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) Disconnect the ground terminal from battery.
3) Remove the air intake duct.
4) Remove one bolt which secures the timing belt cover (RH).
5) Lift-up the vehicle.
6) Remove the under cover.
7) Loosen the remaining bolts which secure the timing belt cover (RH), then remove the belt cover.
8) Lower the vehicle.
9) When inspecting #1 and #3 cylinders:





1) Pull out the engine harness connector with bracket from air cleaner upper cover.
2) Remove the air cleaner case.
3) Disconnect the spark plug cords from spark plugs (#1 and #3 cylinders).
4) Place a suitable container under the vehicle.
5) Disconnect the PCV hose from rocker cover (RH).
6) Remove the bolts, then remove the rocker cover (RH).
10) When inspecting #2 and #4 cylinders:





1) Disconnect the battery terminal, and then remove the battery and battery carrier.





2) Remove the bolt which secures the engine harness bracket onto body.





3) Disconnect the washer motor connectors.





4) Remove the washer tank mounting bolts.





5) Move the washer tank upward.
6) Disconnect the spark plug cords from spark plugs (#2 and #4 cylinders).
7) Place a suitable container under the vehicle.
8) Disconnect the PCV hose from rocker cover (LH).
9) Remove the bolts, then remove the rocker cover (LH).





11) Turn the crankshaft pulley clockwise until arrow mark on the camshaft sprocket is set to position shown in the figure.

NOTE: Rotate the crankshaft using a socket wrench.





12) Measure #1 cylinder intake valve and #3 cylinder exhaust valve clearance by using thickness gauge (A).

CAUTION:
^ Insert the thickness gauge in as horizontal a direction as possible with respect to the shim.
^ 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)

NOTE: If the measured value is not within specification, take notes of the value in order to adjust the valve clearance later on.

13) If necessary, adjust the valve clearance.
14) Further turn the crankshaft pulley clockwise. Using the same procedures described previously, then measure valve clearances again.





1) Set the arrow mark on camshaft sprocket to position shown in the figure, and measure #2 cylinder exhaust valve and #3 cylinder intake valve clearances.





2) Set the arrow mark on camshaft sprocket to position shown in the figure, and measure #2 cylinder intake valve and #4 cylinder exhaust valve clearances.





3) Set the arrow mark on camshaft sprocket to position shown in the figure, and measure #1 cylinder exhaust valve and #4 cylinder intake valve clearances.





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