1. Remove the valve cover. The valve cover is located on the top of the engine, and is held in place by several bolts. Remove the bolts and lift the valve cover off of the engine.
2. Locate the valve clearances. The valve clearances are located between the rocker arms and the valves. There are two clearances to check, the intake valve clearance and the exhaust valve clearance. The intake valve clearance should be 0.006-0.008 inches, and the exhaust valve clearance should be 0.010-0.012 inches.
3. Adjust the valve clearances. If the valve clearances are not within the specified range, they must be adjusted. To adjust the valve clearances, use a feeler gauge to measure the clearance between the rocker arm and the valve. If the clearance is too small, loosen the locknut on the rocker arm and turn the adjusting screw until the clearance is correct. If the clearance is too large, tighten the locknut on the rocker arm and turn the adjusting screw until the clearance is correct.
4. Repeat steps 2 and 3 for all of the valves.
5. Replace the valve cover. Replace the valve cover on the engine and secure it with the bolts.
Note: The valve clearances should be checked every 30,000 miles.
