change plugs in v8

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Cadillac STS-V Series Forum Discussion, change plugs in v8 in Cadillac V-Series Forums; How do I find and replace plugs in my 05 sts v8? Also where do I find a repair manual? ...
  1. #1
    ethansts is offline Cadillac Owners Member
    Automobile(s): 2005 sts v8
    Join Date
    Dec 2013

    change plugs in v8

    How do I find and replace plugs in my 05 sts v8? Also where do I find a repair manual? According to the Haynes sight there isn't one.

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  3. #2
    rbzstsv is offline Cadillac Owners Fanatic
    Automobile(s): stsv
    Join Date
    Mar 2013
    I would try the sts side of the forum. Good luck with your search

  4. #3
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
    Automobile(s): 2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
    Join Date
    Sep 2010
    East Boston MA.
    Where do you find them? Have you ever changed plugs before? You remove the engine cover, and they're under the coil packs.

    Haynes and Chiltons manuals are essentially useless for these cars. You need a "real" Helm FSM. Their website or used in ebay. Or, a subscription to AllData.

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  6. #4
    CMNTMXR57's Avatar
    CMNTMXR57 is offline Cadillac Owners Connoisseur
    Automobile(s): 2006 STS-V, 2004 Pontiac GTO, 1999 Chevrolet Suburban LT 4x4
    Join Date
    Feb 2009

    Re: change plugs in v8

    Still technically the wrong section as it is not a "V" car

    - (optional), remove Strut Tower Brace (some need it to remove the engine cover and it does help as it's one less thing to work around)
    - Remove engine cover
    - Remove any cam cover ignition coil shield or fuel injector shields
    - Personally on LD8 and LH2 N*'s, I find it easiest to disconnect the main ignition feed to the coils, then unbolt the whole "cartridge" (as GM calls it), which leaves the coils mounted to an aluminum bracket, and remove it all as one piece carefully. Remember the coil module assembly sticks down to the holes, so there will be some length to them. There are also little green rubber doughnuts that fill the gap between that aluminum bracket and the actual cam cover to help seal the hole from any grease/debris. Make sure not to lose these.
    - Remove plugs down in their respective holes.

    On the passenger side you may have to work around A/C lines and on the drivers side, I've found on these STS's to completely remove and relocate the coolant overflow tank (you will need to have a long extension to get down behind the tanks and to the nut that holds it to the car.

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