FS1098 Fuel Water Separator for Cummins B6.7 ISB6.7 ISL8.9 - 5319680

Description

Product Overview

The FS1098 Fuel Water Separator Fuel Filter is a direct replacement for the Cummins B6.7, ISB6.7, QSB6.7, ISL8.9, and L9 diesel engine fuel/water separator. This high-efficiency filter removes water and contaminants from diesel fuel before they reach the high-pressure injection system. Replaces Fleetguard FS1098 and Cummins part number 5319680, 5303743. Compatible with Freightliner W100CFI, W120CFI, and W130CFI models.

Key Features

  • Cummins Fleetguard Compatible — Direct replacement for FS1098 / Cummins 5319680 and 5303743. Exact fit for B6.7/ISB6.7 and L9/ISL8.9 engine fuel systems.
  • Superior Fuel Protection — Advanced filtration media removes water and solid particles down to 7 microns, protecting CP3/CP4 high-pressure fuel pumps and common rail injectors from premature wear and failure.
  • Heavy-Duty Construction — Built to withstand the demands of commercial trucking, construction equipment, school buses, and industrial diesel applications. Meets OEM burst pressure and flow rate specifications.
  • PCV Valve Compatible — Designed to work with the integrated fuel system PCV (Pressure Control Valve) found on B6.7 and L9 engine platforms.
  • Freightliner Ready — Compatible with Freightliner W100CFI, W120CFI, and W130CFI models equipped with Cummins B6.7 and L9 diesel engines.

Engine Compatibility

Engine Displacement Common Applications
Cummins B6.7 / ISB6.7 6.7L Inline-6 Ram 2500/3500, Freightliner M2 106, Thomas/Freightliner School Buses, Blue Bird Buses
Cummins QSB6.7 6.7L Inline-6 Construction Equipment, Marine Engines, Generator Sets, Agricultural Machinery
Cummins ISL8.9 / L9 8.9L Inline-6 Transit Buses, Refuse Trucks, Motorhomes, Fire Trucks, Concrete Mixers
Cummins QSL9 8.9L Inline-6 Heavy Construction Equipment, Marine Propulsion, Industrial Power

Cross-Reference Part Numbers

Brand Part Number
Fleetguard / Cummins Filtration FS1098
Cummins OEM 5319680, 5303743
Freightliner W100CFI, W120CFI, W130CFI Compatible

Technical Specifications

Specification Value
Filter Type Fuel/Water Separator
Filtration Rating 7 Micron (Nominal)
Media Type Synthetic/Cellulose Composite with Hydrophobic Treatment
Flow Rate Up to 90 GPH (340 LPH)
Water Separation Efficiency >95% at rated flow
Service Interval 15,000 miles / 500 hours / 12 months

Warning Signs Your Fuel Filter Needs Replacement

  • Check Engine Light / Derate — Low fuel pressure codes (P0087, P0088) often indicate a restricted fuel filter
  • Power Loss Under Load — Engine feels sluggish when climbing hills or towing
  • Hard Starting / Extended Cranking — Restricted fuel flow makes cold starts difficult
  • Water in Fuel Warning — Drain the separator immediately and replace the filter if the warning persists
  • Reduced Fuel Economy — Engine compensates for restricted flow with increased injection duration

FAQ

Q: Will this fit my Freightliner M2 with a Cummins B6.7?
A: Yes. The FS1098 is compatible with Freightliner M2 106 trucks equipped with Cummins B6.7 engines. It fits the chassis-mounted fuel/water separator housing.

Q: What's the difference between this and the FS1098 with PCV valve?
A: This is the filter element only. Some FS1098 assemblies include an integrated PCV (Pressure Control Valve). If your vehicle requires the complete assembly with PCV, verify before ordering.

Q: How do I know if I need just the filter or the complete assembly?
A: If you're experiencing fuel pressure codes (P0087, P0088) or rough running, the PCV valve may also need replacement. The filter-only version is suitable for routine maintenance. The complete assembly with PCV is recommended when troubleshooting fuel system issues.

Q: Can I use this on a Ram 3500 with the 6.7L Cummins?
A: Ram trucks use a different filter configuration (two under-hood cartridge filters). The FS1098 is designed for chassis-mounted separator housings on commercial vehicles. Check your vehicle's specific filter specification.

Q: How often should I drain the water separator?
A: Drain the water separator monthly as preventive maintenance, or immediately when the "Water in Fuel" warning light illuminates. Even with a good filter, water can accumulate in the housing bowl and should be drained regularly.

FS1098 Fuel Water Separator for Cummins B6.7 ISB6.7 ISL8.9 - 5319680

Product form

SKU: FJ-FS1098

$26.99

      Description

      Product Overview

      The FS1098 Fuel Water Separator Fuel Filter is a direct replacement for the Cummins B6.7, ISB6.7, QSB6.7, ISL8.9, and L9 diesel engine fuel/water separator. This high-efficiency filter removes water and contaminants from diesel fuel before they reach the high-pressure injection system. Replaces Fleetguard FS1098 and Cummins part number 5319680, 5303743. Compatible with Freightliner W100CFI, W120CFI, and W130CFI models.

      Key Features

      • Cummins Fleetguard Compatible — Direct replacement for FS1098 / Cummins 5319680 and 5303743. Exact fit for B6.7/ISB6.7 and L9/ISL8.9 engine fuel systems.
      • Superior Fuel Protection — Advanced filtration media removes water and solid particles down to 7 microns, protecting CP3/CP4 high-pressure fuel pumps and common rail injectors from premature wear and failure.
      • Heavy-Duty Construction — Built to withstand the demands of commercial trucking, construction equipment, school buses, and industrial diesel applications. Meets OEM burst pressure and flow rate specifications.
      • PCV Valve Compatible — Designed to work with the integrated fuel system PCV (Pressure Control Valve) found on B6.7 and L9 engine platforms.
      • Freightliner Ready — Compatible with Freightliner W100CFI, W120CFI, and W130CFI models equipped with Cummins B6.7 and L9 diesel engines.

      Engine Compatibility

      Engine Displacement Common Applications
      Cummins B6.7 / ISB6.7 6.7L Inline-6 Ram 2500/3500, Freightliner M2 106, Thomas/Freightliner School Buses, Blue Bird Buses
      Cummins QSB6.7 6.7L Inline-6 Construction Equipment, Marine Engines, Generator Sets, Agricultural Machinery
      Cummins ISL8.9 / L9 8.9L Inline-6 Transit Buses, Refuse Trucks, Motorhomes, Fire Trucks, Concrete Mixers
      Cummins QSL9 8.9L Inline-6 Heavy Construction Equipment, Marine Propulsion, Industrial Power

      Cross-Reference Part Numbers

      Brand Part Number
      Fleetguard / Cummins Filtration FS1098
      Cummins OEM 5319680, 5303743
      Freightliner W100CFI, W120CFI, W130CFI Compatible

      Technical Specifications

      Specification Value
      Filter Type Fuel/Water Separator
      Filtration Rating 7 Micron (Nominal)
      Media Type Synthetic/Cellulose Composite with Hydrophobic Treatment
      Flow Rate Up to 90 GPH (340 LPH)
      Water Separation Efficiency >95% at rated flow
      Service Interval 15,000 miles / 500 hours / 12 months

      Warning Signs Your Fuel Filter Needs Replacement

      • Check Engine Light / Derate — Low fuel pressure codes (P0087, P0088) often indicate a restricted fuel filter
      • Power Loss Under Load — Engine feels sluggish when climbing hills or towing
      • Hard Starting / Extended Cranking — Restricted fuel flow makes cold starts difficult
      • Water in Fuel Warning — Drain the separator immediately and replace the filter if the warning persists
      • Reduced Fuel Economy — Engine compensates for restricted flow with increased injection duration

      FAQ

      Q: Will this fit my Freightliner M2 with a Cummins B6.7?
      A: Yes. The FS1098 is compatible with Freightliner M2 106 trucks equipped with Cummins B6.7 engines. It fits the chassis-mounted fuel/water separator housing.

      Q: What's the difference between this and the FS1098 with PCV valve?
      A: This is the filter element only. Some FS1098 assemblies include an integrated PCV (Pressure Control Valve). If your vehicle requires the complete assembly with PCV, verify before ordering.

      Q: How do I know if I need just the filter or the complete assembly?
      A: If you're experiencing fuel pressure codes (P0087, P0088) or rough running, the PCV valve may also need replacement. The filter-only version is suitable for routine maintenance. The complete assembly with PCV is recommended when troubleshooting fuel system issues.

      Q: Can I use this on a Ram 3500 with the 6.7L Cummins?
      A: Ram trucks use a different filter configuration (two under-hood cartridge filters). The FS1098 is designed for chassis-mounted separator housings on commercial vehicles. Check your vehicle's specific filter specification.

      Q: How often should I drain the water separator?
      A: Drain the water separator monthly as preventive maintenance, or immediately when the "Water in Fuel" warning light illuminates. Even with a good filter, water can accumulate in the housing bowl and should be drained regularly.

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