Valve Clearance: Adjustments
ADJUSTMENTHINT: Inspect and adjust the valve clearance when the engine is cold.
1. DRAIN ENGINE COOLANT
2. REMOVE INTAKE AIR CONNECTOR PIPE
3. REMOVE THROTTLE BODY AND INTAKE AIR CONNECTOR ASSEMBLY
a) Disconnect the accelerator cable from the throttle body.
b) Disconnect the engine wire clamp from the clamp bracket of the throttle body.
c) Disconnect the engine wire from the clamp on the throttle body bracket.
d) Disconnect these connectors and hoses:
(1) Accelerator pedal position sensor connector
(2) Throttle control motor connector
(3) Throttle position sensor connector
(4) Air assist hose from intake air connector
(5) PCV hose from intake air connector
(6) VSV connector for EVAP
(7) EVAP hose (from charcoal canister) from VSV for EVAP
(8) Vacuum hose (from No.2 vacuum pipe) from No.1 vacuum pipe
e) Remove the 2 nuts holding the throttle body bracket to the cylinder head.
f) Remove the 4 bolts and 2 nuts holding the intake air connector to the air intake chamber.
g) Disconnect these hoses, and remove the throttle body with the intake air connector and gasket:
(1) 2 water bypass hoses from throttle body
(2) Vacuum hose (from actuator for ACIS) from No.1 vacuum pipe.
4. REMOVE NO.3 TIMING BELT COVER
Using a 5 mm hexagon wrench, remove the 4 bolts, oil filler cap, timing belt cover and gasket.
5. REMOVE IGNITION COILS AND HIGH-TENSION CORD SET ASSEMBLY
6. REMOVE SPARK PLUGS
7. DISCONNECT ENGINE WIRE FROM CYLINDER HEAD COVERS
8. REMOVE CYLINDER HEAD COVERS
9. SET NO.1 CYLINDER TO TDC/COMPRESSION
a) Turn the crankshaft pulley and align its groove with the timing mark "0" of the No.1 timing belt cover.
NOTICE: Always turn the crankshaft clockwise.
b) Check that the timing marks of the camshaft timing pulleys are aligned with the timing marks of the No.4 timing belt cover.
If not, turn the crankshaft 1 revolution (360°).
10. INSPECT VALVE CLEARANCE
a) Check only those valves indicated in the illustration.
- Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
- Record the valve clearance measurements of those that are out of specification. They will be used later to determine the required replacement adjusting shim.
Valve clearance (Cold):
Intake 0.15 - 0.25 mm (0.006 - 0.010 inch)
Exhaust 0.25 - 0.35 mm (0.010 - 0.014 inch)
b) Turn the crankshaft pulley 1 revolution (360°), and align the groove with the timing mark "0" of the No.1 timing belt cover.
c) Check only the valves indicated as shown. Measure the valve clearance.
11. ADJUST VALVE CLEARANCE
a) Remove the adjusting shim.
- Turn the camshaft so that the cam lobe for the valve to be adjusted faces up.
- Turn the valve lifter with a screwdriver so that the notches are perpendicular to the camshaft.
- Insert SST (B) gently from the inside as shown in the illustration.
- Using SST (A), hold the camshaft as shown in the illustration.
SST 09248-55040 (09248-05410)
- Using SST (A), press down the valve lifter and place SST (B) between the camshaft and valve lifter. Remove SST (A).
SST 09248-55040 (09248~5410, 09248-05420)
HINT:
- Apply SST (B) at slight angle on the side marked with "7" or "9", at the position shown in the illustration.
- When the adjusting shim of the No.1 intake side replace, remove the No.2 or No.3 camshaft bearing cap, and insert SST as shown in the illustration.
- Using a small screwdriver and a magnetic finger, remove the adjusting shim.
b) Determine the replacement adjusting shim size according to the following formula or Charts:
- Using a micrometer, measure the thickness of the removed shim.
- Calculate the thickness of a new shim so the valve clearance comes within specified value.
T Thickness of used shim
A Measured valve clearance
N Thickness of new shim
Intake N = T + (A - 0.20 mm (0.008 inch))
Exhaust N = T + (A - 0.30 mm (0.012 inch))
- Select a new shim with a thickness as close as possible to the calculated values.
HINT: Shims are available in 17 sizes in increments of 0.050 mm (0.0020 inch), from 2.500 mm (0.0984 inch) to 3.300 mm (0.1299 inch).
c) Install a new adjusting shim.
- Place a new adjusting shim on the valve lifter, with imprinted numbers facing down.
- Press down the valve lifter with SST (A), and remove SST (B).
SST 09248-55040
12. REINSTALL CYLINDER HEAD COVERS
13. RECONNECT ENGINE WIRE TO CYLINDER HEAD COVERS
14. REINSTALL SPARK PLUGS
15. REINSTALL IGNITION COILS AND HIGH-TENSION CORD SET ASSEMBLY
16. REINSTALL NO.3 TIMING BELT COVER
a) Install the gasket to the timing belt cover.
b) Using a 5 mm hexagon wrench, install the timing belt cover with the 4 bolts.
Torque: 8.0 Nm (80 kgf-cm, 71 inch lbs.)
c) Install the oil filler cap.
17. REINSTALL THROTTLE BODY AND INTAKE AIR CONNECTOR ASSEMBLY
a) Install a new gasket to the air intake chamber.
b) Place the throttle body with the intake air connector on the cylinder head.
c) Connect these hoses:
- Vacuum hose (from actuator for ACIS) to No.1 vacuum pipe
- 2 water bypass hoses to throttle body
d) Install the 4 bolts and 2 nuts holding the intake air connector to the air intake chamber.
Torque: 28 Nm (280 kgf-cm, 21 ft. lbs.)
e) Install the 2 nuts holding the throttle body bracket to the cylinder head.
Torque: 21 Nm (210 kgf-cm, 15 ft. lbs.)
f) Connect these hoses and connectors:
- Air assist hose to intake air connector
- PCV hose to intake air connector
- EVAP hose (from charcoal canister) to VSV for EVAP
- Vacuum hose (from No.2 vacuum pipe) to No. 1 vacuum pipe
- Throttle position sensor connector
- Accelerator pedal position sensor connector
- Throttle control motor connector
- VSV connector for EVAP
g) Secure the engine wire with the clamp on the throttle body bracket.
h) Install the engine wire clamp with the clamp bracket of the throttle body.
i) Connect the accelerator cable to the throttle body.
18. REINSTALL INTAKE AIR CONNECTOR PIPE
19. REFILL WITH ENGINE COOLANT
20. START ENGINE AND CHECK FOR LEAKS