The point at which it overheats and warps the head isn't far above operating temps, so it's quite likely it would need to be resurfaced as well. Once you add up all the parts and expense, a replacement starts looking pretty good. I went that route for exactly that reason, plus if you aren't doing the work yourself, the price increases rapidly.Why isn’t this engine worth re-building (as some here point out ) ? Why is the motor considered throw away ? I find it hard to believe there is a modern motor not worth rebuilding to gain a margin of performance and reliability , even if it’s not a racing motor , nothing like a hand built / attention to detail motor build .