Valve Clearance: Testing and Inspection
INSPECTIONCAUTION: Inspection and Adjustment of valve clearance should be preformed while engine is cold.
1 Set the Vehicle onto Lift.
2 Lift-up Vehicle.
3 Remove Under Door.
4 Disconnect Battery ground cable.
5 Lower the vehicle.
6 Remove timing belt cover (LH).
7 Remove rocker door.
8 When Inspecting #1 and #3 cylinders;
a Remove bolt which secures air intake duct to radiator panel side.
b Remove air intake duct as unit.
c Remove bolt, and then remove resonator chamber.
d Disconnect spark plug cords from spark plug (#1 and #3 cylinders).
e Disconnect PCV hose from rocker cover (RH).
f Remove bolts, then remove rocker cover (RH).
9 When inspecting #2 and #4 cylinders;
a Disconnect battery cables, and then remove battery and battery carrier.
b Remove the two bolts which hold washer tank.
c Disconnect washer motor connectors.
d Move washer tank to forward.
e Disconnect spark plug cords from spark plugs (#2 and #4 cylinders).
f Disconnect PCV hose from rocker cover (LH).
g Remove Bolts, then remove rocker cover (LH).
10 Set #1 cylinder piston to top dead center of compression stroke by rotating crankshaft pulley clockwise.
NOTE: When arrow mark on camshaft sprocket (LH) comes exactly to the top, #1 cylinder piston is brought to the top dead center of compression stroke.
11 Measure #1 cylinder valve clearance by using thickness gauge.
CAUTION:
^ Insert the thickness gauge in as horizontal a direction as possible with respect to the valve stem end face.
^ Measure exhaust valve clearances while lifting-up the vehicle.
VALVE CLEARANCE:
INTAKE; 0.20 +/- 0.02 mm (0.0079 +/- 0.0008 in)
EXHAUST; 0.25 +/- 0.02 mm (0.0098 +/- 0.0008 in)
12 If necessary, adjust the valve clearance.
13 Similar to measurement procedures used for #1 cylinder, measure #2, #3 and #4 cylinder valve clearances.
NOTE:
^ Be sure to set cylinder pistons to their respective top dead centers on compression stroke before measuring valve clearances.
^ To set #3, #2 and #4 cylinder pistons to their top dead centers on compression stroke, turn crankshaft pulley clockwise 180° at a time starting arrow mark on left-hand camshaft sprocket facing up.
14 After inspection, install the related parts in the reverse order of removal.
Tightening torque:
^ Resonator Chamber, 32 +/- 10 Nm (3.3 +/- 1.0 kg-m, 24 +/- 7 ft-lb)
ADJUSTMENT
CAUTION: Adjustment of valve clearance should be performed while engine is cold.
1 Set #1 cylinder piston to top dead center of compression stroke by rotating crankshaft pulley clockwise.
Note: When arrow mark on camshaft sprocket (LH) comes exactly to the top, #1 cylinder piston is brought to the top dead center of compression stroke.
2 Adjust the #1 cylinder valve clearance.
a Loosen the valve rocker nut and screw.
b Place suitable thickness gauge.
c While noting valve clearance, tighten valve rocker adjust screw.
d When specified valve clearance is obtained, tighten valve rocker nut.
Tightening Torque: 10 +/- 1 Nm (1.0 +/- 0.1 kg-m, 7.2 +/- 0.7 ft-lb)
VALVE CLEARANCE:
INTAKE; 0.20 +/- 0.02 mm (0.0079 +/- 0.0008 in)
EXHAUST; 0.25 +/- 0.02 mm (0.0098 +/- 0.0008 in)
3 Ensure that valve clearances are within specifications.
4 Turn crankshaft two complete rotations until #1 cylinder Piston is again set to top dead center on compression stroke.
5 Ensure that valve clearances are within specifications. If necessary, readjust valve clearances.
6 Similar to adjustment procedures used for #1 cylinder, adjust #2, #3 and #4 cylinder valve clearances.
NOTE:
^ Be sure to set cylinder pistons to respective top dead centers on compression stroke before adjusting valve clearances.
^ To set #3, #2 and #4 cylinder pistons to their top dead centers on compression stroke, turn crankshaft pulley clockwise 90° at a time starting with arrow mark on left-hand camshaft sprocket facing up.