Pretty major undertaking. Taking it out is a lot easier than putting it back IN however. You should start by picking up a comprehensive mechanic's manual for that make/model.
On a 1996 Ford Aerostar , 4.0 liter V6 engine : The oil pressure sending unit for the oil pressure gauge is on the drivers side of the engine below the power steering pump
Bank 1 is the passenger side of your engine in a 1996 Ford Aerostar
According to the ( 1996 ) Ford Aerostar Owner Guide : With engine oil filter change : The 4.0 liter V6 engine takes : ( 5.0 U.S. quarts / 4.7 liters ) * 5W-30 is the PREFERRED oil
No , both the 3.0 and 4.0 liter Over Head Valve ( OHV ) engines used in a 1996 Ford Aerostar use ( 1 ) timing CHAIN
Look at the lower rear end of the engine
According to my Haynes repair manual : For the 4.0 liter OHV / pushrod style engine used in a 1996 Ford Explorer : ( YES , in order to remove the timing chain cover you have to remove the oil pan , which involves removing the engine from the vehicle )
Either the 3.0 liter VULCAN engine or the 3.0 liter DURATEC engine
Not even close
The PCM ( Powertrain Control Module ) will limit the RPM of the engine in order to protect the engine ( on the 4.0 liter V6 engine it starts to cut back on the fuel at 5200 RPM ) when it is in gear and I believe around 3000 RPM in neutral or park when there is no load on the engine
You could have a 2.3 liter - 4 cylinder engine , a 3.0 liter - V6 engine , or a 4.0 liter V6 engine
No , the 1996 Ford Explorer ( 4.0 liter V6 engine and the 5.0 liter V8 engine ) has a timing CHAIN
No , according to the Gates website ( they make timing belts etc. ) the 1.9 liter engine in a 1996 Mercury Tracer is NOT an interference engine