Engine Unit: Inspection: 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.

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.
  
  Fig 1: Checking Roller Rotation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT VALVE LASH ADJUSTER ASSEMBLY
NOTE:
- Keep the adjuster free from dirt and foreign objects.
- Use only clean engine oil.
1. Place the lash adjuster into a container full of new engine oil.
  
  Fig 2: Checking Movement Of Plunger And Bleed Air
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
INSPECT CYLINDER HEAD SET BOLT
1. Using a vernier caliper, measure the minimum diameter of the elongated thread at the measuring point.
  
  Fig 3: Identifying Cylinder Head Bolt Dimension
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  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.
  
  HINT:
  
  If a visual check reveals no excessively thin areas, check the center of the bolt (see Fig 3illustration) and find the area that has the lowest diameter.
INSPECT CAMSHAFT
1. Inspect the bank 1 camshaft See step 3.
2. Inspect the bank 2 camshaft See step 3.
INSPECT CAMSHAFT TIMING GEAR ASSEMBLY
1. Inspect the bank 1 camshaft timing gear See step 1.
2. Inspect the bank 2 camshaft timing gear See step 1.
INSPECT CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY
1. Inspect the bank 1 camshaft timing exhaust gear See step 2.
2. Inspect the bank 2 camshaft timing exhaust gear See step 2.
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.
  
  Fig 4: Measuring Length Of 15 Pins
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
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.
  
  Fig 5: Measuring Length Of 15 Pins
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
INSPECT CRANKSHAFT TIMING SPROCKET RH
1. Wrap the chain around the sprocket.
  
  Fig 6: Measuring Sprocket Diameter With Chain
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
INSPECT CRANKSHAFT TIMING SPROCKET LH
1. Wrap the chain around the sprocket.
  
  Fig 7: Measuring Sprocket Diameter With Chain
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
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.
  
  Fig 8: Checking No 1 Chain Tensioner Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If necessary, replace the No. 1 chain tensioner.
INSPECT NO. 2 CHAIN TENSIONER ASSEMBLY
1. Check that the plunger moves smoothly.
  
  Fig 9: Checking No 2 Chain Tensioner Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
INSPECT NO. 3 CHAIN TENSIONER ASSEMBLY
1. Check that the plunger moves smoothly.
  
  Fig 10: Inspecting No. 3 Chain Tensioner Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
INSPECT NO. 1 CHAIN TENSIONER SLIPPER
1. for LH:
  
  Fig 11: Identifying Worn Depth Of Chain Tensioner Slipper (For LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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.
2. for RH:
  
  Fig 12: Measuring Worn Depth Of Chain Tensioner Slipper (For Bank 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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.
INSPECT NO. 1 CHAIN VIBRATION DAMPER
1. for LH:
  
  Fig 13: Identifying Worn Depth Of Chain Vibration Damper (For LH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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.
2. for RH:
  
  Fig 14: Identifying Worn Depth Of Chain Vibration Damper (For RH)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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.
INSPECT CYLINDER HEAD SUB-ASSEMBLY See step 1
INSPECT CAMSHAFT OIL CLEARANCE
1. Inspect the bank 1 camshaft oil clearance See step 4.
2. Inspect the bank 2 camshaft oil clearance See step 4.
INSPECT EXHAUST MANIFOLD SUB-ASSEMBLY LH

Fig 15: Measuring Exhaust Manifold For Warpage (LH)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.
INSPECT EXHAUST MANIFOLD SUB-ASSEMBLY RH

Fig 16: Measuring Exhaust Manifold For Warpage (RH)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.