Fuel Filter Drain?
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New User
Joined: Jul 2006
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Fuel Filter Drain?
I am running a 6.9 F250 with after market fuel filter(NAPA). I keep reading about a fuel filter drain, but my fuel filter doesn't have a drain-it is like a miniature spin on oil filter. I do have a fuel/water separator mounted on the driver's side firewall that has a plunger that you pull up to drain the water of the separater but my fuel filter just spins onto the mounting body. Should I be getting a special fuel filter with buildt in drain mechanism? Please advice.
Fleet Mechanic
Joined: Sep 2005
Posts: 1,509
Likes: 3
From: Ladner, British Columbia
The 7.3l motors have a combined water separator/fuel filter which has a little wheel at the bottom of the bowl you can turn to drain water. The early 6.9l motors had the water separator with the pull chain like you have.
Lots of guys have had problems with the 6.9l water separator leaking air into the fuel system and have bypassed them or upgraded them to the 7.3l system.
The 7.3l motors have the filter after the fuel lift pump and are less suseptable to this problem.
That said I don't like either OEM fuel filter/water separator system and am a fan of the 2 micron filtration "Racor" Water Separator / Fuel Filter system (Model R45S)
I upgraded my 93' the same year I bought the truck. I upgraded my recently bought 91' to a Racor system last weekend as I got tired of air leaking into the separator thru the drain valve which has a piece of dirt stuck in the seat.
Sounds like somebody added an inline fuel filter after your waterseparator. To bad they did not go all the way and install a combination water separator/fuel filter like the Racor.
Seb.....
Lots of guys have had problems with the 6.9l water separator leaking air into the fuel system and have bypassed them or upgraded them to the 7.3l system.
The 7.3l motors have the filter after the fuel lift pump and are less suseptable to this problem.
That said I don't like either OEM fuel filter/water separator system and am a fan of the 2 micron filtration "Racor" Water Separator / Fuel Filter system (Model R45S)
I upgraded my 93' the same year I bought the truck. I upgraded my recently bought 91' to a Racor system last weekend as I got tired of air leaking into the separator thru the drain valve which has a piece of dirt stuck in the seat.
Sounds like somebody added an inline fuel filter after your waterseparator. To bad they did not go all the way and install a combination water separator/fuel filter like the Racor.
Seb.....
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New User
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To my knowledge the fuel filter is stock. It is located between the fuel pump and the injecter pump behind the alternater. There is a steel line from the pump to the filter and another steel line from the filter to the injecter pump with a rubber return hose back to the filter. Still Not sure about the fuel filter drain; does the Racor system utilize the drain from the fuel filter?
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
The drain is to let the water out of the water seperator. Since the 86 and earlier 6.9's had a seperator on the firewall, the drain is located there.
The 87 6.9 and all the 7.3's used a combo filter seperator so the drain is located on the bottom of the filter.
Yes the firewall mounted seperator was bad about leaking air, but fuel filters were five bucks.
The 7.3 style works better, but the replacement filter cartidge is 19.95.
The 87 6.9 and all the 7.3's used a combo filter seperator so the drain is located on the bottom of the filter.
Yes the firewall mounted seperator was bad about leaking air, but fuel filters were five bucks.
The 7.3 style works better, but the replacement filter cartidge is 19.95.
