For 1990-2009 cars

Inspect the following areas:

• | Inspect the valve rocker arms and ball at the mating surfaces. These surfaces should be smooth and free of scoring or other damage.

• | Inspect the valve rocker arms and the mating surfaces. These surfaces should be smooth and free of scoring or other damage.

• | Inspect the valve rocker arm valve pushrod sockets and valve stem mating surfaces. These surfaces should be smooth with no scoring or exceptional wear.

• | Inspect the valve pushrods for scored ends or bends.

• | Inspect the camshaft and crankshaft sprockets.

• | Inspect the key and crankshaft keyway for wear.

• | Inspect the crankshaft timing chain for binding.

1. | Set the J 8520 on zero.

2. | Slowly rotate the crankshaft until the valve pushrod is raised fully.

3. | Compare the total lift shown on the J 8520 with the specifications.

4. | Remove the J 8520 .