You don't. If you have the ability, rebuild it with new parts. You'll have a great sense of pride when you are finished.
yes
for towing and heavy-duty use.
yes. In order for the engine to run, it needs both O2 and gas. If it doesnt get one or the other, it wont run
what's Inside a Car Engine insdie a car engine are many types off items like there are as the following crank shaft,conrod,piston+rings,bearings,cam chains,oil pump,bushes,gaskets,valves,for petrol...