Diesel Data: Automotive Repair

Cylinder Head Removal

1. Negative (-) battery cable.
2. Drain engine coolant. See Cooling System.
3. Raise and suitably support vehicle.
4. Six bolts and right-side engine splash shield from vehicle.
5. Lower vehicle.





6. Loosen lock nut and adjusting nut and Remove accelerator cable from bracket and Throttle Body (TB).
7. Loosen lock nut and adjusting nut and Remove throttle cable from bracket and TB (automatic transaxle equipped vehicles).
8. Vacuum hose from the Evaporative Emissions (EVAP) canister.
9. Intake Air Temperature (IAT) sensor electrical connector from the air cleaner cap.
10. Loosen air cleaner (ACL) hose clamp bolt.
11. Four clips and ACL cover.
12. Generator. See Starting and Charging.
13. Distributor. See Powertrain Management.
14. Front exhaust pipe:
a. Two bolts from exhaust pipe support
b. Two bolts from front exhaust pipe-to-three Way Catalytic Converter (TWC) mating flange.
c. Electrical connector from oxygen sensor (02S1) at front exhaust pipe.
d. Two nuts from front exhaust pipe-to-exhaust manifold mating flange and front exhaust pipe from vehicle.
15. Exhaust manifold:





a. Five bolts and upper heat insulator.





b. Three bolts and exhaust manifold brace.





c. Five nuts and exhaust manifold from vehicle.
16. Upper radiator hose from engine coolant outlet housing.
17. Two bolts and engine coolant outlet housing from vehicle.





18. Thermostat housing.
a. Engine Coolant Temperature (ECT) sending unit electrical connector.
b. ECT sensor electrical connector.
c. Idle Air Control (IAC) valve electrical
d. Lower radiator hose from the thermostat housing.
e. Engine coolant control valve inlet and outlet hoses from thermostat housing.
f. EVAP Thermal Vacuum Valve (TVV) vacuum hoses from thermostat housing.
g. Two engine coolant bypass hoses from thermostat housing.
h. One bolt, two nuts and thermostat housing from vehicle.
19. One bolt and left-side engine hanger from engine.
20. Ground strap electrical connector.
21. Manifold Absolute Pressure (MAP) sensor electrical connector.
22. A/C triple pressure switch electrical connector (if equipped).
23. Engine wire harness from right-side fender.
24. The following hoses from the intake chamber:
- Vacuum sensor hose from fuel filter.
- Brake booster vacuum hose.
- Air Conditioning (A/C) vacuum hoses from A/C Solenoid Vacuum (A/C SV) valve (if equipped).
- Air hose from air pipe.
25. A/C SV valve electrical connector.
26. Exhaust Gas Re-circulation Solenoid Vacuum (EGR SV) valve and vacuum modulator.
a. EGR SV valve and EGR temperature sensor electrical connectors.
b. Disconnect vacuum hoses from the Throttle Body (TB)
c. Hose from EGR SV valve pipe.
d. One bolt and EGR SV valve, vacuum modulator and vacuum hose assembly from vehicle.
27. Engine wire clamp.
28. Two bolts and intake manifold brace.
29. Fuel return hose from pressure regulator.





30. Fuel inlet hose clamp bolt, one bolt, one nut and air pipe from intake manifold.





31. Two nuts, EGR valve and gasket from vehicle.
32. TB from intake manifold.
a. Two bolts and accelerator bracket.
b. Throttle Position (TP) sensor electrical connector.





c. Two bolts, two nuts and TB with gasket.
33. Two hose clamps and two Positive Crankcase Ventilation (PCV) hoses from cylinder head cover.
34. Intake chamber cover.
a. Vacuum hose from pressure regulator.





b. Three bolts, two nuts and intake chamber cover with gasket.
35. Fuel rail with injectors.





a. Union bolt, two gaskets and fuel inlet pipe from fuel rail.
b. Injector electrical connectors.

CAUTION: Be careful not to drop the injectors when removing fuel rail. Damage to the injectors could result.





c. Two bolts and fuel rail with injectors attached.
d. Injectors from fuel rail.
e. O-ring and grommet from injectors.
f. Four insulators and two spacers from cylinder head.
36. Engine wire harness.
a. A/C compressor electrical connector (if equipped).
b. Oil pressure switch electrical connector.
c. Crankshaft position sensor electrical connector.





d. Two bolts and engine wire cover from engine.
e. Fan thermostat electrical connector.
f. One bolt and engine wire ground strap.
g. One bolt, two nuts and engine wire harness retainer.
37. Seven bolts, ground strap, four nuts and intake manifold with two gaskets.
38. Engine mount from vehicle.
a. Unclip cruise control actuator cover and Remove from vehicle (if equipped).
b. Three bolts and set cruise control actuator aside (if equipped).
c. Three bolts and cruise control actuator bracket from vehicle (if equipped).
d. Support engine using a floor jack.
e. Two nuts from engine mount studs.





f. One bolt, one screw and two-piece A/C pipe bracket from engine mount (if equipped).





g. One bolt, one nut and engine mount reinforcement bracket from vehicle (if equipped).
h. One bolt and rubber insulator from engine mount.
i. Four bolts and engine mount from vehicle.

CAUTION: It may be necessary to lower engine to gain clearance for engine mount removal. Be careful not to bend A/C pipe (if equipped) too much or a leak may develop in the A/C system.

39. Timing belt.
40. Three bolts and generator mounting bracket from vehicle.
41. Oil level indicator from guide tube.
42. Unclip crankshaft position sensor electrical connector on guide tube.
43. One bolt and guide tube from vehicle.
44. Loosen hose clamp on engine coolant inlet pipe.





45. Two nuts and engine coolant inlet pipe from vehicle.
46. Intake and exhaust camshafts.

CAUTION: Cylinder head warping or cracking could result from incorrect bolt removal.





47. Cylinder head bolts in sequence shown.
48. Cylinder head from dowels on cylinder block and place on wooden blocks on workbench.

CAUTION: When prying cylinder head from block, take care not to damage mating surfaces with pry bar.





49. If head is difficult to lift off, gently pry with a bar between the cylinder head and cylinder block projection.