Valve Clearance: Adjustments

2AZ-FE ENGINE MECHANICAL: VALVE CLEARANCE: ADJUSTMENT

ADJUSTMENT

1. REMOVE FRONT WHEEL RH
2. REMOVE ENGINE UNDER COVER LH
3. REMOVE ENGINE UNDER COVER RH
4. REMOVE FRONT FENDER APRON SUB-ASSEMBLY RH
5. REMOVE NO. 1 ENGINE COVER Removal
6. REMOVE IGNITION COIL ASSEMBLY Removal
7. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY Removal
8. SET NO. 1 CYLINDER TO TDC/COMPRESSION Removal
9. CHECK 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 any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve clearance lifters.
(b) Turn the crankshaft 1 revolution (360°) and set the No. 4 cylinder to TDC/compression.





(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 any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve lifters.
10. ADJUST VALVE CLEARANCE
(a) Remove the No. 2 camshaft Removal.
(b) Remove the camshaft Removal.
(c) Remove the valve lifters.





(d) Using a micrometer, measure the thickness of the removed valve lifters.
(e) Calculate the thickness of a new lifter so that the valve clearance comes within the specified values.
New Lifter Thickness:










CALCULATION EXAMPLE (Intake):
1. Measured intake valve clearance = 0.40 mm (0.0158 in.)
(Measured - Specification = Excess clearance)
1. 0.40 mm (0.0158 in.) - 0.24 mm (0.0095 in.) = 0.16 mm (0.0063 in.)
2. Measured used lifter measurement = 5.250 mm (0.2067 in.)
3. New lifter thickness = 5.410 mm (0.2130 in.)
(Excess clearance + Used lifter thickness = Ideal new lifter)
1. 0.16 mm (0.0063 in.) + 5.250 mm (0.2067 in.) = 5.410 mm (0.2130 in.)
4. 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 (0.0008 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 (0.0075 to 0.0114 in.)
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.
(h) 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.)
EXAMPLE:
The 5.340 mm (0.2102 in.) lifter is installed, and the measured clearance is 0.430 mm (0.0169 in.). Replace the 5.340 mm (0.2102 in.) lifter with a new No. 42 lifter.
(i) Install the selected valve lifter.
11. INSTALL CAMSHAFT Installation
12. INSTALL NO. 2 CAMSHAFT Installation
13. INSTALL NO. 1 CHAIN TENSIONER Installation
14. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY Installation
15. INSTALL IGNITION COIL ASSEMBLY Installation
16. INSPECT FOR ENGINE OIL LEAK
17. INSTALL NO. 1 ENGINE COVER Installation
18. INSTALL FRONT FENDER APRON RH
19. INSTALL ENGINE UNDER COVER LH
20. INSTALL ENGINE UNDER COVER RH
21. INSTALL FRONT WHEEL RH