Oil Pump Cleaning and Inspection for Chevrolet Metro 1998

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

•	The oil pump outer gear

•	The oil pump inner gear

•	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 oil pump body using a feeler gage.

Replace the oil pump outer gear and/or 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 gage.

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