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What are the effects of revving the engine in neutral gear?

1 Answers

Lilian

07/24/25 7:41pm

The effects of revving the engine in neutral gear include: 1. It can easily cause wear, burning, and abnormal noise in the input shaft bearings and synchronizers of the transmission; 2. Prolonged revving in neutral gear can lead to severe incomplete combustion; 3. Incomplete combustion is more likely to produce carbon deposits, which can clog the three-way catalytic converter, leading to abnormal high temperatures in the converter. High temperatures may cause wiring to self-ignite, with relatively serious consequences. Revving the engine in neutral gear is intended to help the engine achieve optimal internal lubrication and sealing in the shortest time possible. Apart from this, it only serves to increase fuel consumption, and short-term operation will not harm the engine. Revving the engine in neutral gear subjects the moving parts of the engine to significant inertial forces, affecting the engine's reliability and lifespan.

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