What causes the rattling sound in the Prado 4000 engine?
1 Answers
Prado 4000 engine rattling sound reasons are as follows: Impact of inferior engine oil: Inferior engine oil, prolonged periods without oil changes, or insufficient oil levels can easily increase friction between the valves and guides, as well as in areas like the hydraulic lifters, thereby amplifying various sounds within the engine. Valve noise: After starting the engine, a "ticking" sound is heard, which is the sound of the valves, especially noticeable when the engine is cold. This occurs because the oil pressure hasn't built up yet, and the valves aren't properly lubricated. The sound typically subsides after a short while. This is common if your vehicle has been parked for an extended period.