STS-V Northstar reliability
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Cadillac STS-V Series Forum Discussion, STS-V Northstar reliability in Cadillac V-Series Forums; As a casual observer who will be on the hunt for an STS-V in a little over a year, I ...
  1. #1
    bicentennialcadillac is offline Cadillac Owners Enthusiast
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    STS-V Northstar reliability

    As a casual observer who will be on the hunt for an STS-V in a little over a year, I am impressed with the lack of "Northstar issues" reported here in comparison to the older, FWD engines. As a former owner of a self-destructed Northstar, I was a bit hesitant to get back in the game, but the early returns seem very encouraging. One should hope so given the premium for this hand-built version.

    So, any owners here who will let the air out of my balloon?

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  3. #2
    PGA2B's Avatar
    PGA2B is offline Cadillac Owners Connoisseur
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    Re: STS-V Northstar reliability

    I LOVE mine...............

    I was told the cylinder head sealing issue was solved before this engine was built.

  4. #3
    The Raven's Avatar
    The Raven is offline Cadillac Owners Enthusiast
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    Re: STS-V Northstar reliability

    Yeah really the motor is the least of your concern with this car. It's all the complicated expensive gadgets that are the problem.

  5. #4
    torched10's Avatar
    torched10 is offline Cadillac Owners Fanatic
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    Re: STS-V Northstar reliability

    ours is great--but id buy any extended warranty you can get.For my 2008 i negotaited it as part of my deal.Had my "radio" go out twice and my alternator

  6. #5
    Bob Glenn is offline Cadillac Owners Member
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    Re: STS-V Northstar reliability

    I have a great article about the development of the supercharged Northstar 4.4 liter (267 cid) V-8 (designated RPO LC3). I can't attach it ... invalid format (MSWORD) converted to a PDF but was to big for the format as it has pictures. If you PM me your email I will send it to you.

    Regards,

    Bob

  7. #6
    jedhead is offline Cadillac Owners Enthusiast
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    Re: STS-V Northstar reliability

    An article about the LC3 here:
    http://www.popularhotrodding.com/eng...ady/index.html

    Bob

  8. #7
    Bob Glenn is offline Cadillac Owners Member
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    Re: STS-V Northstar reliability

    same article -- thanks for the link.

    Regards,

    Bob

  9. #8
    NHRATA01 is offline Cadillac Owners Fanatic
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    Re: STS-V Northstar reliability

    Quote Originally Posted by PGA2B View Post
    I LOVE mine...............

    I was told the cylinder head sealing issue was solved before this engine was built.
    They did revise the standard Northstar head bolt design once in '00, and again late in the '03 run as they developed a RWD Northstar. The late '03 revision moved to LSx-style bolts which were longer with a coarser pitch. They also revised the block casting somewhere in the '00-'04 timeframe, as the porosity was a leading contributor to the bolt threads pulling out. Supposedly the RWD Northstars (and recent year DTS FWD N*) are essentially cured of the failings of the FWD version with respect to headgasket sealing.

    It's also worth noting that the LC3 Northstar is a closed deck, vs. an open for the other, non-SC versions. Closed deck is inherently superior for block-to-head sealing.

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