What is Cold Running-in for New Cars?
1 Answers
Cold running-in for new cars refers to the process where the engine's internal components transition from their initial manufactured state to an operational state before reaching normal working temperature. After this running-in period, the surfaces of these parts become smoother, the contact area between components increases, and their fit becomes tighter, preventing localized overheating and potential sintering under extreme conditions. Cold running-in procedure: Before driving: Pre-warm the cold engine. Newly manufactured vehicles still have component wear, so proper pre-warming is necessary; While driving: Shift gears promptly. For manual transmissions during the running-in period, proper gear shifting is essential. Use appropriate gears for different driving conditions to avoid high-gear low-RPM or low-gear high-RPM situations; During maintenance: New vehicles require timely maintenance during the running-in period. The first service is particularly important—timely completion ensures safer vehicle operation. Cold running-in precautions: Pre-warm the cold engine for 30 seconds to 1 minute before moving; Avoid overloading during running-in; Pay attention to fuel and oil quality; Control driving speed; Avoid sudden acceleration, speeding, and emergency braking; Address any malfunctions immediately; Ensure sufficient engine oil, coolant, and proper tire pressure with no leaks—replenish if deficient. Cold running-in for automobile engines refers to the process where the engine is mounted on specialized equipment and run by an electric motor. Key information about new car cold running-in includes: 1. When the engine operates normally without generating high temperatures from fuel combustion, it's called cold running-in. 2. Conversely, hot running-in typically refers to engine operation in the vehicle through fuel ignition and combustion. 3. Running-in describes the initial break-in period when the engine is driven by motor power before reaching working temperature. 4. Most component wear occurs during cold running-in, so avoid excessive force during this phase.
