Clicking noise in 3.6
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V6: 3.0, 3.2 LA3, 3.6 LY7, 3.6 DI LLT Discussion, Clicking noise in 3.6 in Cadillac Engine Technical Discussion; I am looking to buy a 2008 STS AWD with the 3.6 engine. When I started it up at the ...
  1. #1
    73survivor is offline Cadillac Owners Member
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    Clicking noise in 3.6

    I am looking to buy a 2008 STS AWD with the 3.6 engine. When I started it up at the dealership there is a ticking noise coming from the engine. As the engine warms up it gets quieter but it is still there. I was told that this is the normal operation of the high pressure fuel pump and injectors. The car has only 20k miles on it. Is this ticking sound something to be concerned about? Will it get worse as more miles are put on it? Has there been problems with the fuel pumps or injectors? I want to buy a good car. Anyone have any experience with this issue? TIA

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  3. #2
    briggy's Avatar
    briggy is offline Cadillac Owners Enthusiast
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    Re: Clicking noise in 3.6

    hard to say, Has the car always done this or is this something new, and is it getting progressively worse.

  4. #3
    tonyfort's Avatar
    tonyfort is offline Cadillac Owners Fanatic
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    Re: Clicking noise in 3.6

    If we are talking about the 3.6 Direct Injection engine then yes; the ticking is a normal sound of the direct injection system (though the DI ticking certainly does make it tough to determine if the engine itself does in fact have a different ticking noise that is actually a problem...)

  5. #4
    anfpak is offline Cadillac Owners Member
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    Re: Clicking noise in 3.6

    I know this is an old thread, but i didnt want to start a new one with the same question. Mine is a 2007 3.6L and is doing the same thing... the clicking noise (sounds like its coming pretty close to the windshield under the hood), which seems to go away after the car has warmed up. Did they have DI in 2007, or do I probably have a different issue?
    Thanks!

  6. #5
    concorso is offline Cadillac Owners Master
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    Re: Clicking noise in 3.6

    Quote Originally Posted by anfpak View Post
    I know this is an old thread, but i didnt want to start a new one with the same question. Mine is a 2007 3.6L and is doing the same thing... the clicking noise (sounds like its coming pretty close to the windshield under the hood), which seems to go away after the car has warmed up. Did they have DI in 2007, or do I probably have a different issue?
    Thanks!
    You should ask in the CTS section. The ticking is coming from Purge Valve Solenoid, and the faster it ticks, the more likely theres a problem. Youll hear it just behind the engine on the battery side.

  7. #6
    dboydr's Avatar
    dboydr is offline Cadillac Owners Member
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    Re: Clicking noise in 3.6

    The DI 3.6L 300HP engine was introduced in 2007.

  8. #7
    RippyPartsDept's Avatar
    RippyPartsDept is offline Hi, I'm Chris - Please Read My Signature
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    Re: Clicking noise in 3.6

    Quote Originally Posted by dboydr View Post
    The DI 3.6L 300HP engine was introduced in 2007.
    in Cadillacs it was first used in the 2nd Gen CTS (2008 Year Model... Fall 2007)
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  9. #8
    93DevilleUSMC's Avatar
    93DevilleUSMC is offline Cadillac Owners Connoisseur
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    Re: Clicking noise in 3.6

    My 2006 had this problem. It turned out to be the EVAP canister/solenoid on the top right of the engine. Part was $35, and I got it installed right there in the Autozone lot. Problem solved.

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