The reasons why the Kia Smart Sport engine pulls the cylinder are: 1. Insufficient cylinder lubricating oil or oil supply interruption; 2. Insufficient running-in and eagerness to operate at high load; 3. The piston temperature is too high and the lubrication is poor; 4. , Too much carbon deposits, causing the piston ring to stick to the ring groove and lose its elasticity, causing breakage or gas leakage; 5. Use inferior gasoline. Taking the 2019 Kia Smart Sport as an example, its body structure is a five-door, five-seater SUV. The body dimensions are: 4460mm long, 1850mm wide, 1695mm high, with a wheelbase of 2640mm, a fuel tank volume of 58l, and a curb weight of 1475kg.