Valve Clearance: Testing and Inspection

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

1) Set the vehicle onto the lift.
2) Disconnect battery ground cable.





3) Remove bolts which secure the upper and center side of timing belt cover (RH).
4) Lift-up the vehicle.
5) Remove under cover.





6) Remove bolt which secures the under side of timing belt cover (RH), then remove belt cover.
7) Lower the vehicle.
8) Remove rocker cover.
- When inspecting #1 and #3 cylinders;





1) Disconnect connector from mass air flow sensor.





2) Loosen clamp which connects air intake duct to air intake chamber.
3) Remove the two clips from air cleaner upper cover.

CAUTION: Before installing air cleaner upper cover, align hole(s) with protruding portions of air cleaner lower case, then secure upper cover.

4) Disconnect blow-by hose from air intake duct.





5) Remove air intake duct and air cleaner upper cover as a unit.
6) Remove air cleaner element.





7) Remove air cleaner lower case.
8) Disconnect spark plug cords from spark plugs (#1 and #3 cylinders).
9) Place suitable container under the vehicle.
10) Disconnect PCV hose from rocker cover (RH).
11) Remove bolts, then remove rocker cover (RH).

- When inspecting # 2 and #4 cylinders;
1) Disconnect battery cables, and then remove battery and battery carrier.
2) Disconnect washer motor connectors.
3) Disconnect washer hoses from washer motors, then plug connections with suitable caps.
4) Remove washer tank.
5) Disconnect spark plug cords from spark plugs (#2 and #4 cylinders).
6) Place suitable container under the vehicle.
7) Disconnect PCV hose from rocker cover (LH).
8) Remove bolts, then remove rocker cover (LH).





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





10) Measure #1 cylinder intake valve and #3 cylinder exhaust valve clearances by using thickness gauge.

CAUTION:
- Insert the thickness gauge in as horizontal a direction as possible with respect to the shim.
- 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) Further turn crankshaft pulley clockwise.
Using the same procedures as in step 10), measure valve clearances.





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





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





3) Set arrow mark on camshaft sprocket to position shown in figure, and measure #1 cylinder exhaust valve and #4 cylinder intake valve clearances.
13) After inspection, install the related parts in the reverse order of removal.