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Thread: Problem installing K&N air filter in 2011 CTS 3.0

  1. #1
    11CTS30 is offline Cadillac Owners Member
    Automobile(s): 2011 CTS 3.0 Performance
    Join Date
    May 2013
    Posts
    1

    Problem installing K&N air filter in 2011 CTS 3.0

    I have attempted to install a K&N filter but, I am unable to get the tabs on the airbox to engage properly, as a result the box won't close properly. I did review the pix and instructions on this site and another tech site. Still couldn't get it done. I called K&N
    they verified part nbr. and suggested trying to install in lid first. That did not work.
    Any similar experiences or help? Thanks.


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  3. #2
    ultimate_ed's Avatar
    ultimate_ed is offline Cadillac Owners Fanatic
    Automobile(s): 2009 CTS
    Join Date
    Jul 2007
    Location
    Texas
    Posts
    188

    Re: Problem installing K&N air filter in 2011 CTS 3.0

    I am actually getting ready to clean my filter this morning, so I was searching for the instruction post that I wrote up for it. I assume that the 3.0 has the same air box as the 3.6, but I can't confirm that.

    I do recall after rereading my notes that getting those tabs back in is a bit of a bear.

    You probably already saw it, but here's the link to my original post:

    http://www.cadillacforums.com/forums...ir-filter.html

    I'll see if I can discover anything new when I go through the process this morning.

  4. #3
    ultimate_ed's Avatar
    ultimate_ed is offline Cadillac Owners Fanatic
    Automobile(s): 2009 CTS
    Join Date
    Jul 2007
    Location
    Texas
    Posts
    188

    Re: Problem installing K&N air filter in 2011 CTS 3.0

    And, it's done. There's a coolant overflow hose that runs between the airbox cover and the fender. It was definitely easier for me to get the three tabs in after I lifted the hose out of the way. Had to squeeze a bit to get the hose back in after the cover was buttoned down, but certainly doable.


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