Valve Adjustment
- Perform adjustment depending on selected head thickness of valve lifter.
- The specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differences caused by temperature. Use the specifications for hot engine condition to adjust.
- Remove camshaft. Refer to "REMOVAL AND INSTALLATION ".
- Remove the valve lifters at the locations that are outside the standard.
- Measure the center thickness of the removed valve lifters with a micrometer.
- Use the equation below to calculate valve lifter thickness for replacement.
- Valve lifter thickness calculation.
t = t1 + (C1 - C2)
t = Thickness of replacement valve lifter.
t1 = Thickness of removed valve lifter.
C1 = Measured valve clearance.
C2 = Standard valve clearance.
- Thickness of a new valve lifter can be identified by stamp marks on the reverse side (inside the cylinder).
Stamp mark 696 indicates a thickness of 6.96 mm (0.2740 in) Available thickness of valve lifter, refer to "AVAILABLE VALVE LIFTER ".
- Valve lifter thickness calculation.
- Install the selected valve lifter.
- Install camshaft. Refer to "INSTALLATION ".
- Manually turn crankshaft pulley a few turns.
- Check that valve clearances for cold engine are within specifications, refer to "VALVE CLEARANCE ".
- After completing the repair, check valve clearances again with the specifications for warmed engine. Use a feeler gauge to measure the clearance between the valve and camshaft. Make sure the values are within specifications. Refer to "VALVE CLEARANCE "