Cylinder Head Removal

NOTE:

Use fender covers to avoid damaging painted surfaces.
To avoid damaging the wiring and terminals, unplug the wiring connectors carefully while holding the connector portion.
Connect the HDS to the DLC (see step 2 under HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM) ), and monitor the ECT SENSOR 1. 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 any other wiring or hoses, or interfere with any other parts.

Relieve the fuel pressure (see FUEL PRESSURE RELIEVING ).
Remove the air intake duct (see step 1 under FRONT BULKHEAD COVER REPLACEMENT ).
Do the battery removal procedure (see BATTERY REMOVAL AND INSTALLATION ).
Drain the engine coolant (see COOLANT CHECK ).
Remove the drive belt (see DRIVE BELT REPLACEMENT ).
Remove the power steering pump (A) and the bolt (B) securing the power steering hose bracket (C).

Fig 1: Identifying Power Steering Pump, Bolt And Power Steering Hose Bracket
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the alternator (see ALTERNATOR REMOVAL AND INSTALLATION ).
Remove the timing belt (see TIMING BELT REMOVAL ).
Remove the intake manifold (see REMOVAL ).
Remove the six ignition coils (see IGNITION COIL AND SPARK PLUG REMOVAL/INSTALLATION ).
Disconnect the following engine wire harness connectors, and remove the wire harness clamps from the cylinder head:
- Six injector connectors
- ECT sensor 1 connector
- Front rocker arm oil pressure switch connector
- Rear rocker arm oil pressure switch connector
- CMP sensor connector
- Front A/F sensor 1 connector
- Rear A/F sensor 1 connector
- Front secondary HO2S connector
- Rear secondary HO2S connector
- Rocker arm oil control solenoid A (Bank 1) connector
- Rocker arm oil control solenoid A (Bank 2) connector
- Rocker arm oil control solenoid B (Bank 1) connector
- Knock sensor connector
Remove the front warm up TWC (see WARM UP TWC REMOVAL/INSTALLATION ) and the rear warm up TWC (see REAR WU-TWC (BANK 1) ).
Remove the quick-connect fitting cover (A), then disconnect the fuel feed hose (B) (see FUEL LINE/QUICK-CONNECT FITTING REMOVAL ).

Fig 2: Identifying Quick-Connect Fitting Cover And Fuel Feed Hose
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the connector bracket (A) from the front cylinder head.

Fig 3: Identifying Connector Bracket
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the harness clamp bracket (A) from the rear cylinder head.

Fig 4: Identifying Harness Clamp Bracket
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the injector bases (see INJECTOR BASE REMOVAL AND INSTALLATION ).
Remove the water passage (see WATER PASSAGE REPLACEMENT )
Remove the camshaft pulleys (A) and the back covers (B).
FRONT

Fig 5: Identifying Camshaft Pulleys And Back Covers (Front)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

REAR

Fig 6: Identifying Camshaft Pulleys And Back Covers (Rear)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the cylinder head covers (see CYLINDER HEAD COVER REMOVAL ).
Remove the cylinder head bolts. To prevent warpage, loosen the bolts in sequence 1/3 turn at a time; repeat the sequence until all the bolts are loosened.
FRONT

Fig 7: Identifying Cylinder Head Bolt Tightening Sequence (Front)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

REAR

Fig 8: Identifying Cylinder Head Bolt Tightening Sequence (Rear)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the cylinder heads.