Cylinder Head Removal
Cylinder Head RemovalNOTE:
^ Use fender covers to avoid damaging painted surfaces.
^ To avoid damaging the wires and terminals, unplug the wiring connectors carefully while holding the connector portion.
^ To avoid damaging the cylinder head, wait until the engine coolant temperature drops below 100°F (38°C) before loosening the cylinder head bolts.
^ Mark all wiring and hoses to avoid misconnection. Also, be sure that they do not contact other wiring or hoses, or interfere with other parts.
1. Make sure you have the anti-theft code for the radio, then write down the audio presets.
2. Relieve fuel pressure.
3. Disconnect the negative cable from the battery first, then disconnect the positive cable.
4. Drain the engine coolant.
5. Drain the engine oil.
6. 2000-2005 models: Disconnect the air hose (A) and breather pipe (B), then remove the air cleaner housing cover (C) and air cleaner assembly (D).
7. 2006 model: Disconnect the intake air temperature (IAT) sensor connector (A) and breather pipe (B), remove the manifold absolute pressure (MAP) sensor harness (C) from the holder, then remove the air cleaner housing cover (D) and air cleaner assembly (E).
8. 2000-2005 models: Disconnect the air control solenoid valve connector (A) and vacuum hoses (B), remove the harness clamps (C), then remove the intake air cleaner housing (D).
9. 2006 model: Remove the IAT sensor harness clamps (A), the remove the intake air cleaner housing (B).
10. Remove the drive belt.
11. 2000-2005 models: Remove the throttle cable.
12. 2000-2005 models: Remove the fuel feed hose (A), fuel return hose (B), and brake booster vacuum hose (C).
13. 2006 model: Remove the intake manifold cover.
14. 2006 model: Remove the quick-connect fitting cover (A), then disconnect the fuel feed hose (B) and brake booster vacuum hose (C).
15. Disconnect the evaporative emission (EVAP) canister hose.
16. 2000-2005 models: Remove the bolt (A) securing the intake manifold bracket, and remove the air hose (B).
17. 2006 model: Remove the bolt (A) securing the intake manifold bracket.
18. Remove the water outlet cover.
19. Remove the engine wire harness connectors and wire harness clamps from the cylinder head and intake manifold.
^ Four fuel injector connectors
^ Intake air temperature (IAT) sensor connector (2000-2005 models)
^ Idle air control (IAC) valve connector (2000-2005 models)
^ Throttle position (TP) sensor connector (2000-2005 models)
^ Throttle body connector (2006 model)
^ Manifold absolute pressure (MAP) sensor connector
^ Primary heated oxygen sensor (primary H02S) connector (2000-2005 models)
^ A/F sensor connector (2006 model)
^ Engine coolant temperature (ECT) sensor connector (2000-2005 models)
^ Engine coolant temperature (ECT) sensor 1 connector (2006 model)
^ Rocker arm oil control solenoid (VTEC solenoid valve) connector
^ Rocker arm oil pressure switch (VTEC oil pressure switch) connector
^ Crankshaft position (CKP) sensor connector
20. 2000-2005 models: Remove two bolts (A) securing the intake manifold bracket, and remove the water bypass hose (B).
21. 2006 model: Remove the water bypass hose (A), remove the EVAP hose (B) and its bracket (C), remove wire harness clamp (D), then remove the intake manifold bracket (E).
22. Remove the four bolts securing the exhaust manifold cover.
23. Remove the three bolts (A), and loosen the bolt (B), then remove the heat shield (C).
24. Remove the exhaust manifold cover, then remove the exhaust manifold bracket (A) and the exhaust manifold (B).
25. 2000-2005 models: Remove the injectors.
26. Remove the intake manifold stay (A) and the intake manifold (B).
27. Remove the cylinder head cover.
28. Set the No. 1 piston at top dead center (TDC). The TDC marks (A) on the cam chain sprocket should align with the cylinder head surface.
29. Remove the end cover (A) and nozzle (B) from the cam chain auto-tensioner.
30. Thread a nut (A) onto a 5 x 0.8 mm bolt that is at least 40 mm long (B), then thread the bolt into the maintenance hole in the cam chain auto-tensioner.
31. Turn the bolt clockwise to compress the cam chain auto-tensioner, and lock the bolt with the nut.
32. Remove the cam chain auto-tensioner.
33. Loosen the rocker arm adjusting screws (A).
34. Remove the camshaft holders and camshafts. To prevent damaging the camshafts, unscrew the camshaft holder bolts two turns at a time, in a crisscross pattern.
35. Insert the bolts (A) into the rocker shaft holder, then remove the rocker arm assembly (B).
36. Remove the idler gear/cam chain sprocket assembly, idler gear collar, and washer.
37. Remove the cylinder head bolts. To prevent warpage, unscrew the bolts in sequence 1/3 turn at a time; repeat the sequence until all the bolts are loose.
38. Remove the cylinder head.