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Old 03-14-2016, 06:37 AM   #10
caltexflanc
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City: North Carolina for now
Join Date: Aug 2011
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I followed the engine Mfr's specs (Detroit Diesel) and used a 30 primary, OEM secondary of 7, the injectors had 2 micron screens before them. In talking to a a couple of old time Detroit mechanics they couldn't ever recall having to clean the screens. Having a smaller micron filter as a primary makes zero sense. All you end up doing is unnecessarily clogging it too soon. See the many articles on line about the reasons for progressive filtration.
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