- 1. Decorative engine cover
- 2. Filler cap
- 3. Cylinder head cover bolts
- 4 Cylinder head screw washer
- 5. Valve cover
- 6. Cylinder head cover gasket
- 7. Exhaust gas recirculation pipe
- 8. Oxygen sensor
- 9. Heat shield fixing screw
- 10. Heat shield
- 11. Thermostat fixing screw
- 12. Thermostat
- 13. Thermostat seal
- 14. Camshaft position sensor
- 15. Camshaft sprocket mounting screw
- 16. Washer
- 17. Camshaft sealing ring
- 18. Pin
- 19. Coolant temperature sensor
- 20. The screw of fastening of a forward cover of the bearing of a camshaft
- 21. Camshaft bearing front cover
- 22. Camshaft bearing cap
- 23. Camshaft
- 24. Cylinder head screw
- 25. Washer
- 26. cylinder head
- 27. Intake manifold assembly
- 28. Throttle control mechanism
- 29. Intake manifold gaskets
- 30. Exhaust manifold mounting nut
- 31. Exhaust manifold
- 32. Gasket exhaust manifold
- 33. Plug
- 34. Plug
- 35. Plug
- 36. Hydraulic valve clearance compensator
- 37. Valve retainers
- 38. Upper valve spring stop
- 39. Valve spring
- 40. Valve stem seal with lower spring stop
- 41. Exhaust valve
- 42. Inlet valve
- 43. Valve guide
- 44. Cylinder head gasket
Preparatory work
Before removing and disassembling the cylinder head, the following work must be performed:
- disconnect the negative battery cable;
- unscrew the fastening screws and remove the decorative engine cover;
- disconnect the breather from the cylinder head cover;
- disconnect the crankcase ventilation pipe from the cylinder head cover;
- disconnect the camshaft position sensor connector (SMR);
- disconnect the vacuum pipes;
- disconnect the ignition wires from the spark plugs (see fig. Т250 3.027);
- unscrew the fastening screws and remove the cylinder head cover;
- remove the cylinder head cover gasket;
- carry out the operation of reducing the pressure in the fuel system. To do this, let the engine run for 10 seconds with the fuel pump off. To turn off the fuel pump, remove the fuse;
- drain coolant;
- disconnect the breather from the cylinder head cover;
- disconnect the intake air temperature sensor connector (IAT);
- disconnect the air supply pipe from the throttle body;
- unscrew the fastening screws and remove the air filter;
- disconnect the A/C pressure sensor connector (ACP);
- disconnect the idle air control valve connector (IAC);
- disconnect the throttle position sensor connector (TPS);
- disconnect the cable from the throttle and from the intake manifold;
- disconnect the engine coolant inlet / outlet hose from the throttle body;
- disconnect the intake manifold pressure sensor (IDA);
- disconnect the brake booster vacuum hose;
- unplug variable geometry induction solenoid connector (VGIS);
- disconnect the variable geometry induction solenoid vacuum reservoir hose (VGIS);
- disconnect the camshaft position sensor connector (SMR);
- disconnect the fuel injector harness connectors;
- disconnect the fuel line;
- unscrew the nut and remove the bracket for fastening the pressure hose of the power steering;
- remove the power steering pressure hose;
- remove the alternator adjusting nut;
- disconnect the EGR valve connector (EGR);
- disconnect the electronic ignition coil connector;
- disconnect the front connector of the oxygen heating sensor;
- disconnect the front connector of the oxygen heating sensor;
- remove the right front wheel;
- unscrew the bolts and remove the lower engine protection;
- remove the purge solenoid valve from the intake manifold support bracket;
- unscrew the upper and lower screws securing the intake manifold support bracket and remove it;
- disconnect coolant temperature sensor connector (EATING);
- unscrew the screws and remove the exhaust manifold heat shield;
- unscrew the nuts securing the catalytic converter from the exhaust manifold;
- remove the radiator hose from the thermostat;
- unscrew the fastening screws and remove the upper front cover of the timing belt (see fig. Т250 3.044);
- unscrew the fastening screw and remove the crankshaft pulley;
- unscrew the fastening screws and remove the lower front cover of the timing belt;
- remove the timing belt;
- unscrew the fastening screws and remove the automatic timing belt tensioner;
- unscrew the mounting screws and remove the camshaft position sensor (SMR);
- unscrew the fastening screws and remove the timing belt idler pulley (see fig. Т250 3.049);
- unscrew the fastening screws and remove the rear timing belt cover (see fig. T250 3.050);
- disconnect the heater outlet hose from the coolant pipe (see fig. Т250 3.051).
Notes on removing the intake and exhaust manifold
Remove the intake and exhaust manifold nuts in the order shown in the figure.
Notes on cylinder head removal
The cylinder head must be removed complete with intake and exhaust manifolds. The cylinder head mounting screws should be removed in the order shown in the figure.
Notes on removing the camshaft bearing caps
The screws securing the camshaft covers should be removed in the order shown in the figure.
