
The engine used by Bestune is produced in China, manufactured at the FAW factory in Changchun, Jilin, and produced on the same production line as FAW Mazda. Depending on the Bestune model, the engine varies. The engine model is CA4GB16, with a maximum horsepower of 109 hp, maximum power of 80 KW, maximum power speed of 4500-5500 rpm, and maximum torque of 155 Nm. The engine model is CA4GB15TD-30, with a maximum horsepower of 169 hp, maximum power of 124 KW, maximum power speed of 5500 rpm, and maximum torque of 258 Nm. For daily maintenance of Bestune engines, the following methods can be used: Use lubricating oil of appropriate quality grade. For gasoline engines, select SD--SF grade gasoline engine oil based on the additional equipment of the intake and exhaust systems and usage conditions; for diesel engines, select CB--CD grade diesel engine oil based on mechanical load, with the selection standard not lower than the manufacturer's requirements. Regularly change the oil and filter. The quality of any grade of lubricating oil will change during use. After a certain mileage, performance deteriorates, causing various problems for the engine. To avoid failures, change the oil regularly according to usage conditions and maintain an appropriate oil level. When oil passes through the fine pores of the filter, solid particles and viscous substances in the oil accumulate in the filter. If the filter is clogged and oil cannot pass through the filter element, the filter element may burst or the safety valve may open, allowing oil to bypass and carry contaminants back to the lubrication area, accelerating engine wear and increasing internal pollution. Regularly clean the crankcase. During engine operation, high-pressure unburned gases, acids, moisture, sulfur, and nitrogen oxides from the combustion chamber enter the crankcase through the gap between the piston rings and cylinder walls, mixing with metal particles from component wear to form sludge. Small amounts remain suspended in the oil, while larger amounts precipitate, clogging filters and oil passages, making engine lubrication difficult and causing wear. Regularly use radiator cleaner to clean the radiator. Removing rust and scale not only ensures the engine operates normally but also extends the overall lifespan of the radiator and engine.

I've been working in auto repair shops for over a decade and have handled the heart of many vehicles. The 4A15 is indeed a member of Mitsubishi's engine family, belonging to their 4A9 series. This 1.5-liter displacement engine features an all-aluminum construction with MIVEC variable valve technology - I've disassembled it during repairs and observed its quite sophisticated internal structure. Many domestic Chinese vehicles still use it today, models like the Leopaard CS9 and Zotye T300 have been equipped with this engine. It delivers smooth power delivery for daily driving with above-average fuel efficiency, and while maintenance costs aren't high, regular timing chain replacement is crucial. Just two days ago I fixed a 4A15 with abnormal vibration - diagnosis revealed excessive carbon buildup in the intake manifold.

Driving my old SouEast V5, there's a 4A15 nameplate sticker under the steering wheel. Mitsubishi handed over this powertrain system to Shenyang Aerospace Mitsubishi for localization back then, and now many domestic cars on the road are equipped with this engine. The 1.5L displacement paired with VVT technology is sufficient for urban commuting but struggles slightly when climbing hills. For regular maintenance, I just change semi-synthetic oil and use 92-octane gasoline - it's run 80,000 kilometers without major issues. I remember having cold start difficulties two winters ago, and the mechanic said it was due to slightly clogged fuel injectors. Overall, this engine is quite reliable, though you need to step on the gas pedal in advance when overtaking on highways.

Studying engine parameters is my daily interest. The 4A15 is the main model in Mitsubishi's 4A9 series, featuring a 1.5L naturally aspirated design with a compression ratio of 10.5:1 and a maximum power output of 83kW. Technically, it inherits Mitsubishi's double overhead camshaft structure, and the variable valve timing system can increase low-end torque by approximately 15%. It is commonly installed in economical cars like the Brilliance Zhonghua H330, known for its lightweight and affordable maintenance. However, the cylinder block's cooling efficiency is inferior to newer engines, making it prone to overheating during sustained high RPMs.


