Valve Clearance: Testing and Inspection

Valve Clearance

INSPECTION

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 a 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) Disconnect the connector of ignition coil.
3) Remove the ignition coil.
4) Place a suitable container under the vehicle.
5) Disconnect the PCV hose from the rocker cover (RH).
6) Remove the bolts, then remove the rocker cover (RH).
11) When inspecting #2 and #4 cylinders
1) Disconnect the battery cable, and then remove the battery and battery carrier.
2) Remove the secondary air pump.
3) Disconnect the connector of ignition coil.
4) Remove the ignition coil.
5) Place a suitable container under the vehicle.
6) Disconnect the PCV hose from the rocker cover (LH).
7) Remove the bolts, then remove the rocker cover (LH).
12) Turn the crank pulley clockwise until the round mark and arrow mark on the camshaft 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.
^ Measure the exhaust valve clearances while lifting up the vehicle.
^ If the measured value is not within specification, take notes of the value in order to adjust the valve clearance later on.





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.