Q&A

 Journeyman

If you for sure the noise is inside the motor you will need to determine if its coming from the top or bottom of the motor. Usually knocks come from the bottom and are caused by a spun bearing either on the crank or piston rod. This is not to say its not in the top end but is more common in the bottom. Top end noise could be caused by rocker arms, cam bearings, or lifter not holding oil. Have a tech determine where the noise is and decide your approach from there.