How to replace oil pump on a 1996 Aurora - Cars & Trucks

Sorry but why?> post symptoms first?
Aurora. ok
ah.
its really a Oldsmobile Aurora
what engine, ??? 4.0L i think this car is the rare 1 engine car.......

Here is the removal, i skipped put back,,, lazy i am.

1. Disconnect the negative battery cable.
2. Install an engine support fixture, J-28467-A or the equivalent.
3. Remove the engine mount-to-body through bolt nut and through bolt.
4. Remove the through bolt nut and bolt from the engine side of the mount.
5. Raise and safely support the vehicle.
6. Remove the front tire and wheel assembly.
7. Remove the right inner fender well splash shield.
8. Remove the lower center air deflector.
9. Remove the left transaxle mount-to-frame through bolt.
10. Remove the lower retaining bolt and nut from the engine mount bracket.
11. Remove the bolt and disconnect the power steering line retainer from the bracket.
12. Lower the vehicle.
13. Remove the upper retaining nut and bolt from the engine mount bracket.
14. Remove the serpentine belt from the power steering pump pulley.
15. Remove the fuel plastic sight shield on the intake manifold.
16. Remove the power steering pump from the mounting bracket and set aside. DO NOT disconnect the power steering lines from the pump.
17. Raise the engine using the support fixture.
18. Remove the engine mount bracket from the engine.
19. Remove the torque axis mount from the frame rail.
20. Lower the engine using the support fixture until clearance for J-38416-B, or an equivalent puller is attained.
21. Raise and safely support the vehicle.
22. Remove the crankshaft balancer retaining bolt.
23. Remove the crankshaft balancer using J-38416-B.
24. Remove the serpentine belt tensioner.
25. Remove the serpentine belt idler pulley.
26. Remove the front cover bolts and remove the cover and gasket. DO NOT discard the gasket, if it is undamaged it can be re-used.
27. Remove the 3 oil pump mounting bolts and remove the oil pump and drive spacer.
28. If necessary, disassemble and inspect the pump as follows:
    • Remove the drive spacer from the pump housing.
    • Remove the 2 screws holding the pump housing halves together.
    • Remove the inner (drive) and outer (driven) rotors from the housing. Indicate the mating surfaces (dimples).
    • Remove the pressure relief valve.
    • Inspect the pump housing for nicks, burrs, chips or debris that might cause a leak or binding condition in the rotor pocket.
    • Inspect the drive and driven rotors for nicks or burrs.
    • Check the pump cover and interior surface for excessive wear or score marks. Check for flatness.
    • If any components show signs of excessive wear or damage, replace the pump assembly.