› Forums › Car Problems & Maintenance › Honda › Is rust in one cylinder a sign my engine block is ruined?
May 15, 2025 at 8:01 pm
#1647
Justin
I’m a Honda technician, and I’m in the middle of building a K24 to take boost for my EK Civic. The K24A4 in that element is pretty solid, can take 400 HP reliably daily. You could try a ball hone and check how much it was chewed out with an inside micrometer and re-ring it. You’ll likely need to punch that cylinder out to the next size over and go from there, though.
Edit: Also, look into replacing the exhaust valve springs while the head is off. They’re notoriously weak and they burn valves out. That’s exactly how I got my K24 I’m building, I saved it from the metal scrap heap due to a burned exhaust valve.