VALVE CLEARANCE
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Mechanical
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8. Valve Clearance
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S153083
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9) Set #1 cylinder piston to top dead center of compression stroke by rotating crankshaft pulley clockwise using ST.
ST 499977300 CRANKSHAFT PULLEY WRENCH
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.
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A: INSPECTION
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S153083A10
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CAUTION:
Inspection and adjustment of valve clearance
should be performed while engine is cold.
1) Set the vehicle onto the lift.
2) Lift-up the vehicle.
3) Remove under cover.
4) Disconnect battery ground cable.
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5) Lower the vehicle.
6) Remove timing belt cover (LH).
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10) 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 lift-ing-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)
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7) When inspecting #1 and #3 cylinders;
(1) Disconnect spark plug cords from spark plugs RH side. <Ref. to IG(SOHC)-4, RH SIDE, REMOVAL, Spark Plug.> or <Ref. to IG(SOHCw/oOBD)-5, RH SIDE, REMOVAL, Spark Plug.>
(2) Disconnect PCV hose from rocker cover (RH).
(3) Remove bolts, then remove rocker cover (RH).
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8)
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When inspecting #2 and #4 cylinders;
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(1) Disconnect spark plug cords from spark plugs (LH Side) <Ref. to IG(SOHC)-5, LH SIDE, REMOVAL, Spark Plug.> or <Ref. to IG(SOHCw/oOBD)-6, LH SIDE, REMOVAL, Spark Plug.>.
(2) Disconnect PCV hose from rocker cover (LH).
(3) Remove bolts, then remove rocker cover (LH).
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11) If necessary, adjust the valve clearance. <Ref. to ME(SOHC)-30, ADJUSTMENT, Valve ClearÂance.>
12) Similar to measurement procedures used for #1 cylinder, measure #2, #3 and #4 cylinder valve clearances.
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ME(SOHC)-29
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VALVE CLEARANCE
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Mechanical
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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 crankÂshaft pulley clockwise 90° at a time starting with arrow mark on left-hand camshaft sprocket facing up.
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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.
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2) Adjust the #1 cylinder valve clearance.
(1) Loosen the valve rocker nut and screw.
(2) Place suitable thickness gauge.
(3) While noting valve clearance, tighten valve rocker adjust screw.
(4) When specified valve clearance is obtained, tighten valve rocker nut.
Tightening torque:
10 Nm (1.0 kgf-m, 7.2 ft-lb)
CAUTION:
- Insert the thickness gauge in as horizontal a direction as possible with respect to the valve stem end face.
- Adjust exhaust valve clearances while lift-ing-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)
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13) After inspection, install the related parts in the reverse order of removal.
Tightening torque: Resonator chamber;
33 Nm (3.4 kgf-m, 24 ft-lb)
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B: ADJUSTMENT
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S153083A01
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CAUTION:
Adjustment of valve clearance should be perÂformed while engine is cold.
1) Set #1 cylinder piston to top dead center of compression stroke by rotating crankshaft pulley clockwise using ST.
ST 499977300 CRANKSHAFT PULLEY WRENCH
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3) Ensure that valve clearances are within speciÂfications.
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 speciÂfications. If necessary, readjust valve clearances.
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ME(SOHC)-30
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VALVE CLEARANCE
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Mechanical
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6) Similar to adjustment procedures used for #1 cylinder, adjust #2, #3 and #4 cylinder valve clearÂances.
NOTE:
- Be sure to set cylinder pistons to their 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 crankÂshaft pulley clockwise 90° at a time starting with arrow mark on left-hand camshaft sprocket facing up.
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ME(SOHC)-31
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