On the block itself, there are multiple locations.
The freeze plugs on the 1994 Ford Ranger have locations that vary slightly depending on the engine choice. On most trucks the freeze plugs are on the engine block below where the spark plugs are located.
There are two, located in the Y-pipe. They are just down from the manifolds. The connector plugs are located above the bellhousing behind the cylinder heads.
They are located on the front, back, and transmission sides of the engine.They are located on the front, back, and transmission sides of the engine.
It has 8 if it is a V-8 engine.
The ( 2 ) engine , cylinder heads , are on each side of your V6 engine where the spark plugs are - just look for where the spark plug wires connect to the spark plugs
Sides of the block, 6 total.
There are numerous freeze plugs. There are some in the cylinder heads. There are some on the side of the engine block and on the rear of the engine behind the flywheel. You will need to pressure test the cooling system to find the leak.
The spark plug gap for a 1994 Ford Explorer with the 4.0 L OHV motor is .052 to .056 range - Chilton repair manual shows .054
low compression in one of your cylinders
if you can't find the plugs you have know business working on this car.
Inside fuel tank
it is located under the drivers side seat