12-26-2007, 05:50 PM
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Head Flunky
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Join Date: Sep 2007
Location: South Central Kansas
Posts: 1,590
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Cummins 6.7L Final Fuel / Water Separator Filter Information
The following is information for the Fuel Filter including P/N's for the 3 most popular and also the Filtering requirements in case you would like to go with something else like Amsoil for example.
Proper On-vehicle Final Fuel Filtering: - The large fuel filter mounted at the engine is the final fuel filter, water separator, fuel
heater, and water drain. This filter is the final “line of defense” when maintaining a high
level of fuel quality. If the diesel fuel is contaminated or contains moisture, the engine
mounted fuel filter system is the last chance to affect possible correction.
- The quality of the fuel, its prior storage, and fuel handling prior to the final filter all have a
significant impact on the amount of contamination and moisture entering the final fuel filter.
- It is important to drain accumulated moisture/water at least monthly from the final fuel
filter. Do not wait until the “Water In Fuel” indicator illuminates before performing this
maintenance.
- Maintenance on the final fuel filter / water separator is important. Follow the maintenance
schedule per the Owners Manual. Replace the filter more frequently if highly contaminated
or high moisture content fuel is encountered.
- On a 5.9L engine, if the final fuel filter is replaced due to a high moisture content diesel
fuel, verify that the water sensor probes in the final filter have been cleaned. Excessive
moisture may contaminate the sensor sensing probes. The 6.7L engine includes a new
water-in-fuel sensor with the new final fuel filter element.
- The final fuel / water separator filter must meet or exceed OEM specifications. Some
aftermarket filters may not meet OEM specifications.
- The final fuel / water separator filter must meet or exceed the filtration specifications listed in the table below.
- Final fuel / water separator filters that meet the above specifications are approved for use
on Cummins 5.9L and 6.7L diesel engines.
- The use of non-approved fuel filters will result in engine performance deterioration, and/or
possible progressive damage to the engine from foreign particle ingestion, and/or fuel
system component corrosion.
- It is recommended that customers use the MOPAR approved or Cummins Equivalent fuel
filters to protect the engine from debris and water contamination.
- The following final fuel / water separator filters are known to meet or exceed the specifications listed in the table above.
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