Engine Unit: Inspection

HINT

When viewed from the rear of the engine assembly, Bank 1 is on the left side and Bank 2 is on the right side.

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

2. INSPECT VALVE LASH ADJUSTER ASSEMBLY 
   NOTE:

   • Keep the adjuster free from dirt and foreign objects.
   • Use only clean engine oil.
     Fig 1: Checking Valve Rocker Arm

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Place the lash adjuster into a container full of new engine oil
   2. Insert SST's tip into the lash adjuster's plunger and use the tip to press down on the check ball inside the plunger

      SST 09276-75010 

   3. Squeeze SST and the lash adjuster 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 high-pressure air from the compression 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 the 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 with a new one.

      Fig 2: Checking Movement Of Plunger And Bleed Air

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. INSPECT CYLINDER HEAD SET BOLT 
   1. Using a vernier caliper, measure the minimum diameter of the elongated thread at the measuring point

      Measuring point: 

      90 mm (3.54 in.) for intake side bolt 

      85 mm (3.35 in.) for exhaust side bolt 

      Standard outside diameter: 

      10.85 to 11.00 mm (0.427 to 0.433 in.) 

      Minimum outside diameter: 

      10.6 mm (0.417 in.) 

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

      Fig 3: Identifying Cylinder Head Set Bolt Measuring Point

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT

      If a visual check reveals no excessively thin areas, check the center of the bolt (see ) and find the area that has the lowest diameter.

4. INSPECT CAMSHAFT 
   1. Inspect the bank 1 camshaft (see INSPECTION  ).
   2. Inspect the bank 2 camshaft (see INSPECTION  ).
5. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY 
   1. Inspect the bank 1 camshaft timing gear (see INSPECTION  )
   2. Inspect the bank 2 camshaft timing gear (see INSPECTION  )
6. INSPECT CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY 
   1. Inspect the bank 1 camshaft timing exhaust gear (see INSTALLATION  ).
   2. Inspect the bank 2 camshaft timing exhaust gear (see INSPECTION  ).
7. INSPECT NO. 1 CHAIN SUB-ASSEMBLY 
   1. Using a spring scale, pull the chain with a force of 147 N (15 kgf, 33 0 lbf) as shown in the illustration.
   2. Using a vernier caliper, measure the length of 15 pins.

      Maximum chain elongation: 

      136.9 mm (5.39 in.) 

      If the elongation is greater than the maximum, replace the No. 1 chain

      NOTE: Perform the measurement at 3 random places.
      Fig 4: Measuring No 1 Chain Length

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. INSPECT NO. 2 CHAIN SUB-ASSEMBLY 
   1. Using a spring scale, pull the chain with a force of 147 N (15 kgf, 33.0 lbf) as shown in the illustration.
   2. Using a vernier caliper, measure the length of 15 pins

      Maximum chain elongation: 

      137.6 mm (5.42 in.) 

      If the elongation is greater than the maximum, replace the No. 2 chain.

      NOTE: Perform the measurement at 3 random places.
      Fig 5: Measuring No 2 Chain Length

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. INSPECT CRANKSHAFT TIMING SPROCKET RH 
   1. Wrap the chain around the sprocket.
   2. Using a vernier caliper, measure the sprocket diameter with the chain.

      Minimum sprocket diameter (w/ chain): 

      61.4 mm (2.42 in.) 

      If the diameter is less than the minimum, replace the chain and crankshaft timing sprocket RH.

      HINT:

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

      Fig 6: Measuring Crankshaft Timing Sprocket Diameter (RH)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
10. INSPECT CRANKSHAFT TIMING SPROCKET LH 
    1. Wrap the chain around the sprocket.
    2. Using a vernier caliper, measure the sprocket diameter with the chain.

       Minimum sprocket diameter (w/ chain): 

       61.4 mm (2.42 in.) 

       If the diameter is less than the minimum, replace the chain and crankshaft timing sprocket LH.

       HINT

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

       Fig 7: Measuring Crankshaft Timing Sprocket Diameter (LH)

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
11. INSPECT NO. 1 CHAIN TENSIONER ASSEMBLY 
    1. Move the stopper plate clockwise to release the lock. Push the plunger and check that it moves smoothly

       If necessary, replace the No. 1 chain tensioner.

       Fig 8: Checking No 1 Chain Tensioner Assembly

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
12. INSPECT NO. 2 CHAIN TENSIONER ASSEMBLY 
    1. Check that the plunger moves smoothly.
    2. Measure the worn depth of the chain tensioner

       Maximum depth: 

       0.9 mm (0.0354 in.) 

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

       Fig 9: Checking No 2 Chain Tensioner Assembly

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
13. INSPECT NO. 3 CHAIN TENSIONER ASSEMBLY
    1. Check that the plunger moves smoothly.
    2. Measure the worn depth of the chain tensioner

       Maximum depth: 

       0.9 mm (0.0354 in.) 

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

       Fig 10: Checking No 3 Chain Tensioner Assembly

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
14. INSPECT NO. 1 CHAIN TENSIONER SLIPPER 
    1. for LH.
       1. Measure the worn depth of the chain tensioner slipper.

          Maximum depth: 

          1.0 mm (0.0394 in.) 

          If the depth is greater than the maximum, replace the No. 1 chain tensioner slipper

          Fig 11: Identifying Worn Depth Of Chain Tensioner Slipper (For LH)

          Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. for RH.
       1. Measure the worn depth of the chain tensioner slipper.

          Maximum depth: 

          1.0 mm (0.0394 in.) 

          If the depth is greater than the maximum, replace the No 1 chain tensioner slipper

          Fig 12: Identifying Worn Depth Of Chain Tensioner Slipper (For RH)

          Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
15. INSPECT NO. 1 CHAIN VIBRATION DAMPER 
    1. for LH:
       1. Measure the worn depth of the chain vibration damper

          Maximum depth: 

          1.0 mm (0.0394 in.) 

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

          Fig 13: Identifying Worn Depth Of Chain Vibration Damper (For LH)

          Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. for RH
       1. Measure the worn depth of the chain vibration damper

          Maximum depth: 

          1.0 mm (0.0394 in.) 

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

16. INSPECT CYLINDER HEAD SUB-ASSEMBLY  (See INSPECTION  )
17. INSPECT CAMSHAFT OIL CLEARANCE 
    Fig 14: Identifying Worn Depth Of Chain Vibration Damper (For RH)

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Inspect the bank 1 camshaft oil clearance (see INSPECTION  ).
    2. Inspect the bank 2 camshaft oil clearance (see INSPECTION  )
18. INSPECT EXHAUST MANIFOLD SUB-ASSEMBLY LH 
    1. Using a precision straightedge and feeler gauge, measure the warpage of the surface where the exhaust manifold LH contacts the cylinder head.

       Maximum warpage: 

       0.7 mm (0.0276 in.) 

       If the warpage is greater than the maximum, replace the exhaust manifold LH

       Fig 15: Measuring Exhaust Manifold For Warpage (LH)

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
19. INSPECT EXHAUST MANIFOLD SUB-ASSEMBLY RH 
    1. Using a precision straightedge and feeler gauge, measure the warpage of the surface where the exhaust manifold RH contacts the cylinder head.

       Maximum warpage: 

       0.7 mm (0.0276 in.) 

       If the warpage is greater than the maximum, replace the exhaust manifold RH

       Fig 16: Measuring Exhaust Manifold For Warpage (RH)

       Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002