Valve Clearance: Adjustments
Valve Shim Selection Chart (Intake)
Valve Shim Selection Chart (Exhaust)
ADJUSTMENT
1. REMOVE ENGINE UNDER COVER RH
2. REMOVE CYLINDER HEAD COVER NO.2
a) Remove the 3 bolts and nut, then remove the cylinder head cover No. 2.
3. DISCONNECT BATTERY NEGATIVE TERMINAL
4. REMOVE WIRE HARNESS PROTECTOR
5. SEPARATE SUCTION HOSE SUB-ASSEMBLY
6. REMOVE AIR SWITCHING VALVE ASSEMBLY
7. REMOVE FAN AND GENERATOR V BELT
8. REMOVE GENERATOR BRACKET NO. 1
9. REMOVE GENERATOR ASSEMBLY
10. REMOVE IGNITION COIL ASSEMBLY
11. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY
12. SET NO. 1 CYLINDER TO TDC/COMPRESSION
13. INSPECT VALVE CLEARANCE
a) Check only the valves indicated.
1) Using a feeler gauge, measure the clearance between the valve rocker arm and camshaft.
2) Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement adjusting shim.
Valve clearance (Cold)
b) Turn the crankshaft 1 revolution (360°) to set the No. 4 cylinder to the TDC/compression.
c) Check only the valves indicated.
1) Using a feeler gauge, measure the clearance between the valve rocker arm and camshaft.
2) Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement adjusting shim.
Valve clearance (Cold)
14. ADJUST VALVE CLEARANCE
a) Set SST.
1) Turn the crankshaft so that the related rocker arm, where the valve clearance is adjusted, is fully pushed down.
NOTICE: Remove the spark plug, then take off the compression.
2) Insert SST into the plug tube.
SST 09248-77010 (09248-07010)
NOTICE:
^ SST cannot be inserted unless the set screw is loosened.
^ Make sure that the camshaft is in the same condition as step (1).
3) Operate the lever so that the SST seat surface comes into contact with the valve retainer, then lock them with the 2 set screws.
NOTICE:
^ Clearance between the valve retainer and SST seat surface is not allowed.
^ Be careful not to make clearance when inserting SST, since a presence of clearance may unlock the keeper.
4) Lock the set screw on the plug tube side of SST.
5) Turn the crankshaft so that the camshaft is positioned as shown in the illustration.
NOTICE:
^ Take care of the rotation direction to prevent the camshaft lobe from interfering with the SST shaft.
^ Do not turn the crankshaft excessively.
b) Remove the adjusting shim.
1) Lift the rocker arm to make room, then remove the adjusting shim using SST.
SST 09248-77010 (09248-07010)
NOTICE: Do not remove SST with the adjusting shim removed.
HINT:
^ Setting SST from the upper right makes the removal easier.
^ If there is not enough room, reset SST.
2) Determine the size of the replaced shim according to the formulas or charts:
^ Using a dial indicator, measure the thickness of the removed shim.
^ Calculate the thickness of a new shim so that the valve clearance comes within the specified value.
Intake: A = B + (C - 0.13 mm (0.005 inch)) x 1.5
Exhaust: A = B + (C - 0.27 mm (0.011 inch)) x 1.5
HINT: Shims are available in 41 sizes in increments of 0.020 mm (0.0008 inch), from 2.000 mm (0.0787 inch) to 2.800 mm (0.1102 inch).
c) Using SST, lift the rocker arm to make room, then install the adjusting shim.
HINT:
^ Setting SST from the upper right makes the removal easier.
^ To remove SST from the adjusting shim, it is advisable to push the rocker arm down.
d) Turn the crankshaft so that the related rocker arm, where the valve clearance is adjusted, is fully pushed down.
NOTICE:
^ Take care of the rotation direction to prevent the camshaft lobe from interfering with the SST shaft.
^ Do not rotate the crankshaft excessively.
e) After loosening the 2 set screws of SST, remove SST itself.
SST 09248-77010 (09248-07010)
15. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY
16. INSTALL IGNITION COIL ASSEMBLY
Torque: 9.0 Nm (92 kgf-cm, 80 inch lbs.)
17. INSTALL GENERATOR ASSEMBLY
18. INSTALL GENERATOR BRACKET NO. 1
19. INSTALL AIR SWITCHING VALVE ASSEMBLY
20. INSTALL SUCTION HOSE SUB-ASSEMBLY
Torque: 9.8 Nm (100 kgf-cm, 87 inch lbs.)
21. CONNECT BATTERY NEGATIVE TERMINAL
Torque: 3.5 Nm (36 kgf-cm, 31 inch lbs.)
22. CHECK FOR ENGINE OIL LEAKAGE
23. INSTALL CYLINDER HEAD COVER NO.2
Torque: 7.0 Nm (71 kgf-cm, 62 inch lbs.)