Opening Pressure
- Install injector on nozzle tester. See Figure . Engage pressure gauge. Slowly depress lever and read injector opening pressure. Nozzle should open at 1645-1788 psi (115-125 kg/cm2 ) on non-turbo models, 1788-1930 psi (125-135 kg/cm2 ) on turbo models.
- To adjust opening pressure, change shim thickness. Thicker shims will increase opening pressure; thinner shims will decrease it. Shims are available in thicknesses from .040-.077" (1.00-1.95 mm) in increments of .002" (.05 mm).
- A .002" (.05 mm) shim will increase opening pressure by approximately 71 psi (5 kg/cm2 ). If opening pressure is incorrect, perform leak test before cleaning and adjusting.