it is high mileage, 219g, but the thing is that it ran fine before i took it apart. somebody told me to check the valve clearance, but i set them yesterday, and rechecked them today and dont think i couldve done anything that off with the clearance. i'm sure my car will run like this, but it sounds like somethings gonna be worn out or destroyed soon. the motor is in really good shape(or was).