Engine Air Filter
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Cadillac STS Forum - 2005 through 2012 Discussion, Engine Air Filter in Past Cadillac Vehicle Discussion; Got a few warm days, so decided to change the Engine Air Filter. Looked for it at Wal-Mart, and could ...
  1. #1
    Subsailor613's Avatar
    Subsailor613 is offline Cadillac Owners Fanatic
    Automobile(s): 2006 STS RWD NAV F55 N*1SF
    Join Date
    Mar 2009
    Location
    NC for Now, Florida SOON
    Posts
    487

    Cool Engine Air Filter

    Got a few warm days, so decided to change the Engine Air Filter.
    Looked for it at Wal-Mart, and could NOT find it, Nor in their filter book.
    So decided to get an OEM.
    I always clean as much of the very,very,very,very fine dust that got through
    the filter, and plated on the piping going to the Throttle assembly.
    So I used water to clean ALL the stuff I could to get this dust OFF.
    Dried everything and reassembled,PITA,to catch the bottom of the
    cover for the filter, two 4 fingered, fingers, hold the bottom, and
    two phillips screws hold the top.Seems to run better at very low speeds,
    NOT tested @ WOT.
    BTW: the AC Delco number is A2944C or the OEM is: 25798271

    P.S. Don't forget to replug the MAS !

    Have Fun.

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  3. #2
    chugcatsts01 is offline Cadillac Owners Member
    Automobile(s): 2005 STS V-8 Northstar
    Join Date
    Jun 2012
    Location
    port richey, florida
    Age
    70
    Posts
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    Re: Engine Air Filter

    How did you remove the 'cover' to get to it?

  4. #3
    sztolcaddy is offline Cadillac Owners Member
    Automobile(s): Gone: 93 Seville V8 4.9L SLS, Now: STS v8 RWD'05, Honda Fit
    Join Date
    Nov 2004
    Posts
    80

    Re: Engine Air Filter

    I changed engine air filter myself too a few weeks ago. Actually it is the best to remove the whole filter box as it is the easiest way to change the filter insert. I disconnected the MAS and untighten the metal ring connecting the box to air intake, then two hex screws are holding the filter
    box, one close to the driver side front light assembly and one on the back on the strut wall or how it is called. There is enough play in coolant
    hose to move it to the back side and then the box is easily removed. I took it home and cleaned it and I could see what way the original filter
    sits in. I bought a Wix filter, I was considering for a while K&N but I got afraid of a need to apply some special oil to it. Filter was dirty as hell, engine breaths now much better and fuel efficiency increased a bit. I changed also a cabin filter while at it, sort of bigger PITA than engine air filter to change. I changed it to a non-active carbon one, I cleaned the old one with carbon with a hoover and I guess I will put it back, cause the one with no carbon transmits more smells.

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