Results 1 to 4 of 4
  1. #1
    Antiguan FZR's Avatar
    Join Date
    Jan 2007
    Location
    Antigua Caribbean
    Posts
    1,107
    +1
    3

    4-Tec Valve Guides

    How difficult is it to change the valve guides in a 4-Tec head?

    I am helping to rebuild a head with 300+ hours that has alot of play in the guides.

    What do you guys recommend?


  2. #2
    GTXX's Avatar
    Join Date
    Jan 2006
    Location
    NW, GA
    Posts
    1,776
    seems like the manual says to not heat the head and to machine off part of the old guide before pressing it out. there is always a risk of something going wrong when replacing the guides and the head becoming unusable. I've always wondered if you could install thin wall bronze liners in the existing guides instead of replacing them.

  3. #3
    Antiguan FZR's Avatar
    Join Date
    Jan 2007
    Location
    Antigua Caribbean
    Posts
    1,107
    +1
    3
    I guess the best option is a new head, what amount of play is acceptable?

  4. #4
    Got Boost? psycho rxp's Avatar
    Join Date
    Jul 2005
    Location
    Port St. Lucie, FL
    Posts
    5,445
    +1
    182
    Quote Originally Posted by Antiguan RXP View Post
    I guess the best option is a new head, what amount of play is acceptable?

    I just removed a broken guide, with a round punch, and a hammer. Didn't have to hit it as hard as I expected to either. When u buy new guides, they should be installed by a good engine machine shop, and then reamed out to fit the valve exactly. (they come smaller then the valve o.d.and must be opened for that valve)

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Knurling valve guides
    By stickshift69 in forum 4-Tec Performance
    Replies: 28
    Last Post: 08-31-2010, 11:24 PM
  2. bronze valve guides
    By dduck1628 in forum 4-Tec Performance
    Replies: 7
    Last Post: 05-06-2010, 08:07 PM
  3. Replies: 6
    Last Post: 03-21-2010, 11:34 PM
  4. WTB wtb ultra 250 oem valve guides
    By buckie in forum Kawasaki Classifieds
    Replies: 2
    Last Post: 12-19-2009, 11:50 AM
  5. Early 4tec valve guides converted
    By Louis914 in forum 4-Tec Performance
    Replies: 5
    Last Post: 11-06-2009, 04:23 PM

Posting Permissions

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