so riding the engine hard isn't a good idea to keep doing? the engine gets ridden hard it's whole running life except when it's cold...i'm not that mean. can it be fixed in these early stages before it becomes bad? how long would it take to become noticeable rod knock and how could this engine have gotten it...it's always got fresh oil. NEVER has overheated before. doesn't burn oil and never has and only has 112K miles.williamb82 said:if it sounds liek pebbles. it is prolly rods. if you keep driving it it will get progressively worse if its rod knock.