Valve Clearance: Testing and Inspection
Valve ClearanceINSPECTION
NOTE: Inspection and adjustment of valve clearance should be performed while engine is cold.
1. Set the vehicle on a lift.
2. Remove the collector cover.
3. Disconnect the ground cable from the battery.
4. Remove the air intake duct.
5. Remove the bolt which secures timing belt cover RH.
6. Lift up the vehicle.
7. Remove the under cover.
8. Loosen the remaining bolts which secure timing belt cover RH, then remove the timing belt cover.
9. Lower the vehicle.
10. When inspecting #1 and #3 cylinders
1. Remove the air cleaner case.
2. Remove the ignition coil.
3. Place a suitable container under the vehicle.
4. Disconnect the PCV hose from the rocker cover RH.
NOTE: For the PCV hose affixed with the clamp, fit the depression in the ST with the protrusion of the clamp as shown in the figure below, unlock the clamp and disconnect.
ST 18353AA000 CLAMP PLIERS
5. Remove the bolts, then remove the rocker cover RH.
11. When inspecting #2 and #4 cylinders
1. Remove the battery.
2. Remove the secondary air pump.
3. Remove the ignition coil.
4. Place a suitable container under the vehicle.
5. Disconnect the PCV hose from the rocker cover LH.
NOTE: For the PCV hose affixed with the clamp, fit the depression in the ST with the protrusion of the clamp as shown in the figure below, unlock the clamp and disconnect.
ST 18353AA000 CLAMP PLIERS
6. Remove the bolts, then remove the rocker cover LH.
12. Turn the crank pulley clockwise until the round mark and arrow mark on the cam sprocket are set to position shown in the figure.
NOTE: Turn the crankshaft using socket wrench.
13. Measure the #1 cylinder intake valve and #3 cylinder exhaust valve clearance by using thickness gauge (A).
NOTE:
^ Insert a thickness gauge in a direction as horizontal as possible with respect to the valve lifter.
^ Lift up the vehicle, and then measure the exhaust valve clearances.
^ If the measured value is not within specification, take notes of the value in order to adjust the valve clearance later on.
Valve clearance:
Intake 0.20 ± 0.02 mm (0.0079 ± 0.0008 in)
Exhaust 0.35 ± 0.02 mm (0.0138 ± 0.0008 in)
14. If necessary, adjust the valve clearance.
15. Further turn the crank pulley clockwise and then measure the valve clearances again.
1. Set the round mark and arrow mark on cam sprocket to the position shown in the figure, and measure the #2 cylinder exhaust valve and #3 cylinder intake valve clearances.
2. Set the round mark and arrow mark on cam sprocket to the position shown in the figure, and measure the #2 cylinder intake valve and #4 cylinder exhaust valve clearances.
3. Set the round mark and arrow mark on cam sprocket to the position shown in the figure, and measure the #1 cylinder exhaust valve and #4 cylinder intake valve clearances.
16. After inspection, install the related parts in the reverse order of removal.
NOTE:
^ Use a new rocker cover gasket.
^ Use a new clamp for the PCV hose clamp, fit the cut out in the ST with the protrusion on the clamp as shown in the figure, and lock the clamp.
ST 18353AA000 CLAMP PLIERS
