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.
2) Disconnect the ground cable from battery.
3) Lift up the vehicle.
4) Remove the under cover.
5) Lower the vehicle.
6) When inspecting the valve clearances for #1, #3 and #5
(1) Disconnect the brake booster vacuum hose from the intake manifold.





(2) Loosen the clamp (A) which connects air intake chamber to throttle body.
(3) Loosen the clamp (B) which connects intake boot to air intake chamber.
(4) Loosen the bolt (C) which secures air intake chamber and collector cover bracket to the stay.





(5) Remove the air intake chamber, and move it to the left side wheel apron.





(6) Remove the air cleaner case and intake boot.
(7) Remove the feed hose from the fuel pipe protector (RH).





(8) Remove the fuel pipe protector (RH).





(9) Disconnect the connector of oil pressure switch.
(10) Remove the ignition coil.
(11) Remove the rocker cover (RH).
7) When inspecting the valve clearances for #2, #4 and #6
(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) Magnet clutch connector





(7) Slide the harness and connector to the battery side.
(8) Disconnect the PCV hose from rocker cover (LH).





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





(10) Remove the ignition coil.
(11) 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.
^ If the measured value is not within specification, take notes of the value in order to adjust the valve clearance later on.

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)





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.