Yaris 2007

Cylinder Head

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Removal & Installation



  1. Drain the engine oil.
  2.  
  3. Drain and recycle the engine coolant.
  4.  
  5. Properly relieve the fuel system pressure.
  6.  
  7. Remove the camshaft assembly. Refer to Camshaft in this section.
  8.  
  9. Remove the timing chain sprockets and cover. Refer to Timing Chain And Sprockets in this section.
  10.  
  11. Remove the intake manifold. Refer to Intake Manifold in this section.
  12.  
  13. Remove the exhaust manifold.
  14.  
  15. Remove the cylinder head. Using several steps, uniformly loosen and remove the 10 cylinder head bolts with an 8 mm bi-hexagon wrench in the sequence shown in the illustration. Remove the 10 plate washers.
    NOTE
    Do not drop the washers into the cylinder head. Head warpage or cracking could result from removing the bolts in the wrong order.



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    Fig. Cylinder head removal sequence

  16.  
  17. Remove the cylinder head gasket.

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    Fig. Cylinder head and related components-1 of 3



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    Fig. Cylinder head and related components-2 of 3



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    Fig. Cylinder head and related components-3 of 3

  18.  

To install:

  1. Place a new cylinder head gasket on the cylinder block with the Lot No. stamp facing upward.
    NOTE
    Remove any oil from the contact surfaces. Check the mounting orientation of the cylinder head gasket. Place the cylinder head on the cylinder head gently in order not to damage the gasket.

  2.  
  3. Install cylinder head sub-assembly:
    1. Apply a light coat of engine oil to the threads of the cylinder head bolts.
    2.  
    3. Using several steps, install and tighten the 10 cylinder head bolts and plate washers uniformly to 22 ft. lbs. (29 Nm) with an 8 mm bi-hexagon wrench, in the sequence shown in the illustration.

      Click image to see an enlarged view

      Fig. Cylinder head tightening sequence-First pass

    4.  

  4.  
  5. Mark the front of the cylinder head bolt with paint.
  6.  
  7. Retighten the cylinder head bolts 90° and then an additional by 90° as shown in the illustration.

    Click image to see an enlarged view

    Fig. Cylinder head tightening sequence-Second pass

  8.  
  9. Check that the paint mark is now at a 180°angle from the front.
  10.  
  11. Apply a continuous bead of seal packing (Diameter 4.5 to 5.5 mm (0.177 to 0.217 in.)) as shown in the illustration. Seal Packing: Toyota Genuine Seal Packing Black, Three Bond 1207B or Equivalent.
    NOTE
    Remove any oil from the contact surfaces. Install the oil pump assembly within 3 minutes and tighten the bolts within 15 minutes of applying the seal packing.

  12.  
  13. To complete installation, reverse the remaining removal procedure.
  14.  

 
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