Does Revving in Neutral Damage the Car?

1 Answers
DiMaddox
07/30/25 9:30am
Revving in neutral does damage the car. Below are the reasons and principles of why revving in neutral harms the vehicle: Reasons why revving in neutral damages the car: If the accelerator is pressed for a prolonged period, it can be destructive to the car, leading to carbon buildup. Extended idling in neutral can harm the engine. In neutral, the engine is under no load, and suddenly pressing the accelerator causes certain components inside the engine to bear significant inertial forces, which can shorten the engine's lifespan. Principles of why revving in neutral damages the car: From a mechanical standpoint, when revving in neutral, although the gear is in neutral, the engine's power drives the transmission's input shaft through the clutch, keeping it in a working (rotating) state. At this time, pressing the accelerator means that, except for the output shaft and the synchronizers of each gear not rotating, components like the input shaft, intermediate shaft, and the constantly meshing gears on the shaft will change with the engine's RPM. Prolonged revving in neutral or long-distance coasting in neutral is harmful to the transmission, potentially causing wear, burning, or damage to the input shaft bearings, synchronizer gears, and synchronizers, leading to transmission noise and other issues.
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