Crankcase Breathers

Discussion in 'Fox 5.0 Mustang Tech' started by jlhall_10, Dec 15, 2003.


  1. jlhall_10

    jlhall_10 New Member

    Joined:
    Sep 12, 2003
    Messages:
    120
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    St Mary's, MD
    what are these used for? they look like airfilters but sit on top of the valve covers.

    K&N Crankcase Filters
     
    #1
  2. Psychdaddy

    Founding Member

    Joined:
    Jun 14, 2002
    Messages:
    304
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Derby, KS
    These are to help evacuate extra pressure (i.e. crankcase) build-up; especially in supercharged applications.
     
    #2
  3. jlhall_10

    jlhall_10 New Member

    Joined:
    Sep 12, 2003
    Messages:
    120
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    St Mary's, MD
    ok so they are not really needed in N/A applications?

    EDIT: nevermind i found my answer at the bottom of the page!
     
    #3
  4. Michael Yount

    Michael Yount Advanced Member

    Joined:
    Apr 10, 2002
    Messages:
    9,047
    Likes Received:
    1
    Trophy Points:
    77
    Location:
    Charlotte, NC
    With a boosted application, unless the pcv system is altered, manifold boost can pressurize the crankcase -- a big no-no. The easy way around that is to be sure the pcv system has a check valve capable of keeping manifold boost out of the crankcase, and then venting the crankcase with breathers so the pressure there can escape. On a normally aspirated car, all that is handled by a properly operating pcv system.
     
    #4
  5. mr.nitrous

    mr.nitrous New Member

    Joined:
    Dec 13, 2003
    Messages:
    54
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Southern California
    Remove Crankcase pressure
     
    #5

Share This Page