For 1990-2009 cars

1. Inspect the following components for 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's outer gear and the oil pump body using a feeler gauge.

Replace the oil pump's outer gear and/or 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 straight edge using a feeler gauge.

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