At 00:35, anything to worry about? 2014 Prius C, about 100k miles, cold start. Runs and drives fine, MPG normal, no lights on the dash. Kinda intermittent, only happens when cold. Don't really notice it after it's warmed up or when driving on the highway. Seems to be more noticeable when the engine is coasting and at low speeds. I guess that's when the oil pump would put out the lowest pressure. Thinking valves or timing chain/tensioner. Thoughts? Thanks, D
