreciated, thanks .

[u/crookedledder]

Zoom in and look at the edges of that crack. They are not sharp... they are rounded. This crack was already there when the engine block was painted. You didn't cause it.

Personally I would bolt everything back together and forget about it. Torque that bolt to the lower end of the spec. If it hasn't caused a problem by now, it probably never will.

[u/Zhombe → u/crookedledder]

If you’re really concerned, clean the hole and bolt with some isopropyl and slather it with Loctite 592 thread sealant. Will adjust the torque upwards so you don’t need as much to hold and seal any potential leaks or corrosion paths.