Valve Clearance: Adjustments
2AZ-FXE ENGINE MECHANICAL: VALVE CLEARANCE: ADJUSTMENT
1. REMOVE FRONT WHEEL RH
2. REMOVE REAR ENGINE UNDER COVER RH
3. REMOVE COOL AIR INTAKE DUCT SEAL Removal
4. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY Removal
5. REMOVE IGNITION COIL ASSEMBLY Removal
6. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY Removal
7. SET NO. 1 CYLINDER TO TDC/COMPRESSION
(a) Turn the crankshaft pulley until its groove and the timing mark "0" of the timing chain cover are aligned.
Text in Illustration
(b) Check that each timing mark of the camshaft timing gear and sprocket is aligned with each timing mark located on the No. 1 and No. 2 bearing caps as shown in the illustration.
If not, turn the crankshaft by 1 revolution (360°) to align the timing marks as above.
8. CHECK VALVE CLEARANCE
(a) Check only the valves indicated.
Text in Illustration
(1) Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
Standard Valve Clearance (Cold):
(2) Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve lifters.
(b) Turn the crankshaft 1 revolution (360°) and set the No. 4 cylinder to the TDC/compression.
(c) Check only the valves indicated.
Text in Illustration
(1) Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
Standard Valve Clearance (Cold):
(2) Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve lifters.
9. ADJUST VALVE CLEARANCE
(a) Remove the camshaft.
HINT
See the steps from Set No. 1 Cylinder to TDC/Compression through Remove Camshaft Removal.
(b) Remove the valve lifters.
HINT
Arrange the valve lifters in the same order as removed.
(c) Using a micrometer, measure the thickness of the removed valve lifters.
(d) Calculate the thickness of a new lifter so that the valve clearance comes within the specified range.
New Lifter Thickness:
(e) CALCULATION EXAMPLE (Intake):
* Measured intake valve clearance = 0.40 mm (0.0157 in.)
* (Measured - Specification = Excess clearance)
* 0.40 mm (0.0157 in.) - 0.24 mm (0.00945 in.) = 0.16 mm (0.00630 in.)
* Measured used lifter thickness = 5.250 mm (0.2067 in.)
* New lifter thickness = 5.410 mm (0.2130 in.)
* (Excess clearance + Used lifter thickness = Ideal new lifter)
* 0.16 mm (0.00630 in.) + 5.250 mm (0.2067 in.) = 5.410 mm (0.2130 in.)
* Closest new lifter = 5.420 mm (0.2134 in.)
* Select No. 42 lifter
(f) Select a new lifter with a thickness as close as possible to the calculated values.
HINT
* Lifters are available in 35 sizes in increments of 0.020 mm (0.000787 in.), from 5.060 to 5.740 mm (0.1992 to 0.2260 in.).
* The identification number inside the valve lifters shows the value to 2 decimal places. (The illustration shows 5.420 mm (0.2134 in.))
(g) Valve lifter selection chart (intake).
New Lifter Thickness
Standard intake valve clearance (cold):
0.19 to 0.29 mm (0.00748 to 0.0114 in.)
(h) EXAMPLE:
The 5.250 mm (0.2067 in.) lifter is installed, and the measured clearance is 0.400 mm (0.0157 in.). Replace the 5.250 mm (0.2067 in.) lifter with a new No. 42 lifter.
(j) Valve lifter selection chart (exhaust).
New Lifter Thickness
Standard exhaust valve clearance (cold):
0.38 to 0.48 mm (0.0150 to 0.0189 in.)
(k) EXAMPLE:
The 5.340 mm (0.2102 in.) lifter is installed, and the measured clearance is 0.510 mm (0.0201 in.). Replace the 5.340 mm (0.2102 in.) lifter with a new No. 42 lifter.
(m) Install the selected valve lifter.
(n) Install the camshaft.
HINT
See the steps from Install Camshaft through Install No. 1 Chain Tensioner Installation.
10. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY Installation
11. INSTALL IGNITION COIL ASSEMBLY Installation
12. INSPECT FOR OIL LEAK
13. INSTALL NO. 1 ENGINE COVER SUB-ASSEMBLY Installation
14. INSTALL COOL AIR INTAKE DUCT SEAL Installation
15. INSTALL REAR ENGINE UNDER COVER RH
16. INSTALL FRONT WHEEL RH
Torque : 103 Nm (1050 kgf-cm, 76 ft-lbf)