6.7L Cummins Forum

Squid · #1 (**permalink**) 12-26-2007, 06:50 PM

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.

Squid · #2 (**permalink**) 12-28-2007, 07:56 PM

I stopped by today and picked up a couple of oil and fuel filters and I couldn't believe how big it was. The filter on the left is the oil filter for a Nissan Titan with the 5.6L engine. The next filter is the oil filter for the Cummins 6.7L, the spark plug is for the inline 6 cylinder engine in a 56 Chevy pickup with the Fuel Filter/ Water Separator for the Cummins 6.7L on the right. I'll do a write up of the filter change when I do it this weekend.

Oh by the way, the filters aren't cheap coming in at $15.75 for the fuel filter and $12.70 for the oil filter. I keep looking for some other manufacturer but haven't had any luck so far.

SBN · #3 (**permalink**) 12-29-2007, 12:29 AM

I like to stick with OEM filters till after warranty runs out.
Never no questions as if you used the wrong filter etc.

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