For Ford Custom Euro 6 injector bolts, a two-stage tightening process is common: first, an initial torque of 8 Nm, followed by an additional 180 degrees of turn. This angle tightening is crucial for the stretch bolt to properly seal the injector and prevent combustion gas leaks,
OR
Stage 1: 9 Nm
Stage 2: Loosen: 45°
Stage 3: 6 Nm
Stage 4: 180°
You need to make sure that the threaded bolt hole is completely clean and free from fluids and debris
Many injector hold-down bolts are designed for single use and should be replaced with new ones each time the injectors are serviced.
Ensure your torque wrench is properly calibrated and used correctly to apply the specified torque value accurately,