User Tag List

+ Reply to Thread
Results 1 to 8 of 8

Thread: Valve shims

  1. #1
    Pit Crew Turbosport Subscriber keg's Avatar

    My 1st Project
    Join Date
    Mar 2008
    Location
    nottinghamshire
    Age
    35
    Posts
    1,255
    Thanks
    43
    Thanked 6 Times in 6 Posts

    Valve shims

    Just a quick one will I need new shims when changing the cam to a bigger one? or will i get away with the existing shims?

  2. #2
    TURBOSPORT SPONSOR Turbosport Subscriber
    Turbosport Moderator
    Turbosport Administrator
    Graham's Avatar
    My Race Car
    My 1st Project
    Join Date
    Feb 2006
    Location
    Ely, Cambs
    Age
    55
    Posts
    25,212
    Thanks
    298
    Thanked 2,294 Times in 2,102 Posts

    Re: Valve shims

    maybe, its all depends on how accurately ground the base circles of the cams are

  3. #3
    Tyre Kicker

    Join Date
    Jun 2011
    Location
    Vic, Australia
    Age
    42
    Posts
    38
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: Valve shims

    you might be able to mix and match with what you have. The set of 16V cams I did last required about 10 to 12 thinner shims to be installed. I had a friend supply a good choice of thinner shims or else I was going to just surface grind a pile of them.
    Custom 4AGE 20V conversion parts:
    S-86.com

  4. #4
    Pole Position Decade Plus User M11rf's Avatar

    Join Date
    Apr 2004
    Location
    Bangkok, Thailand, Thailand
    Age
    43
    Posts
    5,527
    Thanks
    489
    Thanked 159 Times in 144 Posts

    Re: Valve shims

    I was told that the std ones are usually fatter than required, so If you have a file as wide as the shim, you can rub it on the file and take some off it to get the right size.

  5. #5
    Tyre Kicker

    Join Date
    Jun 2011
    Location
    Vic, Australia
    Age
    42
    Posts
    38
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: Valve shims

    Quote Originally Posted by M11rf View Post
    I was told that the std ones are usually fatter than required, so If you have a file as wide as the shim, you can rub it on the file and take some off it to get the right size.
    a file!? I hope your being sarcastic
    Custom 4AGE 20V conversion parts:
    S-86.com

  6. #6
    Racer Decade Plus User

    Join Date
    Mar 2010
    Location
    Edinburgh
    Age
    44
    Posts
    3,655
    Thanks
    69
    Thanked 235 Times in 231 Posts

    Re: Valve shims

    Quote Originally Posted by Sam-Q View Post
    a file!? I hope your being sarcastic
    A precision file? Are shims not also hardened?.

  7. #7
    Pole Position Decade Plus User M11rf's Avatar

    Join Date
    Apr 2004
    Location
    Bangkok, Thailand, Thailand
    Age
    43
    Posts
    5,527
    Thanks
    489
    Thanked 159 Times in 144 Posts

    Re: Valve shims

    File them down on the underside, don't see the problem... As long as you keep them flat on the file.

  8. #8
    TURBOSPORT SPONSOR Turbosport Subscriber
    Turbosport Moderator
    Turbosport Administrator
    Graham's Avatar
    My Race Car
    My 1st Project
    Join Date
    Feb 2006
    Location
    Ely, Cambs
    Age
    55
    Posts
    25,212
    Thanks
    298
    Thanked 2,294 Times in 2,102 Posts

    Re: Valve shims

    shims are hard, a file will take weeks to thin them and the chances of keeping the faces parallel are slim, they need to be surface ground

+ Reply to Thread

Bookmarks

Posting Permissions

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