Valve Clearance: Testing and Inspection

Valve Clearance

INSPECTION

CAUTION: Inspection and adjustment of valve clearance should be performed while engine is cold.

1. Set the vehicle onto the lift.
2. Lift-up the vehicle.





3. Remove under cover.
4. Lower the vehicle.





5. Disconnect battery ground cable.





6. Remove timing belt cover (LH).





7. When inspecting #1 and #3 cylinders;
1. Remove air intake duct as a unit.





2. Remove bolt, and then remove resonator chamber.





3. Disconnect spark plug cords from spark plugs (#1 and #3 cylinders).
4. Disconnect PCV hose from rocker cover (RH).
5. Remove bolts, then remove rocker cover (RH).
8. When inspecting #2 and #4 cylinders;





1. Disconnect battery cables, and then remove battery and battery carrier.





2. Remove the two bolts which hold washer tank.





3. Disconnect washer motor connectors.





4. Move washer tank to forward.
5. Disconnect spark plug cords from spark plugs (#2 and #4 cylinders).
6. Disconnect PCV hose from rocker cover (LH).
7. Remove bolts, then remove rocker cover (LH).
9. Set #1 cylinder piston to top dead center of compression stroke by rotating crankshaft pulley clockwise.





NOTE: When arrow mark (A) on camshaft sprocket (LH) comes exactly to the top, #1 cylinder piston is brought to the top dead center of compression stroke.

10. Measure #1 cylinder valve clearance by using thickness gauge.

NOTE:
^ Insert the thickness gauge in as horizontal a direction as possible with respect to the valve stem end face.
^ Measure exhaust valve clearances while lifting up the vehicle.





Valve clearance:
Intake; 0.20 +/- 0.02 mm (0.0079 +/- 0.0008 inch)
Exhaust; 0.25 +/- 0.02 mm (0.0098 +/- 0.0008 inch)
11. If necessary, adjust the valve clearance.
12. Similar to measurement procedures used for #1 cylinder, measure #2, #3 and #4 cylinder valve clearances.





NOTE:
^ Be sure to set cylinder pistons to their respective top dead centers on compression stroke before measuring valve clearances.
^ To set #3, #2 and #4 cylinder pistons to their top dead centers on compression stroke, turn crankshaft pulley clockwise 90° at a time starting with arrow mark on left-hand camshaft sprocket facing up.





13. After inspection, install the related parts in the reverse order of removal.
Tightening torque:
Resonator chamber; 32 Nm (3.3 kgf-m, 24 ft. lbs.)