134141-0320 ZEXEL 9 411 612 421 BOSCH PLUNGER-AND-BARREL ASSY 9411612421 1341410320 1676099707

1. Disconnect the fuel ratio control sensing line (1). Remove the sensing line clamp bolt (2).2. Disconnect the air compressor water return line (6). 3. Remove the cylinder head air inlet line (3).4. Remove the retaining bolts (4) and the fan drive mounting bracket (5).5. Remove the cylinder head retaining bolts. Attach a hoist and remove the cylinder head assembly - weight 164 lbs. (74,4 kg).Install Cylinder Head
1. Thoroughly clean the sealing surfaces of the cylinder head and cylinder block. Position a new head gasket on the engine and install the cylinder head.2. Install the push rods and rocker shaft assembly.3. Coat the threads of the cylinder head retaining bolts with 4S9416 Anti-Seize Compound. Install bolts and washers, and tighten them in the following sequence: 1 - Tighten all numbered bolts in numerical order to 115 lb. ft. (15,9 mkg).2 - Retighten all numbered bolts in numerical order to 175 5 lb. ft. (24,2 0,7 mkg).3 - Finally, retighten all numbered bolts (hand torque only) in numerical order to 175 5 lb. ft. (24,2 0,7 mkg).4 - Tighten all lettered bolts in alphabetical order to 22 lb. ft. (3,0 mkg).5 - Retighten all lettered bolts in alphabetical order to 32 5 lb. ft. (4,4 0,7 mkg).6 - Finally, retighten all lettered bolts (hand torque only) in alphabetical order to 32 5 lb. ft. (4,4 0,7 mkg).4. Adjust the inlet and exhaust valve clearance as covered in INSTALL ROCKER SHAFT ASSEMBLY AND PUSH RODS.5. Connect the air compressor water return line.6. Connect the fuel ratio control sensing line and install the sensing line clamp bolt.7. Install the fan drive mounting bracket and retaining bolts.concluding steps: a) install water temperature regulatorb) install valve coverc) install precombustion chambersd) install exhaust manifold