What is this on my 1984 6.9 idi
- Thread starter Danielson
- Start date
Well, my guess is your truck is an 83-86, maybe an 87, but that is the water separator used along with the 6.9 style fuel filter, with no heater in the header, and no aluminum bowl on the bottom of the filter. This is mounted on the firewall over by the brake booster, correct?
Most times it's bypassed because the first time the ring is pulled to drain the water, it causes a constant air leak. Take a picture of the fuel filter and header, it may have been swapped out with a 7.3 style header and filter, that has the built in water separator. Hopefully that's what's been done, otherwise if this has just been bypassed and if the factory 6.9 filter is still being used, and not other added filters, then you have no water separator in your fuel system.
Most times it's bypassed because the first time the ring is pulled to drain the water, it causes a constant air leak. Take a picture of the fuel filter and header, it may have been swapped out with a 7.3 style header and filter, that has the built in water separator. Hopefully that's what's been done, otherwise if this has just been bypassed and if the factory 6.9 filter is still being used, and not other added filters, then you have no water separator in your fuel system.
Yes, it is important. It's a fuel water separator. If water gets into the IP/Injectors it can destroy them. They get bypassed because they cause an air leak, which causes the fuel in the fuel system to drain back to the tank and make it very difficult to start.
Oledirtypearl86
Full Access Member
It's the fuel water separator on the driver side fire wall it's important you need a separator to avoid issues down the road
It’s important but a poor design. There’s a lot of aftermarket fuel water separators that will perform the same job better and more reliably.
Oledirtypearl86
Full Access Member
Worst case you get a bunch of water in your fuel your truck runs like crap and the water rusts and gums up everything the injection pump, injectors . A water separator is always worth the few bucks plus you can hook it up and if it's leaking out the drain tube put a bolt in the drain tube with a hose clamp making sure it seals good
I'd pull it off the firewall and the throw it in the trash. Never seen one that isn't bypassed. Notorious for air/fuel leaks.
I'd either get a 7.3 filter head with the water separator bowl/filter (what I use)..... or grab an aftermarket fuel filter with a water separator. I don't know which part numbers will work on the 6.9 filter head, but I know they are available.
Heath
I'd either get a 7.3 filter head with the water separator bowl/filter (what I use)..... or grab an aftermarket fuel filter with a water separator. I don't know which part numbers will work on the 6.9 filter head, but I know they are available.
Heath
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Something like this.
Heath
FordGuy100
Registered User
This is a special device used nowadays to introduce massive amounts of air into the fuel system causing the engine to stumble while running in the most inopportune times.
nitroguy
Full Access Member
Nice! Is this the actual one to use (as in, Google the part number and Buy Now?). Asking "for a friend". Who has an 84. With a bypassed separator.
Frstdiesel
Full Access Member
Yes please post if this unit will fit a factory 1984 filter head.
I see it's a 2 micron filter.
I was contemplating a set-up like this.
I see it's a 2 micron filter.
I was contemplating a set-up like this.
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