It's not easy to be absolutely sure because it may possibly have got worn if it's been allowed to run without oil. However, this is unlikely, so I would suggest you would not have to replace for this reason.
I would definitely replace the water pump, cleaning it could result in serious health issues
Bad Head Gasket or Cracked Block (rare)
Idler and tensioner pulleys, cam and crank oil seals and pays to do water pump also if it is driven from the timing belt.
Belt, tensioner, idler pulley, H2O pump, camshaft oil seal, crankshaft oil seal, oil pump drive seal and gaskets.
The oil pump may be changed when the oil level light begins to glow. Buy the oil pump from the eBay motors and it will be replaced.
Can the oil pump be replaced on 1994 Ford Ranger 4.0 without pulling motor?
No oil pressure
Deep inside the engine. If your oil pump has problems, you need to have your engine replaced.
Timing belt tensioner, and its spring. Oil seals for both camshaft and crankshaft. And it's highly recommended to replace the water pump.
It does not have a fuel pump symbol. You are mistaken it with oil pressure symbol. If you have that light on, it means that oil pressure inside of your engine is very low. It's a major problem and you should not drive your car until you fix it. There are basically three main reasons for that. First is your oil pump has to be replaced. Second is you do not have enough oil and some oil has to be added. And third is the oil filter is clogged and has to be replaced along with oil.
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.
The water pump and cam are driven by the same belt. The oil pump has no relation to these.