LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2014 >> IS 350 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Engine Mechanical System (2GR-FKS) - Service Information (2 Of 2)) >> Engine Unit >> Inspection [10/2017 - ] >> Procedure

Inspection [10/2017 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2024 Lexus IS 350, 2024 Lexus IS 300, 2023 Lexus IS 350, 2023 Lexus IS 300, and 2022 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY 
    1. Turn the roller by hand to check that it turns smoothly.

      If the roller does not turn smoothly, replace the No. 1 valve rocker arm sub-assembly.

  2. INSPECT VALVE LASH ADJUSTER ASSEMBLY 
    NOTE:
    • Keep the valve lash adjuster assembly free of dirt and foreign objects.
    • Only use clean engine oil.
    1. Place the valve lash adjuster assembly into a container filled with engine oil.
    2. Insert the tip of SST into the valve lash adjuster assembly plunger and use the tip to press down on the check ball inside the plunger.
      • SST: 09276-75010 
      GTY831225Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a CORRECT *b INCORRECT
      *c Tapered Path *d Plunger
      *e Low Pressure Chamber *f Check Ball
      *g High Pressure Chamber - -
    3. Squeeze SST and the valve lash adjuster assembly together to move the plunger up and down 5 to 6 times.
    4. Check the movement of the plunger and bleed air.

      OK

      Plunger moves up and down.

      NOTE:

      When bleeding air from the high-pressure chamber, make sure that the tip of SST is actually pressing the check ball as shown in the illustration. If the check ball is not pressed, air will not bleed.

    5. After bleeding air, remove SST. Then try to quickly and firmly press the plunger with your fingers.

      OK

      Plunger can be pressed 3 times.

      If the plunger can still be compressed after pressing it 3 times, replace the valve lash adjuster assembly with a new one.

  3. INSPECT CAMSHAFT 
    1. Inspect the camshaft runout.
      1. Place the camshaft on V-blocks.
      2. Using a dial indicator, measure the circle runout at the center journal.

        Maximum circle runout

        0.03 mm (0.00118 in.)

        If the runout is more than the maximum, replace the camshaft.

        HINT: 

        Check the oil clearance after replacing the camshaft.

    2. Inspect the cam lobes. (for intake and exhaust valve)
      GTY814119Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using a micrometer, measure the cam lobe height.

        Standard Cam Lobe Height

        Item Specified Condition
        Intake Side of Bank 1 44.3229 to 44.4229 mm (1.744 to 1.748 in.)
        Exhaust Side of Bank 1 44.4377 to 44.5377 mm (1.749 to 1.753 in.)
        Intake Side of Bank 2 44.3221 to 44.4221 mm (1.744 to 1.748 in.)
        Exhaust Side of Bank 2 44.4356 to 44.5356 mm (1.749 to 1.753 in.)

        Minimum Cam Lobe Height

        Item Specified Condition
        Intake Side of Bank 1 44.2229 mm (1.741 in.)
        Exhaust Side of Bank 1 44.3377 mm (1.746 in.)
        Intake Side of Bank 2 44.2221 mm (1.741 in.)
        Exhaust Side of Bank 2 44.3356 mm (1.745 in.)
    3. Inspect the cam lobes. (for fuel pump drive)
      GTY814118Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Using a micrometer, measure the cam lobe height.

        Standard Cam Lobe Height

        40.554 to 40.654 mm (1.597 to 1.601 in.)

        Minimum Cam Lobe Height

        40.454 mm (1.593 in.)

    4. Using a micrometer, measure the journal diameter. (for Exhaust Side of Bank 1)

      Standard Journal Diameter

      Item Specification
      No. 1 Journal 35.946 to 35.960 mm (1.4152 to 1.4157 in.)
      Other Journals 25.959 to 25.975 mm (1.0220 to 1.0226 in.)
    5. Using a micrometer, measure the journal diameter. (except Exhaust Side of Bank 1)

      Standard Journal Diameter

      Item Specification
      No. 1 Journal 35.946 to 35.960 mm (1.4152 to 1.4157 in.)
      No. 2, 3, 4 Journals 25.959 to 25.975 mm (1.0220 to 1.0226 in.)
      No. 5 Journal 25.969 to 25.985 mm (1.022 to 1.023 in.)

      If the journal diameter is not as specified, check the camshaft oil clearance.

  4. INSPECT CYLINDER HEAD SET BOLT 
    GTY782868Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Measurement Length
    1. Using a vernier caliper, measure the length of the cylinder head set bolt from the seat to the end.

      Standard length

      141.3 to 142.7 mm (5.56 to 5.62 in.)

      Maximum length

      143.7 mm (5.66 in.)

      If the length is more than the maximum, replace the cylinder head set bolt.

    2. Using a vernier caliper, measure the diameter of the elongated thread at the narrowest visible area.
      GTY791219Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Measuring Point
      *b 100 mm (3.93 in.)

      Standard diameter

      10.80 to 11.00 mm (0.425 to 0.433 in.)

      Minimum diameter

      10.70 mm (0.421 in.)

      If the diameter is less than the minimum, replace the cylinder head set bolt.

      HINT: 

      If a visual check reveals no excessively thin areas, check the center of the bolt (refer to illustration) and find the area that has the smallest diameter.

  5. INSPECT CHAIN SUB-ASSEMBLY 
    1. GTY739132Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Measurement Area

      Using a spring scale, pull the chain sub-assembly with a force of 147 N (15 kgf, 33 lbf) and measure the length of the chain using a vernier caliper.

      Maximum chain elongation

      136.7 mm (5.38 in.)

      HINT: 

      Perform the measurement at 3 random places. If a measurement is more than the maximum, replace the chain sub-assembly.

  6. INSPECT NO. 2 CHAIN SUB-ASSEMBLY 
    1. Using a spring scale, pull the No. 2 chain sub-assembly with a force of 147 N (15 kgf, 33 lbf) and measure the length of the No. 2 chain using a vernier caliper.

      Maximum chain elongation

      137.6 mm (5.42 in.)

      HINT: 

      Perform the measurement at 3 random places. If a measurement is more than the maximum, replace the No. 2 chain sub-assembly.

      GTY739132Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Measurement Area
  7. INSPECT CRANKSHAFT TIMING GEAR OR SPROCKET 
    1. Place the chain around the crankshaft timing gear or sprocket.
    2. Using a vernier caliper, measure the sprocket diameter with the chain.
      GTY145630Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Minimum sprocket diameter (with chain)

      61.4 mm (2.42 in.)

      HINT: 

      The vernier caliper must contact the chain rollers for the measurement.

      If the diameter is less than the minimum, replace the chain sub-assembly and crankshaft timing gear or sprocket.

  8. INSPECT IDLE SPROCKET ASSEMBLY 
    1. Place the chain around the idle sprocket assembly.
    2. Using a vernier caliper, measure the sprocket diameter with the chain.
      GTY136269Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Minimum sprocket diameter (with chain)

      61.4 mm (2.42 in.)

      HINT: 

      The vernier caliper must contact the chain rollers for the measurement.

      If the diameter is less than the minimum, replace the chain sub-assembly and idle sprocket assembly.

  9. INSPECT IDLE GEAR SHAFT OIL CLEARANCE 
    1. Using a micrometer, measure the No. 1 idle gear shaft diameter.

      Standard idle gear shaft diameter

      22.987 to 23.000 mm (0.905 to 0.906 in.)

    2. Using a caliper gauge, measure the inside diameter of the idle sprocket assembly.

      Standard idle gear inside diameter

      23.020 to 23.030 mm (0.906 to 0.907 in.)

    3. Subtract the No. 1 idle gear shaft diameter measurement from the idle sprocket assembly inside diameter measurement.

      Standard oil clearance

      0.020 to 0.043 mm (0.00078 to 0.00169 in.)

      Maximum oil clearance

      0.093 mm (0.00366 in.)

      If the thrust oil clearance is more than the maximum, replace the No. 1 idle gear shaft and idle sprocket assembly.

  10. INSPECT NO. 1 CHAIN TENSIONER ASSEMBLY 
    1. Move the stopper plate upward to release the lock. Push the plunger and check that it moves smoothly.
      GTY810217Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Moves Smoothly
      *b Plunger
      *c Stopper Plate

      If necessary, replace the No. 1 chain tensioner assembly.

  11. INSPECT NO. 2 CHAIN TENSIONER ASSEMBLY 
    1. Check that the plunger moves smoothly.
      GTY789681Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Moves Smoothly
      *b Depth
    2. Measure the depth of wear of the chain tensioner assembly.

      Maximum depth

      0.9 mm (0.0354 in.)

      If the depth is more than the maximum, replace the No. 2 chain tensioner assembly.

  12. INSPECT NO. 3 CHAIN TENSIONER ASSEMBLY 
    1. Check that the plunger moves smoothly.
      GTY809959Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Moves Smoothly
      *b Depth
    2. Measure the depth of wear of the chain tensioner.

      Maximum depth

      0.9 mm (0.0354 in.)

      If the depth is more than the maximum, replace the No. 3 chain tensioner assembly.

  13. INSPECT CHAIN TENSIONER SLIPPER 
    1. Measure the depth of wear of the chain tensioner slipper.
      GTY833182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Depth

      Maximum depth

      1.0 mm (0.0394 in.)

      If the depth is more than the maximum, replace the chain tensioner slipper.

  14. INSPECT NO. 1 CHAIN VIBRATION DAMPER 
    1. Measure the depth of wear of the No. 1 chain vibration damper.
      GTY777534Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Depth

      Maximum depth

      1.0 mm (0.0394 in.)

      If the depth is more than the maximum, replace the No. 1 chain vibration damper.

  15. INSPECT NO. 2 CHAIN VIBRATION DAMPER 
    1. Measure the depth of wear of the No. 2 chain vibration damper.
      GTY794024Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Depth

      Maximum depth

      1.0 mm (0.0394 in.)

      If the depth is more than the maximum, replace the No. 2 chain vibration damper.

  16. INSPECT CAMSHAFT OIL CLEARANCE 
    1. for Bank 1:
      1. Clean the camshaft bearing caps, camshaft housing sub-assembly RH and camshaft journals.
      2. Place the camshafts on the camshaft housing sub-assembly RH.
      3. Lay a strip of Plastigage across each camshaft journal.
        GTY799045Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Plastigage
      4. Install the camshaft bearing caps (See step  32).
        NOTE:

        Do not turn the camshaft.

      5. Remove the camshaft bearing caps (See step  51).
      6. Measure the Plastigage at its widest point.
        GTY804833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Plastigage
        *b No. 1 Journal
        *c No. 2 Journal
        *d No. 3 Journal
        *e No. 4 Journal
        *f No. 5 Journal

        Standard Oil Clearance

        Item Specified Condition
        No. 1 Journal 0.040 to 0.063 mm (0.00157 to 0.00248 in.)
        No. 2, 3, 4 Journals 0.025 to 0.062 mm (0.00098 to 0.00244 in.)
        No. 5 Journal 0.015 to 0.052 mm (0.000591 to 0.00205 in.)

        Maximum Oil Clearance

        Item Specified Condition
        No. 1 Journal 0.10 mm (0.00394 in.)
        Other Journals 0.09 mm (0.00354 in.)

        If the oil clearance is more than the maximum, inspect the inner compression spring. If necessary, replace the camshaft. If the oil clearance is still more than the maximum after replacing the camshaft, replace the camshaft housing sub-assembly RH.

    2. for Bank 2:
      1. Clean the camshaft bearing caps, camshaft housing sub-assembly LH and camshaft journals.
      2. Place the camshafts on the camshaft housing sub-assembly LH.
      3. Lay a strip of Plastigage across each camshaft journal.
        GTY807899Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Plastigage
      4. Install the camshaft bearing caps (See step  22).
        NOTE:

        Do not turn the camshaft.

      5. Remove the camshaft bearing caps (See step  58).
      6. Measure the Plastigage at its widest point.
        GTY814487Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Plastigage
        *b No. 1 Journal
        *c Other Journals

        Standard Oil Clearance

        Item Specified Condition
        No. 1 Journal 0.032 to 0.071 mm (0.00126 to 0.00280 in.)
        Other Journals 0.025 to 0.062 mm (0.00098 to 0.00240 in.)

        Maximum Oil Clearance

        Item Specified Condition
        No. 1 Journal 0.10 mm (0.00394 in.)
        Other Journals 0.09 mm (0.00354 in.)

        If the oil clearance is more than the maximum, inspect the inner compression spring. If necessary, replace the camshaft. If the oil clearance is still more than the maximum after replacing the camshaft, replace the camshaft housing sub-assembly LH.

  17. INSPECT EXHAUST MANIFOLD SUB-ASSEMBLY 
    1. Using a precision straightedge and feeler gauge, measure the warpage of the surface which contacts the cylinder head.
      GTY781330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a for Bank 1
      *b for Bank 2

      Maximum warpage

      0.5 mm (0.0197 in.)

      If the warpage is more than the maximum, replace the exhaust manifold sub-assembly.

  18. INSPECT INTAKE MANIFOLD 
    1. Using a precision straightedge and feeler gauge, measure the warpage of the surfaces which contact the cylinder head and intake air surge tank.
      GTY820712Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Intake Air Surge Tank Side
      *b Cylinder Head Side

      Maximum warpage

      0.10 mm (0.00394 in.)

      If the warpage is more than the maximum, replace the intake manifold.

scientia non olet · About LEMON Manuals