My toyota rav4 engine has knocking sound
Unusual for Toyota, have you checked your oil level? If it is a loud knocking, it could be a bad piston in the engine. Did you overheat the car at any point? The alloy head can warp easily if you get the engine too hot. Also check your coolant level to see if you are losing fluid. If the oil is white looking you have a serious issue with coolant mixing with the oil. Is it still under warranty for the powertrain, engine, transmission etc.?
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