Valve Clearance: Testing and Inspection
Valve ClearanceINSPECTION
NOTE: Inspection and adjustment of the valve clearance should be performed while engine is cold.
1. Set the vehicle on a lift.
2. Lift-up the vehicle.
3. Remove the under cover.
4. Lower the vehicle.
5. Disconnect the ground cable from battery.
6. Remove the belt cover (LH).
7. When inspecting the #1 and #3 cylinders;
1. Disconnect the spark plug cords from spark plugs RH side.
2. Disconnect the PCV hose from rocker cover (RH).
3. Remove the bolts, and then remove the rocker cover (RH).
8. When inspecting the #2 and #4 cylinders;
1. Disconnect the spark plug cords from spark plugs (LH Side)
2. Disconnect the PCV hose from rocker cover (LH).
3. Remove the bolts, and then remove the rocker cover (LH).
9. Set the #1 cylinder piston to top dead center of compression stroke by rotating crankshaft pulley clockwise using ST.
ST 499977100 CRANK PULLEY WRENCH
NOTE: When arrow mark (A) on the camshaft sprocket (LH) comes exactly to the top, #1 cylinder piston is brought to the top dead center of compression stroke.
10. Measure the #1 cylinder valve clearance by using thickness gauge.
CAUTION:
^ Insert the thickness gauge (A) in as horizontal a direction as possible with respect to the valve stem end face.
^ Measure the 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 the #2, #3 and #4 cylinder valve clearances.
NOTE:
^ Be sure to set the cylinder pistons to their respective top dead centers on compression stroke before measuring valve clearances.
^ To set the #3, #2 and #4 cylinder pistons to their top dead centers on compression stroke, turn the crankshaft pulley clockwise 90° at a time starting with arrow mark on camshaft sprocket (LH) facing up.
13. After inspection, install the related parts in the reverse order of removal.
Resonator chamber:
Air cleaner case; 33 Nm (3.4 kgf-m, 25 ft. lbs.)