Description
Overview
The iFJF 68268285AC Fuel Water Separator Assembly is a direct OEM-grade replacement for the chassis-mounted fuel filter housing on 2013-2018 Ram 2500, 3500, 4500, and 5500 trucks equipped with the 6.7L Cummins Turbo Diesel engine. This complete assembly includes the integrated primer pump, water-in-fuel (WIF) sensor connector, drain valve, and mounting bracket — everything you need for a drop-in replacement.
Water contamination is the #1 cause of premature injector failure in modern diesel engines. The high-pressure CP4.2 injection pump and piezo injectors in the 6.7L Cummins have extremely tight clearances — even a few drops of water passing through can cause catastrophic damage ($4,000-$8,000 repair cost). This separator assembly ensures reliable water separation and fuel filtration at every fill-up.
Key Features
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Complete Assembly — Includes filter housing, primer pump, WIF sensor port, drain valve, and mounting bracket — pre-assembled
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OEM-Grade Construction — Manufactured to OE specifications with high-grade composite materials resistant to diesel fuel and biodiesel blends
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Integrated Primer Pump — Makes fuel system priming after filter changes fast and tool-free — no more cranking the starter
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WIF Sensor Port — Direct plug-and-play with factory water-in-fuel sensor for dashboard water detection warning
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Easy Drain Valve — Accessible drain port allows quick water purging during routine maintenance without removing the filter
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Protects $4,000+ Fuel System — Effective water separation prevents catastrophic CP4.2 pump and injector failure
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Direct Cross-Reference — Replaces Mopar 68268285AC, 68197866AA, 68197866AB, 68197866AC, 68268285AB
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Chassis-Mounted Design — Factory-correct location under driver-side frame rail for easy access during oil changes
Technical Specifications
| Specification |
Details |
| Part Number |
68268285AC (Replaces 68197866AA/AB/AC, 68268285AB) |
| Vehicle Fitment |
2013-2018 Ram 2500/3500/4500/5500 6.7L Cummins |
| Filter Type |
Fuel Water Separator Assembly (Chassis-Mounted) |
| Includes |
Filter Housing, Primer Pump, WIF Sensor Port, Drain Valve, Bracket |
| Material |
High-Grade Composite / Aluminum Bracket |
Compatibility
| Year |
Make |
Model |
Engine |
| 2013-2018 |
Ram |
2500 / 3500 |
6.7L Cummins I6 Turbo Diesel |
| 2013-2018 |
Ram |
4500 / 5500 (Chassis Cab) |
6.7L Cummins I6 Turbo Diesel |
Installation Guide
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Relieve Fuel Pressure — Open the fuel filler cap to release tank pressure
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Locate Assembly — Chassis-mounted housing on the driver-side frame rail, near the fuel tank
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Disconnect Quick-Connect Lines — Use fuel line disconnect tool; have rags ready for fuel spillage
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Unplug WIF Sensor — Disconnect the electrical connector from the water-in-fuel sensor
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Remove Mounting Bolts — Typically 2-3 bolts securing the housing bracket to the frame
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Install New Assembly — Bolt in the iFJF replacement, reconnect lines and WIF sensor
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Prime System — Pump the integrated primer until firm resistance is felt
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Cycle Key & Start — Cycle key to "Run" (not start) 3 times to prime, then start and inspect for leaks
Why Replace Your Water Separator?
Prevent $4,000-$8,000 Injector Failure: The CP4.2 high-pressure pump and Bosch piezo injectors are extremely sensitive to water. A cracked housing or leaking primer pump compromises water separation — allowing water to reach the injection system. Replacement is far cheaper than injector/pump repair.
Stop Diesel Leaks: Cracked filter housings and degraded seals create a fire hazard and fail DOT inspections. A complete assembly replaces all wear-prone components in one service.
Restore Reliable Priming: A worn primer pump that won't build pressure makes every filter change a frustrating battle with air-locked fuel lines.
FAQ
Q: How often should the water separator assembly be replaced?
A: The filter element inside the housing should be replaced every 15,000-30,000 miles. The complete housing assembly typically lasts the life of the vehicle unless damaged. Replace the housing if you notice fuel leaks, primer pump failure, or a cracked housing body.
Q: Does this include the actual fuel filter element?
A: No. This is the housing assembly. You will need to transfer your existing filter element or install a new one. Compatible filter elements include Mopar 68157291AA and aftermarket equivalents.
Q: Will this fit my 2019+ Ram with the 6.7L Cummins?
A: No. 2019+ Ram HD trucks (5th Gen) use a different fuel filter housing design. This assembly is specifically for 2013-2018 model years. Verify your OEM part number before ordering.
Q: Why does my Ram have TWO fuel filters?
A: The 6.7L Cummins uses a two-stage filtration system: (1) this chassis-mounted water separator removes water and large particles, then (2) the engine-mounted fuel filter provides final fine filtration before the high-pressure CP4.2 pump.
Q: How do I know if my housing is cracked?
A: Look for diesel fuel drips or wetness on the housing body, a strong diesel smell near the driver-side frame rail, or difficult priming after filter changes. Cracked housings are common in cold climates where trapped water freezes and expands.
Q: Can I drain water without removing the filter?
A: Yes! The integrated drain valve on the bottom allows quick water purging. Place a catch container underneath, open the valve, and drain until clean fuel appears. Do this every oil change or whenever the WIF dashboard light illuminates.
Q: Is this compatible with B20 biodiesel?
A: This housing is manufactured from biodiesel-resistant composite materials rated for B5-B20 blends. Follow your engine manufacturer's biodiesel usage guidelines and reduced filter change intervals when running biodiesel.
Q: How does this compare to the OEM Mopar assembly?
A: Manufactured to OE specifications using equivalent materials and processes. Same fit, function, and durability at a significantly lower price point. All mounting points, line connections, and sensor ports match factory dimensions exactly.
📚 Related Guides & Articles
📖 Related Guide: FS1098 Fuel Water Separator Install Guide for Cummins B6.7 & ISL8.9 — Torque Specs, Cross-Reference & DIY Steps
