Valve Clearance: Testing and Inspection

Camshaft valve clearance
^ Perform this inspection as follows after removal, installation, or replacement of the camshaft or any valve related parts, or if there are any unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or noise).

1. Warm up the engine, then stop it.
2. Remove front RH engine under cover using power tool.
3. Remove the rocker cover using power tool.





4. Turn crankshaft pulley in normal direction (clockwise when viewed from front) to align TDC identification mark (without paint mark) with timing indicator.





5. At this time, check that the both intake and exhaust cam lobes of No. 1 cylinder face outside.
^ If they do not face outside, turn crankshaft pulley once more.








6. Measure valve clearances with a feeler gauge at locations marked "X" in the table below.
^ No.1 cylinder compression TDC.





^ Use a feeler gauge to measure the clearance between valve and camshaft.
Valve clearance standard:
Cold
Intake: 0.24 - 0.32 mm (0.009 - 0.013 in)
Exhaust: 0.26 - 0.34 mm (0.010 - 0.013 in)
Hot*
Intake: 0.304 - 0.416 mm (0.012 - 0.016 in)
Exhaust: 0.308 - 0.432 mm (0.013 - 0.017 in)

*Approximately 80°C (176°F)

CAUTION: If inspection was carried out with cold engine, check that values with fully warmed up engine are still within specifications.

7. Turn crankshaft one complete revolution (360°) and align mark on crankshaft pulley with pointer.








8. Measure valve clearances with a feeler gauge at locations marked "X" in the table below.
^ No.4 cylinder compression TDC.
^ If out of specifications, make necessary adjustment.