Valve Clearance: Adjustments

DESCRIPTION
Valve lash is the gap between the rocker arm adjusting screw and the valve stem when the valve is closed. Valve lash can be adjusted with a cold engine (coolant temperature 25°C [77°F]) or a hot engine (coolant temperature 68°C [154°F]).

SPECIFICATIONS
^ Intake valve cold valve lash is 0.13 to 0.17 mm (0.005 to 0.007 inch).
^ Intake valve hot valve lash is 0.17 to 0.21 mm (0.007 to 0.008 inch).
^ Exhaust valve cold valve lash is 0.13 to 0.17 mm (0.005 to 0.007 inch).
^ Exhaust valve hot valve lash is 0.17 to 0.21 mm (0.007 to 0.008 inch).

MEASUREMENT AND ADJUSTMENT PROCEDURES
1. Disconnect negative (-) battery cable.
2. Remove cylinder head cover.





3. Turn the crankshaft pulley clockwise until V mark (in white paint) on pulley is aligned with the 0 (zero) calibrated on timing belt cover.





4. Remove the distributor cap and check if rotor is positioned as shown. This position indicates No.1 piston is at TDC of compression stroke and valves to be adjusted are closed. If rotor is out of place, turn crankshaft pulley clockwise one revolution (360 degrees).





5. Using a feeler gage, measure the valve lash at valves (1), (2), (5) and (7).
6. If valve lash is out of specification, adjust it by loosening the adjusting screw locknut and turning the adjusting screw. After adjustment, hold the screw in position and tighten the locknut to specification.
^ Tighten the adjusting screw locknut to 17 Nm (13 ft. lbs.).
7. Rotate crankshaft one revolution (360°) clockwise and check valve lash at valves (3), (4), (6) and (8).
8. If valve lash is out of specification, adjust it by loosening the adjusting screw locknut and turning the adjusting screw. After adjustment, hold the screw in position and tighten the locknut to specification.
^ Tighten the adjusting screw locknut to 17 Nm (13 ft. lbs.).
9. Install the distributor cap on distributor.
10. Install the cylinder head cover.
11. Connect the negative battery cable.