Valve Clearance: Adjustments

Adjusting Shim Selection Chart (Intake):

Adjusting Shim Selection Chart (Exhaust):

VALVE CLEARANCE
ADJUSTMENT
1. DISCONNECT BATTERY NEGATIVE TERMINAL
2. DRAIN ENGINE COOLANT
3. REMOVE FRONT FENDER APRON SEAL RH
4. REMOVE FRONT SUSPENSION UPPER BRACE CENTER (W/O TEMS)
5. REMOVE V-BANK COVER SUB-ASSEMBLY
6. REMOVE AIR CLEANER CAP SUB-ASSEMBLY
7. REMOVE EMISSION CONTROL VALVE SET
8. REMOVE INTAKE AIR SURGE TANK
9. REMOVE RADIATOR HOSE INLET
10. REMOVE IGNITION COIL ASSEMBLY





11. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY
a. Remove the 2 engine wire harness clamps.
b. Remove the 3 nuts, then disconnect the engine wire harness.
c. Remove the 9 bolts and cylinder head cover.





12. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY LH
a. Using an E6 Torx socket wrench, remove the 2 bolts and disconnect the engine wire harness protector.
b. Remove the 9 bolts and cylinder head cover.





13. INSPECT VALVE CLEARANCE
a. Turn the crankshaft pulley, then align the timing notch with the timing mark "0" of the timing belt No. 1 cover.
b. Check that the valve lifters on the intake side of the No. 1 cylinder are not pushed by the cam.
If the valve lifters are pushed, turn the crankshaft by 1 revolution (360°) and align the marks as above.





c. Inspect the valves indicated in the illustration on the left.
1. Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
Valve clearance (Cold):
0.15 to 0.25 mm (0.0059 to 0.0098 inch)for intake
0.25 to 0.35 mm (0.0098 to 0.0138 inch)for exhaust
2. Record the out-of-specification valve clearance measurements. They will be used later to select an adjusting shim to replace.





d. Turn the crankshaft by 2/3 of a revolution (240°), then inspect the valves indicated in the illustration on the left.
1. Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
Valve clearance (Cold):
0.15 to 0.25 mm (0.0059 to 0.0098 inch)for intake
0.25 to 0.35 mm (0.0098 to 0.0138 inch)for exhaust
2. Record the out-of-specification valve clearance measurements. They will be used later to select an adjusting shim to replace.





e. Turn the crankshaft by 2/3 of a revolution (240°), then inspect the valves indicated in the illustration on the left.
1. Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
Valve clearance (Cold):
0.15 to 0.25 mm (0.0059 to 0.0098 inch)for intake
0.25 to 0.35 mm (0.0098 to 0.0138 inch)for exhaust
2. Record the out-of-specification valve clearance measurements. They will be used later to select an adjusting shim to replace.
14. ADJUST VALVE CLEARANCE





a. Turn the camshaft so that the cam lobe faces upward.
b. Turn the valve lifter with a screwdriver so that the notches are perpendicular to the camshaft.





c. Using SST (A), press down the valve lifter and place SST (B) between the camshaft and valve lifter. Remove SST (A).
SST 09248-55040 (09248-05410, 09248-05420)





HINT:
^ Apply SST (B) at a slight angle on the side marked with "9" or "7" at the position shown in the illustration.
^ When SST (B) is inserted too deeply, it will get pinched by the shim. To prevent SST (B) from getting stuck, insert it gently from the intake side at a slight angle.





d. Using a small screwdriver and magnetic finger, remove the adjusting shim.





e. Using a micrometer, measure the thickness of the removed shim.





f. Calculate the thickness of a new shim so that the valve clearance comes within the specified value.
Specified value (Cold):
Intake A = B + (C - 0.20 mm (0.0079 inch))
Exhaust A = B + (C - 0.30 mm (0.0118 inch))





g. Select a new shim with a thickness which is as close to the calculated values as possible.

HINT
^ Shims are available in 17 sizes in increments of 0.05 mm (0.0020 inch), from 2.50 mm (0.0984 inch)to 3.30 mm (0.1299 inch).

Adjusting Shim Selection Chart (Intake):

Adjusting Shim Selection Chart (Exhaust):

h. Place a new adjusting shim on the valve lifter with the imprinted number facing down.
i. Press down the valve lifter with SST (A), then remove SST (B).
SST 09248-55040 (09248-05410, 09248-05420)
j. Recheck the valve clearance.





15. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY
a. Apply seal packing to the cylinder head as shown in the illustration.
Seal packing: Part No. 08826-00080 or equivalent

NOTICE:
^ Remove any oil from the contact surface.
^ Install the cylinder head cover within 3 minutes after applying seal packing.
^ Do not start the engine within 2 hours after installing.

b. Install the cylinder head cover with the 9 bolts. Tighten the bolts uniformly in several steps.
Torque: 8.0 Nm (80 kgf-cm, 71 inch lbs.)
c. Install the engine wire harness with the 3 nuts.
Torque: 8.4 Nm (85 kgf-cm, 74 inch lbs.)





16. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY LH
a. Apply seal packing to the cylinder head as shown in the illustration.
Seal packing: Part No. 08826-00080 or equivalent

NOTICE:
^ Remove any oil from the contact surface.
^ Install the cylinder head cover within 3 minutes after applying seal packing.
^ Do not start the engine within 2 hours after installing.

b. Install the cylinder head cover with the 9 bolts. Tighten the bolts uniformly in several steps.
Torque: 8.0 Nm (80 kgf-cm, 71 inch lbs.)
c. Using an E6 Torx socket wrench, install the engine wire harness protector with the 2 bolts.
Torque: 8.4 Nm (85 kgf-cm, 74 inch lbs.)
17. INSTALL IGNITION COIL ASSEMBLY
Torque: 8.0 Nm (80 kgf-cm, 71 inch lbs.)
18. INSTALL INTAKE AIR SURGE TANK
19. INSTALL EMISSION CONTROL VALVE SET
20. INSTALL AIR CLEANER CAP SUB-ASSEMBLY
21. CHECK CONNECTION OF VACUUM HOSE
22. INSTALL V-BANK COVER SUB-ASSEMBLY
23. INSTALL FRONT SUSPENSION UPPER BRACE CENTER (W/O TEMS)
24. ADD ENGINE COOLANT
25. CHECK FOR ENGINE COOLANT LEAKS
26. SYSTEM INITIALIZATION