To avoid engine stall out caused by air entering the fuel system do not drain fuel water separator while the engine is running.
97 ford 7 3 fuel heater replacement.
Basically drain the bowl remove the filter remove the wire connected to the heater in the bowl remove the two screws holding the center post and heater in pull out the old and put in the new heater connect the wire to the heater retighten the mounting screws that hold the post and heater in put the filter back in and or put the lid back on close up the drain valve cycle the key a couple of times to refill the fuel bowl with fuel and then you should be good to go.
Replace the defective fuel heater in your 1994 2003 ford 7 3l powerstroke with the bostech dec021210 fuel filter heating element.
Designed as a direct replacement the bostech fuel filter heating element restores proper function to your fuel system.
How to replace an obs 94 97 7 3 powerstroke mechanical fuel pump.
The drain tube is attached to the manual drain valve.
Place an appropriate container under the fuel filter fuel heater water separator drain tube to collect the drained fluid.
This video covers the general procedure required to replace the valley mounted mechanical l.