For 1990-2009 cars

Inspect the following areas:

• | Inspect the valve lifter and valve stem tip mating surfaces. These surfaces should be smooth and free of scoring or other damage.

• | Inspect the valve lifters for scoring where it contacts the camshaft.

• | Inspect the camshaft journals, lobes, and camshaft housing bores for wear or scoring.

• | Timing chain for teeth that are no longer concentric

• | The camshaft gears and mating surfaces for damage or signs of movement

• | The key and crankshaft keyway for wear

• | The timing chain for binding or excessive wear