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C vs. J code oil filters

Discussion in '1982-Present GM Diesel' started by schlechto, Jul 28, 2002.

  1. schlechto

    schlechto Registered Member

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    I went to get a new oil filter and I saw that there were two kinds, what is the difference in the filters, I know the differences in the engines, but the oil filters appear identical only with different codes
     
  2. DieselDan

    DieselDan 1/2 ton status

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    Just a guess; but maybe one has the anti-drain back valve in it (the other doesn't). Later styles (6.5) with oil cooler and turbo need the anti-drain valve for start up.
     
  3. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Dan is right. That's the only difference. It's the same thing with gassers depending on how the filter is oriented on the engine. If the filter sits at the bottom of the block the anti-drainback filter is unneccesary, but if it's on the side of the block the anit- drainback valve is needed to keep oil in the filter for start-up.
     
  4. schlechto

    schlechto Registered Member

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    Thanks guys /forums/images/icons/smile.gif
     

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