Your car or truck will begin losing pressure(meaning you will not be able to drive forward in a normal speed)
No oil pressure - after checking with a manual gauge
You can pressure test with a gauge using sensor location
No, if you have oil in your oil pan, you have other problems. It has nothing to do with your water pump going out or being bad.
Oil pressure test. If you have a gage it should read around 40 psi when hot.
The oil pump rattling is very unlikely, a bad pump causing other components to rattle and damage themselves is VERYlikely.
You have a bad oil pump.
Loss of oil pressure.
If you have oil pressure it is working.
You can tell if your fuel pump shutoff switch is bad, if the fuel pump does not shut off when you flip the switch. You can also tell if the switch is bad by looking at the wire connections.
Loss of oil pressure.
No oil pressure.
From the easiest to the hardest oil in oil pan,bad oil gauge, bad oil pump bad cam or crank bearings.