For 1990-2009 cars

1. Measure the camshaft lift. Refer to Engine Mechanical Specifications.
2. Replace the camshaft if the measured value is not as specified.
3. Measure the outer diameter of each journal at the 4 different places. Refer to Engine Mechanical Specifications.
4. Replace the camshaft if the measured value is not as specified.
5. Measure the inner diameter of the cylinder head journal at the 2 places. Refer to Engine Mechanical Specifications.
6. If necessary, replace the cylinder head.