Cylinder Head - Rebuild (2-02) Section 2 - Cylinder Head - Group 02 M11 Page 2-16 Measure the width of the valve seat area (1) of the valve seat inserts. Valve Seat Area (Width) mm in 1.63 MIN 0.064 2.69 MAX 0.106 If the valve seat area is worn wider than the maximum specified, refer to Grind the Valve Seats following in this procedure, or Cylinder Head Valve Seat Insert - Replace- ment (2-04). Caution: Support the cylinder head in the Part No. ST- 583 Head Holding Fixture to prevent damage to the in- jector tip that protrudes from the combustion face. Apply a bluing compound to the outside diameter of the injector at the injector sleeve seat area.
Install the injectors into the cylinder head without o-rings. Torque Value: 75 [55 ft-lb] Turn the cylinder head over and use depth gauge, Part No. 3823495, to measure the injector tip protrusion. Injector Tip Protrusion mm in 2.28 MIN 0.090 2.65 MAX 0.104 Remove the injectors from the cylinder head. The bluing pattern of the injector seating area (1) must be approximately 13 mm [0.50 inch] from the cylinder head combustion face surface. The injector bore seating width (2) must be a minimum of 1.52mm [0.060 inch].
If the injector protrusion is more than the maximum speci- fied or the injector sleeve bluing pattern does not meet the specifications given, the injector sleeve(s) must be replaced. Refer to Cylinder Head Injector Sleeve - Re- placement (2-07).