Valve Clearance: Testing and Inspection
CHECKINGCheck valve clearance while engine is cold and not running.
1. Remove ornament cover.
2. Remove air duct with air cleaner case, collectors, hoses, wires, harnesses, connectors and so on.
3. Remove intake manifold collectors.
4. Remove ignition coils and spark plugs.
5. Remove RH and LH rocker covers.
6. Set No. 1 cylinder at TDC on its compression stroke.
^ Align pointer with TDC mark on crankshaft pulley.
^ Check that valve lifters on No. 1 cylinder are loose and valve lifters on No. 4 are tight.
If not, turn crankshaft one revolution (360°) and align as above.
7. Check only those valves shown in the figure.
^ Using a feeler gauge, measure clearance between valve lifter and camshaft.
^ Record any valve clearance measurements which are out of specification. They will be used later to determine the required replacement valve lifter.
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)
8. Turn crankshaft 240° and align as above.
9. Set No. 3 cylinder at TDC on its compression stroke.
10. Check only those valves shown in the figure.
11. Turn crankshaft 240° and align as above.
12. Set No. 5 cylinder at TDC on its compression stroke.
13. Check only those valves shown in the figure.
14. If all valve clearances are within specification, install the following parts. If they are out of specification, adjust the valve clearances.
^ Intake manifold collectors
^ RH and LH rocker covers
^ All spark plugs
^ All ignition coils