Depends on which fuel/water separator you have. If you have a Davco primary filter, look underneath the housing... there'll be an "L" shaped plastic knob... rotate it downwards to open the draincock. If you have a primary fuel filter with a snap-on plastic cap underneath it, there'll be a draincock on the bottom of it... rotate it counterclockwise (looking at it from the bottom) to open the draincock. Remember to leave the key in the "OFF" position as you do this (or just take it out of the ignition).
you need a 15mm alan wrenchnand theres a plug on the side of the seperator under the drivers seat
I am going to assume this is a diesel fuel water separator assembly. Install it in the fuel system as per the instructions contained in the package. Check and drain it on a regular basis. I drain mine every tank of fuel if I am unsure about the quality of fuel I am getting.
if it is a diesel it is built in to the fuel filter that is on top of the engine. on the 7.3l there is a yellow lever on the back of the housing that you can drain the water/fuel from it
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Detroit Diesel was created in 1938.
Little yellow lever (valve) on left side near bottom of fuel filter housing. Push lever and fuel will drain out of hose near bottom of truck.
The separator is valve handle is on the firewall side of the fuel canister
Located in front of the fuel filter you will find a yellow lever-like switch if you rotate the switch clockwise it will drain the fuel-water separator.
Diesel fuel is hygroscopic and absorbs water. It's not unusual for diesel vehicles to have water in the fuel. Use a fuel conditioner and water remover, and use the water separator drain if it has one.
IF IT IS DIESEL YOU PROBABLY NEED TO DRAIN THE WATER SEPARATOR LOCATED ON THE TOP OF THE MOTOR UNDER A PLASTIC COVER ON THE INTAKE MANIFOLD
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Yellow lever attached to back of fuel filter in "V" of engine, the drain hose ends on front passenger side of block, under a heater hose, it drains about 6 to 8 ounce of fuel when drain is opened, and you want to catch the fuel in a clean jar to see if it has water. You may have to drain it a few times to get all the water out. Start engine between draining of separator, and make sure to close the drain valve after each draining. The water in fuel light should reset it's self.