What causes oil discharge from the exhaust under exhaust brake operation?

1 Answers
OAurora
07/24/25 1:37pm
The reasons for oil discharge from the exhaust under exhaust brake operation: Damaged cylinder gasket. Poor valve sealing. Excessive clearance between the valve and the guide. Insufficient tension of the piston rings or incorrectly installed piston rings. Piston rings stuck; newly repaired engines not properly run-in, the oil discharge phenomenon will naturally disappear after a period of running-in. Other reasons include: Excessive clearance between the piston and cylinder wall: If the clearance between the piston and cylinder wall is too large and the engine does not reach the proper temperature for a long time, oil leakage faults are prone to occur. Too long low-speed ignition time: This causes the engine temperature to rise too slowly; excessive clearance in the connecting rod bearings increases the amount of oil splashed on the cylinder wall and sucked into the combustion chamber. Injection pressure too low: Injection pump pressure is too low, and the injector pressure is also too low (so-called injector dripping).
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