Valve Clearance: Testing and Inspection
Valve ClearanceINSPECTION
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 (A) 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 ± 0.04 mm (0.0079 ± 0.0016 inch)
Exhaust, 0.25 ± 0.04 mm (0.0098 ± 0.0016 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, 33 Nm (3.4 kgf-m, 24.6 ft. lbs.)