Sienna 1998-1999

Oil Pan

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Removal & Installation



  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Remove or disconnect the following:

    Right front wheel
     
    Fender apron seal
     
    Engine undercover
     

  4.  
  5. Drain the engine oil from the engine.
  6.  
  7. Remove or disconnect the following:

    Front exhaust pipe
     
    Front exhaust pipe bracket from the No. 1 oil pan
     
    Flywheel housing undercover
     
    10 bolts and 2 nuts to the No. 2 oil pan
     

  8.  
  9. Insert the blade of the Oil Pan Seal Cutting tool 09032-00100 between the No. 1 and No. 2 oil pans. Clean the surfaces of the oil pans.
  10.  
  11. Remove or disconnect the following:

    3 oil strainer nuts and gasket
     

  12.  
  13. Remove the No. 1 oil pan, as follows:
    NOTE
    Make a note of the position of the each bolt. When replacing the bolts into the oil pan, place each bolt in the position from which it was removed.


    NOTE
    Be careful not to damage the contact surfaces.



    2 bolts and the flywheel housing undercover
     
    17 bolts and 2 nuts to the No. 1 oil pan
     



    Oil pan, by prying the portions between the cylinder block and the oil pan
     



    Baffle plate from the No. 1 oil pan
     

  14.  

To install:

  1. Clean all mating surfaces of the oil pans.
  2.  
  3. Install the baffle plate to the No. 1 oil pan and tighten to 69 inch lbs. (8 Nm).
  4.  
  5. Install the No. 1 oil pan, as follows:
    1. Using a non residue solvent, clean both sealing surfaces to the oil pan.
    2.  
    3. Apply liquid sealant to the oil pan and engine block.
    4.  
    5. Install the oil pan with the 17 bolts and 2 nuts. Uniformly tighten the bolts and nuts in several passes.
    6.  
    7. Tighten the No. 1 oil pan bolts, as follows:

      10mm head bolt: 69 inch lbs. (8 Nm)
       
      12mm head bolt: 14 ft. lbs. (20 Nm)
       
      14mm head bolt: 27 ft. lbs. (37 Nm)
       

    8.  
    9. Install the flywheel housing undercover with the 2 bolts. Tighten the bolts to 69 inch lbs. (8 Nm).
    10.  

  6.  
  7. Install the oil strainer with the 3 nuts. Tighten the nuts to 69 inch lbs. (8 Nm).
  8.  
  9. Install the No. 2 oil pan, as follows:
    1. Using a non residue solvent, clean both sealing surfaces to the oil pan.
    2.  
    3. Apply liquid sealant to the oil pan and engine block.
    4.  
    5. Install the No. 2 oil pan with the 10 bolts and 2 nuts. Uniformly tighten the bolts and nuts in several passes. Tighten the bolts to 69 inch lbs. (8 Nm).
    6.  

  10.  
  11. Install or connect the following:

    Flywheel housing undercover
     
    Front exhaust pipe bracket to the No. 1 oil pan. Tighten the bolts to 15 ft. lbs. (21 Nm).
     

  12.  
  13. Install the front exhaust pipe, as follows:

    Temporarily install the 3 new gaskets and the front exhaust pipe with the 2 bolts and 6 nuts
     
    Tighten the 4 exhaust manifolds-to-front exhaust pipe nuts to 46 ft. lbs. (62 Nm).
     
    Tighten the both front exhaust pipe-to-center exhaust pipe nuts/bolts to 41 ft. lbs. (56 Nm).
     
    Bracket. Tighten both bolts to 14 ft. lbs. (19 Nm).
     
    Support stay. Tighten both bolts to 22 ft. lbs. (29 Nm).
     

  14.  
  15. Install or connect the following:

    Engine undercover
     
    Right fender apron seal
     
    Right front wheel
     

  16.  
  17. Fill the engine with oil.
  18.  
  19. Start the engine and check for leaks.
  20.  

 
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