Section 0 - Engine Disassembly and Assembly - Group 00 Engine Assembly (0-02) M11 Page 0-97 To verify the correct static injection timing for a particular engine, check the control parts list (CPL) number on the engine dataplate, then refer to the CPL Bulletin No. 3379133. Timing codes are listed as two letter alpha characters, for example, an ‘‘HZ’’ code indicates a nomi- nal setting of 5.97 mm [0.235 in]. Refer to the accompa- nying chart. M11 static injection timing can be adjusted by removing the camshaft gear and changing the camshaft key. The camshaft key controls the position of the camshaft lobes during the operating cycles of the engine.
If an offset camshaft key is installed with the arrow marked on the top of the key pointing toward the engine (1), the timing will be retarded . If the offset key is installed with the arrow pointing away from the engine (2), the timing will be advanced . Retarded timing (1) begins the fuel injection process later and advanced timing (2) begins the fuel injection process earlier relative to the position of the piston. Refer to the accompanying chart for a list of offset keys by part number and degree of offset. Static Injection Timing - Checking Install the piston plunger rod (1) of the injection timing tool, Part No. 3823451, into the injector bore of the num- ber one cylinder.