1. Visually inspect oil pump for wear or damage.
IMPORTANT: DO NOT disassemble engine oil pump
for flushing, inspection, or performing
wear checks. Individual components of
oil pump are not available through
service parts. Replace pump as a
Never hammer directly on oil pump
housing as it could cause binding of
2. Flush pump assembly internally with clean solvent to
remove oil. Spin pump gears to help remove solvent.
Pump gears should move freely.
IMPORTANT: To help insure accurate wear
measurements, be sure the oil pump is
clean and faces the same way as when
mounted on the cylinder block.
NOTE: Leave pump drive gear installed when making
3. Place oil pump on a work bench with pump-to-cylinder
block mounting surface facing upward (same as when
mounted on engine).