Valve Clearance: Testing and Inspection

Valve Clearance

INSPECTION

CAUTION:
If engine oil is spilt onto the exhaust pipe, wipe it off with cloth to avoid emission of smoke or causing a fire.

NOTE:
Inspection of valve clearance should be performed while engine is cold.

1) Remove the collector cover.

NOTE:
Follow the steps below when removing the collector cover.

(1) Pull up the two points at the rear (A).
(2) Pull up the two points at the front (B) while moving them forward.





2) Disconnect the ground cable from battery.
3) Lift up the vehicle.
4) Remove the under cover.
5) Lower the vehicle.
6) When inspecting #1, #3 and #5 cylinders
(1) Remove the air intake duct, air cleaner case and air intake boot assembly.
(2) Remove the fuel pipe protector (RH).





(3) Disconnect the connector of oil pressure switch.
(4) Remove the ignition coil.
(5) Remove the rocker cover (RH).
7) When inspecting #2, #4 and #6 cylinders
(1) Remove the battery and battery carrier.
(2) Remove two fixing clips on the fuel pipe protector (LH).





(3) Generator connector
(4) Generator terminal B
(5) Remove the harness cover from collector cover bracket.
(6) A/C compressor solenoid connector
(7) Flow sensor connector





(8) Slide the harness and connector to the battery side.
(9) Disconnect the PCV hose and blow-by hose from the rocker cover (LH).





(10) Remove the fuel pipe protector (LH).





(11) Remove the ignition coil.
(12) Remove the rocker cover (LH).
8) Turn the crankshaft clockwise until the camshaft is set to position shown in the figure.





9) Measure the clearance of intake valve and exhaust valve using thickness gauge (A).

NOTE:
^ Measure it within the range of ±30° from specified position shown in the figure.
^ Insert a thickness gauge in a direction as horizontal as possible with respect to the valve lifter.

Valve clearance (inspection value):
Intake
0.20[+0.04/-0.06] mm (0.0079[+0.0016/-0.0024] in)
Exhaust
0.35±0.05 mm (0.0138±0.0020 in)

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





10) If necessary, adjust the valve clearance.
11) Further turn the crank pulley clockwise and then measure the valve clearances again.
12) After inspection, install the related parts in the reverse order of removal.