How many hours should an overhauled engine idle for break-in?

[OwenDella]

An overhauled engine requires approximately one hour of idling for break-in. Here are the precautions for vehicle break-in after an overhaul: 1. RPM: The engine speed should not be too high; it is recommended not to exceed 3,000 RPM. 2. Warm-up: It is best to warm up the engine for a period (usually 3-5 minutes) when starting a cold engine. Once the coolant temperature reaches normal levels, you can drive normally. 3. Avoid sudden acceleration or braking: It is not advisable to drive long distances immediately after an overhaul. Try to avoid sudden acceleration or braking, as this can cause significant impact damage to the engine, hinder the break-in of internal components, lead to excessive gaps between parts, and affect the engine's lifespan in the long run. 4. Maintain steady speed and shift frequently: Try to maintain a steady speed, keeping it between 50-80 km/h. Avoid prolonged low-speed driving, and shift gears frequently to ensure even break-in of all gears.