For 1990-2009 cars

1. Inspect the following items for the excessive wear or for damage:

• | The oil pump outer gear (1).

• | The oil pump inner gear (2).

• | The oil pump cover

• | The oil pump body

• | The pressure relief valve

2. Measure the radial clearance between the oil pump outer gear and the body of the oil pump using a feeler gauge.

Replace the outer gear of the oil pump and/or of the oil pump if the clearance exceeds 0.310 mm (0.0122 in).

3. Measure the side clearance between the oil pump gears and a straightedge using a feeler gauge.

Replace the gears if the clearance exceeds 0.15 mm (0.0059 in).