Valve Clearance: Adjustments

2UZ-FE ENGINE MECHANICAL: VALVE CLEARANCE: ADJUSTMENT

ADJUSTMENT

1. DISCHARGE FUEL SYSTEM PRESSURE Testing and Inspection

2. REMOVE THROTTLE BODY COVER SUB-ASSEMBLY Removal

3. REMOVE AIR CLEANER HOSE ASSEMBLY Removal

4. REMOVE AIR SWITCHING VALVE ASSEMBLY
(a) Remove the air switching valve assembly Removal.
5. REMOVE IGNITION COIL ASSEMBLY Removal

6. REMOVE FAN AND GENERATOR V BELT Removal

7. REMOVE NO. 3 TIMING BELT COVER SUB-ASSEMBLY LH Removal

8. REMOVE NO. 3 TIMING BELT COVER SUB-ASSEMBLY RH Removal

9. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY Removal

10. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY LH Removal

11. SET NO. 1 CYLINDER TO TDC/COMPRESSION





(a) Turn the crankshaft pulley to align its notch with timing mark "0" of the No. 1 timing belt cover.






(b) Check that the timing marks of the camshaft timing pulleys and timing belt rear plates are aligned.
If not, turn the crankshaft 1 complete revolution (360°) and align the marks as above.
12. INSPECT VALVE CLEARANCE






(a) Check only the valves indicated.
(1) Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
Standard Valve Clearance (Cold):





(2) Record the out-of-specification valve clearance measurements. They will be used later to determine the required replacement adjusting shim.






(b) Turn the crankshaft 1 complete revolution (360°) and align the camshaft timing marks.
(c) Check only the valves indicated in the illustration.
(1) Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
Standard Valve Clearance (Cold):





(2) Record the out-of-specification valve clearance measurements. They will be used later to determine the required replacement adjusting shim.
13. ADJUST VALVE CLEARANCE
(a) Remove the timing belt Removal.
(b) Remove the camshaft Removal.
(c) Remove the valve lifter and adjusting shim.
NOTE: Be careful not to drop the adjusting shim into the cylinder head.

(d) Determine the replacement adjusting shim size according to the formula or charts below.





(1) Using a micrometer, measure the thickness of the removed shim.
(2) Calculate the thickness of a new shim so that the valve clearance comes within the specified value.
T:
Thickness of removed shim
A:
Measured valve clearance
N:
Thickness of new shim
Intake:
N = T + (A - 0.20 mm (0.00787 in.))
Exhaust:
N = T + (A - 0.30 mm (0.0118 in.))
(3) Select a new shim with a thickness as close as possible to the calculated value.
HINT:
- Shims are available in 41 increments of 0.020 mm (0.000787 in.), from 2.00 mm (0.0787 in.) to 2.80 mm (0.1102 in.).
- Refer to the Adjusting Shim Selection Chart.





Intake valve clearance (Cold):
0.15 to 0.25 mm (0.00591 to 0.00984 in.)
EXAMPLE:
The 2.300 mm (0.0906 in.) shim is installed, and the measured clearance is 0.440 mm (0.0173 in.). Replace the 2.300 mm (0.0906 in.) shim with a No. 54 shim.
New Shim Thickness:










Exhaust valve clearance (Cold):
0.25 to 0.35 mm (0.00984 to 0.0138 in.)
EXAMPLE:
The 2.300 mm (0.0906 in.) shim is installed, and the measured clearance is 0.440 mm (0.0173 in.). Replace the 2.300 mm (0.0906 in.) shim with a No. 44 shim.
New Shim Thickness:






(e) Place a new adjusting shim on the valve.
(f) Place the valve lifter.
(g) Install the camshaft Installation.
(h) Install the timing belt Installation.
(i) Check the valve clearance.
If the result is not as specified, adjust the valve clearance.
14. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY LH Installation

15. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY Installation

16. INSTALL NO. 3 TIMING BELT COVER SUB-ASSEMBLY RH Installation

17. INSTALL NO. 3 TIMING BELT COVER SUB-ASSEMBLY LH Installation

18. INSTALL IGNITION COIL ASSEMBLY Installation

19. INSTALL AIR SWITCHING VALVE ASSEMBLY
Install the air switching valve assembly Installation.
20. INSTALL FAN AND GENERATOR V BELT Installation

21. INSTALL AIR CLEANER HOSE ASSEMBLY Installation

22. INSTALL THROTTLE BODY COVER SUB-ASSEMBLY Installation

23. INSPECT FOR OIL LEAK Replacement