Cylinder Head - Rebuild (2-02) Section 2 - Cylinder Head - Group 02 M11 Page 2-10 Remove the valve seals from the valve guides. Inspection Use clean 15W-40 oil to lubricate the injector o-rings. Install a set of injectors with new o-rings in the cylinder head. Refer to Section 0 for proper o-ring orientation. Install the injector holddown clamps and mounting capscrews. Torque Value: 75 [55 ft-lb] Install a 0-160 psi pressure gauge, Part No. 3375275, to the fuel outlet fitting. Install an air supply line to the fuel inlet fitting. Apply air pressure to the cylinder head. Air Pressure kPa psi 550 MIN 80 690 MAX 100 Close the air supply valve and visually inspect the fuel passages for leaks.
Record the air pressure on the gauge. The air pressure must not decrease on the gauge for at least fifteen sec- onds. If the air pressure decreases, use a solution of soap and water on the fuel passage areas and pipe plugs to find the leaks.