High Pressure Oiling System
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- High-pressure oiling system supplies oil pressure for fuel injector operation. See Figure. During initial start or cold start, gear-driven high pressure oil pump receives unfiltered engine oil from driver-side valve lifter oil galley through anti-drain check ball.
- Once engine starts or during warm engine starts, anti-drain check ball closes and high pressure oil pump receives filtered engine oil from high pressure oil pump reservoir.
- High-pressure oil pump delivers engine oil through oil rail in cylinder head at pressures of 600-3000 psi (42.19-210.93 kg/cm2 ) to fuel injectors.
- During initial start or cold start, the high pressure oil pump receives unfiltered oil from the left side valve lifter oil gallery through the anti-drain back check ball valve.
- Once the engine starts or during warm engine starts, the check ball closes and the high pressure oil pump receives filtered oil from the high pressure oil pump reservoir.
- The high pressure oil pump pumps the oil under extremely high pressures 600-3,000 psi (42-211 Kg/Cm2 ) through the left and right side high pressure supply hoses to the high pressure oil rails (integral to the cylinder heads).
- Once in the oil rail, the oil is fed to the fuel injector bores through 4 oil feed galleries drilled and machined in the cylinder head. The high pressure oil then actuates the fuel injectors.