Toyota Pick-ups, Land Cruiser, and 4 Runner 1997-00

Cylinder Head (Valve) Cover

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REMOVAL & INSTALLATION



All of the engines covered by the manual are of the Over Head Camshaft (OHC) configuration. The covering over the camshafts is variously called the valve cover, cam cover, rocker cover and cylinder head cover. In general, cylinder head cover is most accurate and will be used most often in this guide.

2RZ-FE and 3RZ-FE Engines
  1. On manual transmissions, disconnect the accelerator cable from the throttle body.
  2.  
  3. On automatics, disconnect the accelerator and throttle cables from the throttle body.
  4.  
  5. On cruise control, remove the actuator cover, then disconnect the cruise control cable from the actuator.
  6.  
  7. Disconnect the three wire clamps for the engine harness.
  8.  
  9. Detach the Mass Air Flow (MAF) meter and Intake Air Temperature (IAT) sensor connections.
  10.  
  11. On the 3RZ-FE engine, disconnect the air hose from the air cleaner cap, then loosen the air cleaner hose clamp.
  12.  
  13. Loosen the 4 clips, and remove the air cleaner cover, Mass Air Flow (MAF) meter and resonator sensor.
  14.  
  15. Remove the air intake sensor by disconnecting the air hose for the Idle Air Control (IAC) valve.
    1. Remove the vacuum sensing hose and wire clamp for the engine wire.
    2.  
    3. Loosen the hose clamp, and remove the bolts retaining the air intake connector.
    4.  

  16.  
  17. Remove the PCV hoses.
  18.  
  19. Tag and disconnect the spark plug wires.
  20.  
  21. Disconnect the following wires:

    A/C connector if equipped
     
    Oil pressure sensor wire
     
    Engine coolant temperature sensor
     
    Distributor wire
     
    4 engine wire clamps and engine wire
     

  22.  
  23. Remove the cylinder head cover bolts, seal washers, cover and gasket.
  24.  



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Fig. On 2RZ-FE and 3RZ-FE engines, 10 bolts secure the cylinder head cover

To install:

  1. Clean the mating areas well.
  2.  
  3. Install the gasket on the cover, then install the cover to the cylinder head. Be sure to have new seal washers, then install the bolts,
  4.  
  5. Attach the wires removed previously.
  6.  
  7. Install the spark plug wires.
  8.  
  9. Reattach the PCV hoses.
  10.  
  11. Install the air intake components.
  12.  
  13. Start the engine and check for leaks. Check and add fluids as required.
  14.  

5VZ-FE Engine
  1. Disconnect the accelerator and throttle cables from the throttle linkage.
  2.  
  3. Remove the air cleaner cover, air flow meter, and air duct assembly. It will be necessary to disconnect the wiring to the meter and unbolt the assembly, prior to removal.
  4.  
  5. Loosen and remove the cylinder head cover bolts.
  6.  
  7. Remove the cylinder head covers, work on one at a time to avoid confusion.
  8.  



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Fig. The cylinder head covers are secured to the heads by the bolts shown on 5VZ-FE engines



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Fig. Use a ratchet, an extension, and a socket to remove the cylinder head cover bolts



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Fig. Lift off the cylinder head cover



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Fig. Cylinder head cover bolt locations



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Fig. Remove the gasket from the groove in the cylinder head cover

To install:

  1. Clean the mating areas on the cover and cylinder head.
  2.  
  3. Install the gasket to the head and seal washers. Attach the cover with the mounting bolts. Tighten until snug.
  4.  
  5. Install the air flow meter, air duct, and the air cleaner cover.
  6.  
  7. Connect the accelerator and throttle cables to the throttle linkage.
  8.  
  9. Start the engine and check for leaks. Check and add fluids as required.
  10.  

1FZ-FE Engine
  1. Drain the cooling system.
  2.  
  3. Remove the throttle body.
  4.  
  5. Disconnect the engine wiring harness and heater control valve from the cowl panel. A ground strap holds the harness in place.
  6.  



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Fig. Remove the bolts securing the harness ground strap and heater valve to the cowl panel1FZ-FE engine



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Fig. The cylinder head cover is secured with 13 bolts1FZ-FE engine

  1. Tag and disconnect the spark plug wires.
  2.  
  3. Remove the cylinder head cover bolts, gasket and the cover.
  4.  

To install:

  1. Clean the cylinder head cover and mating areas on the engine.
  2.  
  3. Install a new gasket into the groove of the cover.
  4.  
  5. Install and tighten the 13 bolts evenly.
  6.  
  7. Attach the spark plug wires to their proper locations.
  8.  
  9. Bolt the engine harness to the cowl. Attach the heater control valve.
  10.  
  11. Install the throttle body with a new gasket.
  12.  
  13. Fill the cooling system.
  14.  
  15. Start the engine and check for leaks. Check and add fluids as required.
  16.  

2UZ-FE Engine


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Fig. Make sure the semi-circular seal plugs are in place (arrows) and that FIPG sealer is applied at the places indicated2UZ-FE engine

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the four bolts retaining the ignition coils to the cylinder head cover and the spark plugs. Tag for identification, and then remove the coil assemblies.
  4.  
  5. On the left side (drivers side):
    1. The engine oil dipstick may interfere with cylinder head cover removal, so pull the dipstick out and set it aside.
    2.  
    3. Reposition the fuel lines and EVAP hoses as necessary. It shouldn't be necessary to disconnect them, just unclip from their retainers and reposition.
    4.  
    5. Disconnect the breather hose.
    6.  

  6.  
  7. On the right side (passengers side):
  8.  
  9. Disconnect the L-Shaped PCV breather hose.
  10.  
  11. Unclip the power steering vacuum switch hose that runs to the intake manifold plenum and reposition.
  12.  
  13. Remove the nine cylinder head cover bolts and carefully remove the cylinder head cover. Use care. The cover is aluminum. Light alloy parts can be easily damaged.
  14.  

To install:

  1. Clean all parts well. In addition to the cylinder head cover gaskets, Toyota uses small amounts of FIPG sealer in two spots at the camshaft drive end of the cylinder head next to the timing belt covers. Note the position of this sealer before cleaning it off since new sealer must be installed in the same locations. All of this old sealer must be removed. Use care not to gouge the aluminum sealing surfaces on either the head or the cylinder head cover. Note the semi-circular sealing plugs that are in the cylinder head on the end opposite the camshaft drive. These seals must be in good condition and properly installed or there will be a massive oil leak on startup.
  2.  
  3. Installation is the reverse of the removal procedure. Apply fresh FIPG material (sealer, Toyota #08826-00080, or equivalent) at the places indicated. Verify that the semi-circular plugs are in place.
  4.  
  5. Install a new gasket to the cylinder head cover. The bolts also have seals under them and they must be in good condition and properly installed. Install the cylinder head cover and the bolts.
  6.  
  7. Torque the cylinder head cover bolts evenly in several passes to 53 inch lbs. (6 Nm).
  8.  

 
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