- Disconnect the battery.
- Drain the coolant.
- Remove the injector tubes, injectors and fuel supply tube.
- Disconnect the power supply wire from the intake manifold. Remove the 4 rubber tips from the spark plugs, unscrew the 4 nuts, remove the current busbar and unscrew the four glow plugs. The spark plug fastening is shown on the right side of Figure 299.
Fig. 299. Cylinder head assembly drawing. 1. Cylinder head cover; 2. Lid gasket; 3. Camshaft bearing cap; 4. Compensating washer; 5. Valve lifter; 6. Valve crackers; 7. Valve spring cup; 8. Valve spring; 9. Valve stem oil deflector cap; 10. Valve spring stop; 11. Valve guide.; 12. Camshaft.; 13. Cylinder head bolt.; 14. Cylinder head; 15. Sealing insert; 16. Cylinder head connection nipple; 17. Cylinder head gasket; 18. Exhaust manifold; 19. Collector gasket; 20. Camshaft oil seal flange; 21. Camshaft gear wheel; 22. Upper timing belt cover; 23 Timing Belt Guide Roller; 24. Return spring; 25. Compensating washer; 26. Valve seat; 27. Valve; 28. Return fuel pipe; 29. Nozzle; 30. Nozzle socket; 31. Seal; 32. Middle timing belt cover; 33. Rubber tip; 34. Current bus; 35. Glow plug; 36. Collector gasket; 37. Intake manifold.
- Remove the timing belt as described in the previous chapter. Also remove the timing gear.
- Disconnect the throttle cable mechanism.
- Remove the coolant drain pipe and the heater pipe. This also releases the engine lifting bracket. There is a gasket under the pipe flange. Disconnect the hose at one end.
- Unscrew the middle cover (32) of the gear belt shown in Figure 299 from the front of the engine.
- Remove the 6 cylinder head cover nuts and sealing washers and remove the cover with the gasket.
- Remove the front engine lift bracket.
- Unscrew the 18 cylinder head bolts evenly, crosswise, in the sequence shown in Figure 300.
Fig. 300. Loosen the cylinder head bolts in numerical order. When tightening, proceed in the reverse order.
- Lift the cylinder head off the cylinder head pins and place it on a workbench. A firmly seated cylinder head can be separated from the cylinder block using a screwdriver inserted between the cylinder head and the cylinder block projection. Do not damage the cylinder head. Remove traces of the old gasket. Do not allow any old gasket residue to enter the cylinder block.