To disassemble the 2.4L DOHC engine, remove the camshafts first, then remove the rocker arms. If the Valve Lifters are still in the head, lift them out, ensuring you keep them in order. Check each Valve Lifter for wear and damage particularly on the ball tip that contacts the rocker arm. If there are concerns about condition or if valve "tapping" noises are happening consider replacing them. Partially filling the Valve Lifters with engine oil will show that plunger doesn't move much when pressed. If the plunger's travel is excessive, immerse the Valve Lifter in clean engine oil, then pump the plunger until the travel is eliminated; if it still travels when full of oil, replace it. After replacing the Valve Lifters, expect tapping sounds when the engine is restarted. If the noise persists after warming up the machine when it has been set at 3000 rpm for 1 minute, change the faulty adjusters. The Valve Lifter on the 2.4L SOHC engine is a part of each rocker arm and cannot be replaced. Detach the rocker arm shafts without removing the rocker arms. Examine each Valve Lifter for signs of wear and damage especially at the surface which contacts the valve tip. If in doubt, or if valve "tapping" noise is evident, consider replacing the complete rocker arm/Valve Lifter. If Valve Lifters were removed, refit rocker arms onto their shafts. It's recommended to partially fill the Valve Lifters with engine oil. If you see excessive plunger travel, fully submerge the rocker arm assembly in quality engine oil. Then, pump the plunger until the excessive travel has been eliminated. If it travels when completely full of oil, then replace it. Once the rocker arm/Valve Lifters have been replaced, restart the engine. You should hear some "tapping" noises. After warm-up, run the engine at 3,000 rpm for one minute; if the noises do not stop, replace the defective assemblies.