High Quality VE1 Delivery Valve 090140-1990 Diesel Engine Spare Parts

A fault in the oil outlet valve will have adverse effects on the engine's starting, power output, fuel economy, working stability and service life, as follows:

Difficult to start or unable to start
When the oil outlet valve is not sealed tightly, the fuel will leak from the loose seal during startup, resulting in insufficient pressure in the high-pressure oil pipe, and the injector cannot spray normally, making it difficult to start the engine.

If the oil outlet valve is stuck in the closed position, the fuel cannot enter the high-pressure oil pipe at all, and the engine will not be able to obtain fuel supply and cannot start.

Insufficient power output
Wear of the oil outlet valve or weakened spring elasticity will make the residual pressure in the high-pressure oil pipe unstable or reduced. During the injection process, the fuel injection pressure is insufficient, the injection speed slows down, and the fuel cannot be fully and timely injected into the cylinder, resulting in incomplete combustion, affecting the engine's power output, and causing phenomena such as weak acceleration and difficulty in climbing.
The oil outlet valve is stuck or the decompression function fails, which may cause inaccurate injection time, so that the fuel cannot be injected into the cylinder at the best time, and also cause the engine power to decrease.

Fuel economy deteriorates
Due to the failure of the oil delivery valve, the fuel injection amount is inaccurate and the combustion is incomplete. A large amount of unburned fuel is discharged with the exhaust gas, resulting in fuel waste and a significant increase in the fuel consumption of the engine.
Uneven fuel injection may also cause the engine to over-inject fuel under some working conditions, further deteriorating fuel economy.

Unstable engine operation
Fuel delivery valve failure will cause uneven fuel injection in each cylinder. Some cylinders have normal fuel injection, while some cylinders have too much or too little fuel injection, resulting in inconsistent combustion conditions in each cylinder, engine shaking, unstable idle speed, and increased operating noise.
During acceleration or deceleration, due to the failure of the oil delivery valve to work properly, the response speed of fuel injection slows down, the engine speed changes unsteadily, and a setback occurs.

Intensified damage to engine parts
The incomplete combustion and pressure fluctuations caused by the oil delivery valve failure will cause the internal parts of the engine to be subjected to uneven pressure and temperature, accelerating the wear of parts such as pistons, piston rings, and cylinder walls.
Abnormal fuel injection and combustion conditions may also lead to increased carbon deposits on valves, spark plugs and other components, affecting their normal operation, and even causing faults such as poor valve sealing and spark plug ignition, further shortening the service life of the engine.