Valve Clearance: Inspection

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 battery.
   Fig 1: Disconnecting Ground Cable From Battery

   
4. Lift-up the vehicle.
5. Remove the under cover.
6. Lower the vehicle.
7. When inspecting RH side cylinders:
   1. Remove the air intake duct and air cleaner case. < Ref. to REMOVAL , Air Intake Duct. > < Ref. to REMOVAL , Air Cleaner Case. >
   2. Remove the fuel tank protector (RH).
      Fig 2: Locating Fuel Tank Protector

      
   3. Disconnect the connector of oil pressure switch.
   4. Remove the ignition coil. < Ref. to REMOVAL , Ignition Coil. >
   5. Remove the rocker cover (RH).
8. When inspecting LH side cylinders:
   1. Disconnect the battery cable, and then remove the battery and battery carrier.
   2. Disconnect the PCV hose and blow-by hose from rocker cover (LH).
      Fig 3: Identifying PCV Hose And Blow-By Hose

      
   3. Remove the fuel pipe protector (LH).
      Fig 4: Locating Fuel Pipe Protector

      
   4. Remove the ignition coil. < Ref. to REMOVAL , Ignition Coil. >
   5. Remove the rocker cover (LH).
9. Turn the crankshaft clockwise until the cam is set to position shown in the figure.
   Fig 5: Identifying Cam Positions

   
10. 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.
    • Measure it in low lift cam for intake side.
    • Insert a thickness gauge in a direction as horizontal as possible with respect to the valve lifter.

    Valve clearance 

    Intake: 

    0.20 ⁺⁰⁰⁴ _{-0.06 mm}  (0.007 ⁺⁰⁰⁰¹⁶ _-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.
      Fig 6: Checking Valve Clearance

      
11. If necessary, adjust the valve clearance. < Ref. to ADJUSTMENT , Valve Clearance. >
12. Further turn the crank pulley clockwise and then measure the valve clearances again.
13. After inspection, install the related parts in the reverse order of removal.