How to Disassemble the Yanmar 3TNV series and 4TNV series Engine Cylinder Head: Disassembly, Inspection and Reassembly

 This article describes how to disassemble the Yanmar 3TNV series and 4TNV series engine Cylinder Head: Disassembly, Inspection and Reassembly

 For Yanmar Diesel Engine Agriculture Excavator Tractor Marine Generator Diagnostic tool

 

 09.2024 Yanmar SA-Direct 2.45 Offline Diagnostic Software

  Disassembly procedure:

Disassemble in the order of the numbers shown in the illustration.

1) Remove the alternator assy. (Point1)

2) Remove the fan, pulley and V belt.

    3) Remove the thermostat case. (Point2)

                        4) Remove the fuel filter and fuel oil piping. (Point3) 

5) Remove the oil level gage assy. 

6) Remove the oil filter. (Point4)

            7) Remove the fuel injection pipes. (Point5)

8) Remove the intake manifold assy.

9) Remove the exhaust manifold assy.

10) Remove the rocker arm cover Assy.

                                              11) Remove the rocker shaft assy, push rods and valve caps. (Point6)

                                12) Remove the cylinder head assy and head gasket. (Point7)

                                       13) Remove the fuel injection valves and fuel return pipe. (Point8)

                                             14) Remove the intake/exhaust valves, stem seals and valve springs. (Point9)

15) Remove the rocker arms from the rocker shaft.

2018 Yanmar Engine Diagnostic Service Tool Software