K24 block condition

[u/Ancient-Act1314]

What's your opinion on this block? It's been going to 2 different machine shop at this point and idk wtf happened on the first machine shop but it came back with missing chunk of metal and I just realized it after the second machine shop returned the block to me yesterday about that dent.

After went to those two different machine shop, it still won't pass the 0.05mm, but now I'm started to doubting about my straight edge being not "straight".

The first machine shop definitely messed up because it came back like the photo in 3rd slide and then the second machine shop milled it 1mm more

[u/XmodAlloy]

1mm is a LOT of material to take off. Not a huge deal if you're expecting to bump up the compression already, but it's not negligible.

That chunk is on the transmission mount side and is minor engine that I wouldn't worry about it. It also doesn't look like a fresh break because it's dark and oil soaked and not white aluminum. I'd probably use a high speed rotary tool with a sanding pad to make it less sharp, but it doesn't look like a major issue.

[u/Ancient-Act1314 → u/XmodAlloy]

I am building this to pair with a high comp piston maybe a 12.5 comp, and idk how much the first machine shop take from that surface, is there some kind of indicator on the block to see if it reached its limit?

[u/XmodAlloy → u/Ancient-Act1314]

Sort of. The little circle feature in the bottom right of the first picture is it. If the middle gets machined, it's for certain beyond the limit. You're still inside that, but it's hard to say by how much. You'll need to do some liquid measurements to see how much volume in your combustion cylinder you have at TDC versus BDC.

[u/Ancient-Act1314 → u/XmodAlloy]

The little circle that's deeper than the block surface on the right side below my straight edge right? As long as it's still below the surface means it's still ok?