Valve Clearance: Adjustments
2UZ-FE ENGINE MECHANICAL: VALVE CLEARANCE: ADJUSTMENT
ADJUSTMENT
1. DRAIN ENGINE COOLANT Service and Repair
2. SEPARATE BATTERY NEGATIVE TERMINAL
3. REMOVE V-BANK COVER SUB-ASSEMBLY
4. REMOVE ENGINE ROOM COVER SIDE
5. REMOVE ENGINE ROOM SIDE COVER LH
6. REMOVE AIR CLEANER HOSE ASSEMBLY
7. REMOVE RADIATOR SUPPORT SEAL UPPER
8. REMOVE FAN AND GENERATOR V BELT Removal
9. REMOVE OIL COOLER PIPE Removal
10. REMOVE IGNITION COIL ASSEMBLY
11. REMOVE NO. 3 TIMING BELT COVER SUB-ASSEMBLY LH Removal
12. REMOVE NO. 2 TIMING CHAIN OR BELT COVER Removal
13. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY
(a) Remove the 9 bolts, 9 seal washers and cylinder head cover.
14. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY LH
(a) Disconnect the PCV hose.
(b) Remove the 9 bolts, 9 seal washers and cylinder head cover.
15. 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.
16. INSPECT VALVE CLEARANCE
(a) Check only the valves indicated.
(1) Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
(2) Record the out-of-specification valve clearance measurements. They will be used later to determine the required replacement adjusting shim.
Valve clearance (Cold):
Intake
0.15 to 0.25 mm (0.006 to 0.010 in.)
Exhaust
0.25 to 0.35 mm (0.010 to 0.014 in.)
(b) Turn the crankshaft 1 complete revolution (360°) and align the camshaft timing marks.
(c) Check only the valves indicated as shown in the illustration. Measure the valve clearance.
17. ADJUST VALVE CLEARANCE
(a) Remove the timing belt Removal.
(b) Remove the camshafts (RH Bank) Removal.
(c) Remove the camshafts (LH Bank) Removal.
(d) Remove the valve lifter and adjusting shim.
NOTE:
Be careful not to drop the adjusting shim into the cylinder head.
(e) Determine the replacement adjusting shim size according to the formula or charts on the following pages.
(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 (0.008 in.))
Exhaust:
N = T + (A - 0.30 mm (0.012 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 (0.0008 in.), from 2.00 mm (0.0787 in.) to 2.80 mm (0.1102 in.).
- Refer to the new adjusting shim thickness table on the next 2 pages.
(f) Place a new adjusting shim on the valve.
(g) Place the valve lifter.
(h) Reinstall the camshafts (LH Bank) Installation.
(i) Reinstall the camshafts (RH Bank) Installation.
(j) Reinstall the timing belt Installation.
(k) Recheck the valve clearance.
18. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY LH
19. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY
20. INSTALL NO. 2 TIMING CHAIN OR BELT COVER Installation
21. INSTALL NO. 3 TIMING BELT COVER SUB-ASSEMBLY LH Installation
22. INSTALL IGNITION COIL ASSEMBLY
23. INSTALL OIL COOLER PIPE Installation
24. INSTALL FAN AND GENERATOR V BELT Installation
25. INSTALL RADIATOR SUPPORT SEAL UPPER
26. INSTALL AIR CLEANER HOSE ASSEMBLY
27. INSTALL ENGINE ROOM SIDE COVER LH
28. INSTALL ENGINE ROOM COVER SIDE
29. INSTALL V-BANK COVER SUB-ASSEMBLY
30. CONNECT BATTERY NEGATIVE TERMINAL
31. ADD ENGINE COOLANT Service and Repair