Build complete! problem I cant figure out now...
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2004-2007 Cadillac CTS-V Performance Mods Discussion, Build complete! problem I cant figure out now... in Cadillac CTS-V Series Forum - 2004 - 2007; Finally completed my build. Added Texas Speed stage 2.5 ported heads, Torquer V2 cam pacesetter headers,Magnaflow catback 42lbs injectors HP ...
  1. #1
    Mearl is offline Cadillac Owners Member
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    Build complete! problem I cant figure out now...

    Finally completed my build.
    Added Texas Speed stage 2.5 ported heads, Torquer V2 cam
    pacesetter headers,Magnaflow catback
    42lbs injectors
    HP Tuners
    trunion upgrade, ls7 lifters, new pushrods, ls2 timing chain, etc etc
    Monsters 18lb flywheel, stage 2.5 clutch

    Car runs great, but one major problem. Upon startup and first few minutes of driving the car sounds great, no excessive drivetrain noise. If I get into it "make a pull or drive spirited" it develops a loud ticking. This ticking noise goes away quickly when I stop the car and let it idle.
    If I let car cool down for awhile and re-start noise is not there until I get into it again.... ideas? I pulled the valve covers and nothing seems to be hitting anythign it shouldn't. Also replaced header gasket and re-torqued after a few heat cycles.

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  3. #2
    heavymetals's Avatar
    heavymetals is offline Cadillac Owners Master
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    Re: Build complete! problem I cant figure out now...

    Could be lifter "pump up".

    The pushrods might be a little long.

    Hard to say when you cam it.

  4. #3
    Mearl is offline Cadillac Owners Member
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    Re: Build complete! problem I cant figure out now...

    It sounds like its only coming from 1 cylinder though. I figured if pushrods were too long the ticking would be more continuous...?

  5. #4
    heavymetals's Avatar
    heavymetals is offline Cadillac Owners Master
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    Re: Build complete! problem I cant figure out now...

    Once the oil heats up and thins out the hydraulics "balance out".

    See if your oil pressure at operating temp seems high.

    I experienced this with preloads that were a little too much.

    My car is just the opposite.

    Noisy at start up but quiet after it warms up.

  6. #5
    PISNUOFF Guest

    Re: Build complete! problem I cant figure out now...

    It ticks after you get on it and goes away without shutting the car off and letting it idle? What is your oil pressure at higher rpms? Can you get a vid of it doing it when parked?

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    robojesus is offline Banned
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    Re: Build complete! problem I cant figure out now...

    i'd honestly have to hear a video

  8. #7
    Mearl is offline Cadillac Owners Member
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    Re: Build complete! problem I cant figure out now...

    oil pressure is 30psi at idle and gets up to 40psi in higher rpms.

    Yes noise goes away pretty quickly when I park car and let it idle. goes away so quickly it would be hard to get a video, especially with my exhaust...!

    Took it to a track day at Mid-Ohio and it was loud enough that my friend could hear it from pit lane as I went by on the straight...

  9. #8
    heavymetals's Avatar
    heavymetals is offline Cadillac Owners Master
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    Re: Build complete! problem I cant figure out now...

    That pressure sounds a little on the low side.

    Idle I get about 32 lbs. Higher RPM's should rise to almost 60 lbs (roughly 10 lbs per 1000 rpm).

    What length pushrods did you use?

    Some cams use a smaller base circle to get high lift so the pushrods could be too short also.

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    Becker's Avatar
    Becker is offline Cadillac Owners Fanatic
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    Re: Build complete! problem I cant figure out now...

    just curious, can we rule out detonation?

  11. #10
    Mearl is offline Cadillac Owners Member
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    Re: Build complete! problem I cant figure out now...

    def. not detonation.

    pushrods are 7.3750. Texas Speed originally sent me 7.4000 but after using my pushrods length checker I swapped out the shorter ones.
    Thinking I may need to pull the rockers and re-check my preloads.... this was my first time ever doing this so I fear I may have not gotten it right.
    just seems odd it would only be making noise on what sounds like one cylinder.

  12. #11
    heavymetals's Avatar
    heavymetals is offline Cadillac Owners Master
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    Re: Build complete! problem I cant figure out now...

    What was your oil pressures (idle and high rpm) before?

    I use the same heads (not that it matters).

    You would be amazed at how much 0.025" makes.

    That is why I went adjustable rockers (the only way to go if you want to "dial in" the motor).

  13. #12
    PISNUOFF Guest

    Re: Build complete! problem I cant figure out now...

    Usually you need 7.425" pushrods for aftermarket camshafts because the base circle is slightly smaller. Make sure you use the correct pushrod length checker for the model pushrods you are buying. They measure and spec differently between models, even the same brand (i.e. comp magnums measure different than comp hi-tech's).

    How far from MidOhio do you live? I'm about 1:30 north and east of there. I could take a listen.

  14. #13
    JFensty's Avatar
    JFensty is offline Cadillac Owners Enthusiast
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    I have a similar issue but not near as bad as the op. My pressure is in the 60's top end, and it is not all of the time

    My questions is, how much preload should you have? I have 3/4 of a turn on all. Is this on the low side?

  15. #14
    heavymetals's Avatar
    heavymetals is offline Cadillac Owners Master
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    Re: Build complete! problem I cant figure out now...

    60 psi is right around "normal".

    Over 80 and you can probably kiss the oil pressure sensor goodbye.

  16. #15
    JFensty's Avatar
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    To clarify, I have 60+ psi on the top end and my noise/ticking doesn't always happen under load and high rpm.

    How much preload is needed on a ls motor? I currently have 3/4 or a turn from no lash to fully torqued rocker bolts. This is the same on all rockers. I have heard 1/2 turn to 2 full turns, is this correct?

    Heavy, if you have adjustables, how much preload do you have?

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