pvc valve housing possible vacuum leak?

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 3 of 3
HT4100 4.1, 4.5, 4.9 Discussion, pvc valve housing possible vacuum leak? in Cadillac Engine Discussion; The rubber elbow that houses the pvc valve into the valve cover seems to have a lot of play and ...
  1. #1
    BLMDeville is offline Cadillac Owners Fanatic
    Automobile(s): 95 deville 4.9
    Join Date
    Mar 2012

    pvc valve housing possible vacuum leak?

    The rubber elbow that houses the pvc valve into the valve cover seems to have a lot of play and i was wondering if that could cause a vacuum leak or if it is supposed to be that way

  2. Remove Advertisements

  3. #2
    dennis93coupe's Avatar
    dennis93coupe is offline Cadillac Owners Connoisseur
    Automobile(s): 1993 Coupe Deville, 2009 XLR-V 1 of 6 Crystal Red
    Join Date
    Feb 2010
    Orange County, CA

    Re: pvc valve housing possible vacuum leak?

    When they get hard over time, it may feel loose. As long as it's in the cover and you don't see crankcase blowby coming out around the elbow it should be ok. It would be possible to have a vacuum leak between the PCV and the throttle body, but would be very unlikely. Your most likely location for a vacuum leak would be one of the hoses at the throttle body which I've seen most of the time the elbow for the line going to the EGR solenoid.

  4. #3
    drewsdeville is offline Cadillac Owners Master
    Automobile(s): 2011 Crown Vic LX, 2009 Chevy Malibu 2LT
    Join Date
    Oct 2004
    Oak Creek, WI

    Re: pvc valve housing possible vacuum leak?

    No, it will not cause a vacuum leak. Vacuum is sourced from the restriction that the PCV valve creates. Anything "after" the valve is irrelevant.

  5. Remove Advertisements
    Cadillac Forums

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Your date of birth and age are displayed in several places on the forum. Only the administrator will have access to your date of birth should you choose to hide it via the privacy option below.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts