Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › TorqueToYield bolts Mini Cooper › Reply To: TorqueToYield bolts Mini Cooper April 12, 2021 at 2:29 pm #990034 Richard KirshyParticipant AFAIK… TTY bolts are a one time use item due to the fact they stretch when the proper torque is applied. If in your application they are TTY I would check if their claim is true, if not, replace them.