dumb question, anyone know where the pcv is on a 4.9?
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HT4100 4.1, 4.5, 4.9 Discussion, dumb question, anyone know where the pcv is on a 4.9? in Cadillac Engine Technical Discussion; just curious...
  1. #1
    germansheperd is offline Cadillac Owners Member
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    dumb question, anyone know where the pcv is on a 4.9?

    just curious

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  3. #2
    ewill3rd is offline Cadillac Technician
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    Re: dumb question, anyone know where the pcv is on a 4.9?

    It seems as though I recall it being in a grommet in the end of one of the valve covers.
    Maybe towards the top of the valve cover.

    Maybe I remember it being in the middle of the hose between the intake and the valve cover?

    It is hard to say and we don't see many of them anymore.

  4. #3
    kdcing is offline Cadillac Owners Fanatic
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    Re: dumb question, anyone know where the pcv is on a 4.9?

    In the valve cover near the firewall...driver's side.

  5. #4
    germansheperd is offline Cadillac Owners Member
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    Re: dumb question, anyone know where the pcv is on a 4.9?

    thank you ill check again, the car is a 93 with 43k and im sure its never been changed.

  6. #5
    behind-bars is offline Cadillac Owners Connoisseur
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    Re: dumb question, anyone know where the pcv is on a 4.9?

    Its covered in gunk lol. Pop the hood and go to the drivers side, at the very front of the car you will see a silver pipe running horizontally, it is at the end of that, right at the bend. One end fits in the silver pipe and the other end is into the engine..

    I replaced mine and was hard to find without knowing before hand since it had oily residue

  7. #6
    awadecki is offline Cadillac Owners Enthusiast
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    Re: dumb question, anyone know where the pcv is on a 4.9?

    Yup, it's in the front valve cover facing the radiator (NOT the firewall). Remove the plastic beauty cover that's held on by a single screw and it's under there.

  8. #7
    germansheperd is offline Cadillac Owners Member
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    Re: dumb question, anyone know where the pcv is on a 4.9?

    thanks for the help, as i guessed 14 yrs and 43k miles and it was never changed...i pulled out a nice dirty ROCHESTER PCV valve. i wouldve never of thought of pulling that cover off on top of the valve cover. Thanks again!

  9. #8
    kdcing is offline Cadillac Owners Fanatic
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    Re: dumb question, anyone know where the pcv is on a 4.9?

    Oops...my bad to send you to the wrong valve cover. Glad you found it and thanks to the others folks for correcting my error.

  10. #9
    behind-bars is offline Cadillac Owners Connoisseur
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    Re: dumb question, anyone know where the pcv is on a 4.9?

    Quote Originally Posted by germansheperd View Post
    thanks for the help, as i guessed 14 yrs and 43k miles and it was never changed...i pulled out a nice dirty ROCHESTER PCV valve. i wouldve never of thought of pulling that cover off on top of the valve cover. Thanks again!

    hehe, I forgot you have to pull that cover off, My cover broke off years ago

    Glad you found it

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