So I had a coolant leak so I thought at over flow hose at rad cap. I bought new rad cap and hose to recovery tank.. but still leaked. So at idle no leak from cap or hose. But had my son set on the throttle and at high rpms the coolant is coming out the rad cap. Can anyone tell me what the issue is so I can fix. Truck does not leak coolant anywhere else, no coolant in the oil and truck does not overheat at. If anyone has remedy please help....getting fustrated. Thank you!