Engine Unit
1UR-FSE ENGINE MECHANICAL: ENGINE UNIT: INSPECTION
1. INSPECT NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY
(a) Turn the roller by hand to check that it turns smoothly.
If the roller does not turn smoothly, replace the valve rocker arm.
2. INSPECT VALVE LASH ADJUSTER ASSEMBLY
NOTICE:
* Keep the adjuster free from dirt and foreign objects.
* Use only clean engine oil.
(a) Place the lash adjuster into a container full of new engine oil.
(b) Insert the tip of SST into the lash adjuster's plunger and use the tip to press down on the check ball inside the plunger.
SST : 09276-75010
(c) Squeeze SST and the lash adjuster together to move the plunger up and down 5 to 6 times.
(d) Check the movement of the plunger and bleed air.
OK:
Plunger moves up and down.
NOTICE:
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.
(e) 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 hydraulic lash adjuster with a new one.
3. INSPECT CYLINDER HEAD SET BOLT
(a) Using a vernier caliper, measure the minimum diameter of the elongated thread at the measuring point.
Standard outside diameter:
10.85 to 11.00 mm (0.427 to 0.433 in.)
Minimum outside diameter:
10.6 mm (0.417 in.)
Measuring point:
90 mm (3.543 in.) for intake side bolt
85 mm (3.346 in.) for exhaust side bolt
HINT
* If a visual check shows no excessively thin areas, check the center of the bolt (see illustration) and find the area that has the lowest diameter.
* If the diameter is less than the minimum, replace the cylinder head bolt.
4. INSPECT CAMSHAFT
(a) Inspect the bank 1 camshaft Camshaft (for Bank 1).
(b) Inspect the bank 2 camshaft Camshaft (for Bank 2).
5. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY
(a) Inspect the bank 1 camshaft timing gear Camshaft (for Bank 1).
(b) Inspect the bank 2 camshaft timing gear Camshaft (for Bank 2).
6. INSPECT CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY
(a) Inspect the bank 1 camshaft timing exhaust gear Camshaft (for Bank 1).
(b) Inspect the bank 2 camshaft timing exhaust gear Camshaft (for Bank 2).
7. INSPECT CHAIN SUB-ASSEMBLY
(a) Using a spring scale, pull the chain with a force of 147 N (15 kgf, 33 lbf) as shown in the illustration.
(b) Using a vernier caliper, measure the length of 15 pins.
Maximum chain elongation:
136.9 mm (5.389 in.)
If the elongation is greater than the maximum, replace the chain.
NOTICE:
Perform the measurement at 3 random places.
8. INSPECT NO. 2 CHAIN SUB-ASSEMBLY
(a) Using a spring scale, pull the chain with a force of 147 N (15 kgf, 33 lbf) as shown in the illustration.
(b) Using a vernier caliper, measure the length of 15 pins.
Maximum chain elongation:
137.6 mm (5.417 in.)
If the elongation is greater than the maximum, replace the chain.
NOTICE:
Perform the measurement at 3 random places.
9. INSPECT CRANKSHAFT TIMING GEAR
(a) Wrap the chain around the sprocket.
(b) Using a vernier caliper, measure the sprocket diameter with the chain.
Minimum sprocket diameter (w/ chain):
61.4 mm (2.417 in.)
HINT
The vernier caliper must contact the chain rollers for the measurement.
If the diameter is less than the minimum, replace the chain and sprocket.
10. INSPECT CRANKSHAFT TIMING SPROCKET LH
(a) Wrap the chain around the sprocket.
(b) Using a vernier caliper, measure the sprocket diameter with the chain.
Minimum sprocket diameter (w/ chain):
61.4 mm (2.417 in.)
NOTICE:
The vernier caliper must contact the chain rollers for the measurement.
If the diameter is less than the minimum, replace the chain and sprocket.
11. INSPECT NO. 1 CHAIN TENSIONER ASSEMBLY
(a) Move the stopper plate upward to release the lock. Push the plunger and check that it moves smoothly.
If necessary, replace the chain tensioner.
12. INSPECT NO. 2 CHAIN TENSIONER ASSEMBLY
(a) Check that the plunger moves smoothly.
(b) Measure the worn depth of the chain tensioner.
Maximum depth:
0.9 mm (0.035 in.)
If the depth the is greater than the maximum, replace the chain tensioner.
13. INSPECT NO. 3 CHAIN TENSIONER ASSEMBLY
(a) Check that the plunger moves smoothly.
(b) Measure the worn depth of the chain tensioner.
Maximum depth:
0.9 mm (0.035 in.)
If the depth is greater than the maximum, replace the chain tensioner.
14. INSPECT CHAIN TENSIONER SLIPPER
(a) for Bank 1:
(1) Measure the worn depth of the chain tensioner slipper.
Maximum depth:
1.0 mm (0.039 in.)
If the depth is greater than the maximum, replace the chain tensioner slipper.
(b) for Bank 2:
(1) Measure the worn depth of the chain tensioner slipper.
Maximum depth:
1.0 mm (0.039 in.)
If the depth is greater than the maximum, replace the chain tensioner slipper.
15. INSPECT NO. 1 CHAIN VIBRATION DAMPER
(a) for Bank 1:
(1) Measure the worn depth of the chain vibration damper.
Maximum depth:
1.0 mm (0.039 in.)
If the depth is greater than the maximum, replace the chain vibration damper.
(b) for Bank 2:
(1) Measure the worn depth of the chain vibration damper.
Maximum depth:
1.0 mm (0.039 in.)
If the depth is greater than the maximum, replace the chain vibration damper.
16. INSPECT CYLINDER HEAD SUB-ASSEMBLY Testing and Inspection
17. INSPECT CAMSHAFT OIL CLEARANCE
(a) Inspect the bank 1 camshaft oil clearance Camshaft (for Bank 1).
(b) Inspect the bank 2 camshaft oil clearance Camshaft (for Bank 2).
18. INSPECT EXHAUST MANIFOLD SUB-ASSEMBLY LH
(a) Using a precision straightedge and feeler gauge, measure the warpage of the contact surface of the cylinder head.
Maximum warpage:
0.5 mm (0.020 in.)
If the warpage is greater than the maximum, replace the exhaust manifold.
19. INSPECT EXHAUST MANIFOLD SUB-ASSEMBLY RH
(a) Using a precision straightedge and feeler gauge, measure the warpage of the contact surface of the cylinder head.
Maximum warpage:
0.5 mm (0.020 in.)
If the warpage is greater than the maximum, replace the exhaust manifold.