What happens if a regular Cummins Filtration water filter is installed instead of the WF2121 slow release filter?
Should the WF2121 filter be removed at the normal interval of 150,000 miles and replaced with a regular maintenance interval water filter such as the WF2071, little harm will occur for the first couple of oil change intervals. Beyond that time, the SCA level will fall faster than when the WF2121 is installed. Should this occur, remove the regular maintenance interval filter and install the WF2121 immediately.
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