Originally Posted by
2000geezer
Person suggesting jdm swap said that even though rebuilt, a 180k mile motor (mine is 180k) will never run as well as a 30-40k mile motor... also makes sense to me.
This is not exactly true. When you rebuild a motor, you're pretty much rolling the clock back on it to 0 miles. You have to think you're replacing all the worn out parts; rings, seals, gaskets, etc.