1. Remove the lower intake manifold. Refer to Intake Manifold Replacement .
2. Remove the valve rocker arms and the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
3. Remove the valve lifters. Refer to Valve Lifter Removal .
4. Use a cleaning solvent and a shop towel to clean any varnish from the valve lifter bores.
5. Inspect the valve lifter bores for excessive wear or scoring. Replace the engine block if there is excessive wear or deep scoring.
6. Inspect the camshaft for wear or damage. If the wear is questionable remove the camshaft and inspect. Refer to Crankshaft and Bearing Cleaning and Inspection .
7. Clean and inspect the valve lifters and the valve pushrod guide. Refer to Valve Lifters and Guides Cleaning and Inspection .

Important: It is normal for NEW lifters to make a slight ticking noise when the engine is first started. Increasing the engine RPMs slightly to raise oil pressure should stop the noise.

1. Install the valve lifters. Refer to Valve Lifter Installation .
2. Install the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
3. Install the lower intake manifold. Refer to Intake Manifold Replacement .