A diesel leak-off pipe is a component in a diesel engine’s fuel system that plays a crucial role in the leak-off test. Its purpose is to:
- Return excess fuel from the fuel injectors to the fuel tank.
- Allow for the detection of leaks in the fuel injectors or cylinders during the leak-off test.
The leak-off pipe is typically connected to the fuel injectors and the fuel tank. The pipe is pressurized, and any leaks or cracks in the fuel injectors or cylinders will cause fuel to escape through the pipe