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Bare Engine equipped with variable intake systems

2025-07-22

Rollover causes the connecting rod to bend or break. After the rollover, the oil in the oil pan flows into the air filter, intake manifold, and intake pipe through the general pipeline of the crankcase.

After the Cummins Engine is started, a large amount of oil is sucked into the combustion chamber. During the compression process, the pressure on the top of the piston increases because the oil cannot be compressed.

The connecting rod is bent and deformed, and the connecting rod suddenly breaks due to fatigue when the user drives for a long time.

By investigating whether there is a record of rollover accidents, it can be judged whether there is oil in the air filter and abnormal piston ring height marks.

Crankcase system damage causes oil to top the cylinder, causing the connecting rod to bend or break. For Bare Engine equipped with a variable intake system.

If the diaphragm crankcase ventilation valve is broken, a large amount of oil may be continuously sucked into the intake manifold and gradually accumulated.

When driving at high speed, the long intake duct becomes a short intake duct, and the oil in the intake manifold is immediately sucked into the combustion chamber, causing the top cylinder

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