Valve Clearance: Testing and Inspection
Valve ClearanceCHECKING
Perform inspection as follows after removal, installation or replacement of camshaft or valve related parts, or if there is unusual engine conditions regarding valve clearance.
NOTE: Check valve clearance while engine is cold and not running.
1. Remove the intake manifold collectors. Refer to "REMOVAL".
2. Remove the ignition coils. Refer to "REMOVAL".
3. Remove the spark plugs. Refer to "REMOVAL".
4. Remove the rocker covers. Refer to "REMOVAL".
5. Set No.1 cylinder at TDC on its compression stroke.
^ Align pointer with TDC mark on crankshaft pulley.
^ Check that the valve lifters on No.1 cylinder are loose and valve lifters on No.4 are tight. If not, turn the crankshaft one full revolution (360°) and align as shown.
6. Check only the valves as shown.
^ Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
^ Record any valve clearance measurements which are out of specification. They will be used later to determine the required replacement lifter size.
Valve Clearance for Checking (cold)
Intake : 0.26 - 0.34 mm (0.010 - 0.013 inch)
Exhaust : 0.29 - 0.37 mm (0.011 - 0.015 inch)
7. Turn crankshaft 240°.
8. Set No.3 cylinder at TDC on its compression stroke.
9. Check only those valves as shown.
10. Turn the crankshaft 240° and align as above.
11. Set No.5 cylinder at TDC on its compression stroke.
12. Check only those valves as shown.
13. If all valve clearances are within specification, install the following components. If the valve clearances are out of specification, adjust the valve clearances.
^ Rocker covers. Refer to "INSTALLATION".
^ All spark plugs. Refer to "INSTALLATION".
^ All ignition coils. Refer to "INSTALLATION".
^ Intake manifold collectors. Refer to "INSTALLATION".