LS400 1990-1997

Oil Pan

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Removal & Installation



Specific to:

Lexus LS400 1993-1994

  1. Raise the support the front end on jackstands.
  2.  
  3. Remove the engine undercovers.
  4.  
  5. Drain the engine oil.
  6.  
  7. Disconnect the power steering oil cooler line from the oil pan.
  8.  
  9. Remove the mounting nuts and bolts. Use a gasket cutter (tool no. 09032-00100 or equivalent) to cut the sealant holding the lower oil pan to the upper oil pan. Remove the lower oil pan.
    NOTE
    Use great care to avoid damaging the contact surfaces or flanges with the gasket cutter.

  10.  

To install:

  1. Using a gasket scraper and a wire brush, remove all the old packing material from the lower and upper oil pan surfaces. Wipe the oil pan interior with a rag. Clean the contact surfaces with a non-residue solvent. Do not use a solvent which will affect the painted surface.
  2.  
  3. Apply a thin, 1 / 8 inch (3-4mm) bead of seal packing or form-in-place gasket (FIPG) or equivalent to the oil pan. To ensure the proper size bead, cut the nozzle on the tube a bit smaller than the desired bead.
    NOTE
    Avoid applying too much sealant to the oil pan. The oil pan must be assembled to the block 3-5 minutes after the sealant is applied. If not, the sealant must be removed and re-applied.



    Click image to see an enlarged view

    Fig. Sealant application - 1993-94 LS400

  4.  
  5. Hold the oil pan in place and install the bolts and nuts. Torque the nuts and bolts to 69 inch lbs. (8 Nm).
  6.  
  7. Reattach the oil cooler lines to the pan.
  8.  
  9. Fill the engine with oil to the proper level.
  10.  
  11. Start the engine and check for leaks.
  12.  
  13. Install the engine cover or covers.
  14.  
  15. Recheck the engine oil level.
  16.  

Specific to:

Lexus LS400 1995-1997

  1. Remove the engine/trans assembly. Separate the transmission from the engine.
  2.  
  3. With the engine on a stand, remove the timing belt, the idler pulleys and the crankshaft timing pulley.
  4.  
  5. Remove the oil dipstick and guide.
  6.  
  7. Disconnect the oil level sensor lead.
  8.  
  9. Remove the four bolts and lift off the oil level sensor. Be careful not to drop this sensor.
  10.  
  11. Remove the oil filter and the bracket assembly by removing the stud bolt and two nuts.
  12.  
  13. Disconnect the engine crankshaft position sensor connector. Remove the sensor by removing the bolt.
  14.  
  15. Remove the 12 bolts and 2 nuts to the No. 2 oil pan. Use a gasket cutting tool to separate the No. 2 (lower) oil pan. Be careful not to damage the No. 1 pan while performing this procedure.
  16.  
  17. Remove the two bolts and three nuts and drop down the baffle plate.
  18.  
  19. Remove the oil strainer by removing the bolts and nuts.
  20.  
  21. Remove the bolts and then carefully pry off the No. 1 oil pan. There are slots for inserting the prybar.
  22.  

To install:

  1. Scrape off any old sealant and then install the No. 1 pan. Apply sealant to the pan mating surface with a 1 / 8 inch (3-4mm) bead.
  2.  
  3. Torque the bolts for the No. 1 oil pan as follows:

    10mm head to 66 inch lbs. (8 Nm)
     
    12mm head to 21 ft. lbs. (28 Nm)
     

  4.  
  5. Install the oil strainer by installing the bolts and nuts. Tighten the bolts to 66 inch lbs. (8 Nm).
  6.  
  7. Install the baffle plate and tighten the bolts and nuts to 66 inch lbs. (8 Nm).
  8.  
  9. Install the No. 2 pan in the same manner as the No. 1 oil pan and tighten the bolts to 66 inch lbs. (8 Nm). Make sure the bolts are 14mm in length.
  10.  
  11. Install the engine crankshaft position sensor. Tighten the bolt to 56 inch lbs. (6 Nm). Connect the crankshaft position sensor connector.
  12.  
  13. Place a new O-ring in position on the oil filter bracket. Install the bracket and tighten the bolt and nuts to 13 ft. lbs. (18 Nm). Connect the wiring to the pressure switch.
  14.  
  15. Using a new gasket, install the oil level sensor and tighten the four bolts to 48 inch lbs. (5 Nm).
  16.  
  17. Install the dipstick and guide, the timing belt pulleys and the timing belt components.
  18.  
  19. Connect the transaxle to the engine.
  20.  
  21. Install the engine and transaxle, refill all fluids and road test the vehicle.
  22.  

 
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