Fuel Rail: Description and Operation

GF07.03-P-6110P Rail, Component Description
ENGINE 642 in MODEL 164.1 /8, 203.0 /2, 221.0 /1, 251.0 /1 up to Model Year 2008
ENGINE 642 in MODEL 209.3 /4, 211.0 /2 /6, 219.3
ENGINE 642 in MODEL 461.3, 463.3 up to 31.5.12





21 Left rail
22 Right rail
B4/6 Rail pressure sensor
Y74 Pressure regulator valve

Location
The left rail and the right rail are located above the respective cylinder head.

Task
The left rail and the right rail serve as high-pressure reservoirs and are responsible for fuel distribution to the fuel injectors (Y76). In addition, the left rail serves as the mount for the pressure regulation valve and the right rail as the mount for the rail pressure sensor.