For example, when carbon deposits are accumulated during the cleaning and soaking method, the cleaning solution is not cleaned thoroughly, resulting in the top cylinder of the MG Roewe Maxus Engine when restarting.

For Bare Engine equipped with variable intake systems, if the flow rate of the cleaning agent is not properly coordinated with the speed of the MG Roewe maxus engine.

It may lead to excessive accumulation of cleaning agents in the intake manifold, causing the intake port to become short during high-speed driving, and the cleaning agents in the intake manifold to be instantly sucked into the combustion chamber, resulting in cylinder top.

Overturning causes the connecting rod to bend or break. After a rollover, the oil in the oil pan flows into the air filter, intake manifold, and intake port through the universal pipe in the crankcase. After the MG Roewe Maxus Engine is started, a large amount of engine oil is sucked into the combustion chamber.

During the compression process of the piston, due to the inability of the oil to compress, the pressure at the top of the piston increases, causing the connecting rod to bend and deform.

After prolonged driving by the user, the connecting rod suddenly broke due to fatigue while driving at high speeds. It is possible to determine whether there are abnormal traces of oil and piston ring height in the air filter by investigating whether there are records of rollover accidents.

Damage to the crankcase system can cause oil to top the cylinder, resulting in bent or broken connecting rods. For Bare Engine equipped with variable intake systems, if the ventilation valve of the diaphragm crankcase ruptures, it may cause a large amount of oil to be continuously drawn into the intake manifold and gradually accumulate.

When driving at high speeds, the intake port becomes a short intake port, and the oil in the intake manifold is instantly sucked into the combustion chamber, causing the top cylinder.