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Cylinder Head Removal

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • 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.
  • Connect the HDS to the DLC, 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.
  1. Relieve the fuel pressure (see FUEL PRESSURE RELIEVING ).
  2. Do the battery terminal disconnection procedure (see USING THE GR8 BATTERY DIAGNOSTIC STATION ).
  3. Drain the engine coolant (see COOLANT CHECK ).
  4. Remove the alternator (see TENSIONER PULLEY REPLACEMENT ).
  5. Remove the intake manifold (see REMOVAL ).
  6. Remove the six ignition coils (see IGNITION COIL AND SPARK PLUG REMOVAL/INSTALLATION ).
  7. Remove the timing belt (see TIMING BELT REMOVAL  ).
  8. Disconnect the following engine wire harness connectors, and remove the wire harness clamps from the cylinder head:
    • Six injector connectors
    • Knock sensor connector
    • ECT sensor 1 connector
    • Engine mount control solenoid valve connector
    • EGR valve connector
    • CMP sensor connector
    • Rocker arm oil control solenoid connector
    • Rocker arm oil pressure switch connector
    • Two A/F sensor connectors
    • Two secondary HO2S connectors
  9. Remove the front warm up TWC (see WARM UP TWC REMOVAL/INSTALLATION ) and the rear warm up TWC (see WARM UP TWC REMOVAL/INSTALLATION ).
  10. Remove the quick-connect fitting cover (A), then disconnect the fuel feed hose (B) (see FUEL LINE/QUICK-CONNECT FITTING REMOVAL ).
    Fig 1: Identifying Quick-Connect Fitting Cover And Fuel Feed Hose
    G08052187Courtesy of AMERICAN HONDA MOTOR CO., INC.
  11. Remove the connector bracket (A) from the front cylinder head.
    Fig 2: Identifying Front Cylinder Head Connector Bracket
    G08052188Courtesy of AMERICAN HONDA MOTOR CO., INC.
  12. Remove the mount control solenoid valve bracket (A) from the rear cylinder head.
    Fig 3: Locating Rear Cylinder Head Mount Control Solenoid Valve Bracket
    G08052189Courtesy of AMERICAN HONDA MOTOR CO., INC.
  13. Remove the injector bases (see INJECTOR BASE REMOVAL AND INSTALLATION ).
  14. Remove the water passage (see WATER PASSAGE REPLACEMENT ).
  15. Remove the camshaft pulleys (A) and the back covers (B).

    FRONT 

    Fig 4: Identifying Camshaft Pulleys And Back Covers With Mounting Bolts (Front)
    G08052190Courtesy of AMERICAN HONDA MOTOR CO., INC.

    REAR 

    Fig 5: Identifying Camshaft Pulleys And Back Covers With Mounting Bolts (Rear)
    G08052191Courtesy of AMERICAN HONDA MOTOR CO., INC.
  16. Remove the cylinder head covers (see CYLINDER HEAD COVER REMOVAL  ).
  17. 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 6: Identifying Front Cylinder Head Bolts Loosening Sequence
    G08052192Courtesy of AMERICAN HONDA MOTOR CO., INC.

    REAR 

    Fig 7: Identifying Rear Cylinder Head Bolts Loosening Sequence
    G08052193Courtesy of AMERICAN HONDA MOTOR CO., INC.
  18. Remove the cylinder heads.
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