Results 1 to 4 of 4

Thread: 4age 16v valve adjustment needed?

  1. #1
    Junior Member
    Join Date
    Mar 2013
    Name
    Troy
    State
    WA - Washington
    Location
    TACOMA
    Country
    United States
    Posts
    8

    Default 4age 16v valve adjustment needed?


    TO REMOVE ADS, PLEASE
    REGISTER OR SIGN IN
    Hello,

    I'm in the process of replacing the headgasket on my 4age 16v ae86, during the process of taking the head off, some of the valve caps came off the head because I had it tilted so I could remove the intake manifold.

    What I'm asking mainly is do I need to check the clearances for each? I'm not very familiar on how to adjust these type of valves. I just bought the car a month ago for $500.

    I've tried searching google and other forums but I can't really get an answer.

    I put them back in the order they were to the best of my knowledge.

    Thanks for any help.




    Car - AE86

    motor / part in question - 4age

    problem - Question

    occurs/started when (if applicable)-

    personal situation (if applicable)-
    Last edited by Tman312; 2nd March 2013 at 07:43 PM.

  • #2
    Senior Member
    Join Date
    Jun 2011
    Name
    james
    State
    oxford
    Location
    general area
    Country
    England
    Posts
    128

    Default

    A fundamental of good engine performance is having the valve clearances correct, generally the 4age does not need re-shimming very often so it is worth
    doing right.
    So yes you do need to check the clearances.

    Fairly straightforward to do and the only slight issue is changing the shims with the cams fitted as the edge of the cam follower needs to be depressed
    to allow the shim to be removed. (in your case as the head is not fitted you can easily measure the clearances and just remove the cams to change
    the shims)

    As you already have the head off of the engine then you can do the clearances on the bench, just allow some space under the head face for the valves
    to move into. Turn the camshaft until the heel (circular part) of the cam is above the shim and measure the clearance with some feeler gauges.
    Make a note of the Valve number and whether it is inlet or exhaust and the clearance.
    Do this for all 16 valves.

    http://www.ae92gts.com/ae92gts_valve_adj.html
    Last edited by tottacrolla; 2nd March 2013 at 09:23 PM.

  • #3
    Junior Member
    Join Date
    Mar 2013
    Name
    Troy
    State
    WA - Washington
    Location
    TACOMA
    Country
    United States
    Posts
    8

    Default

    Quote Originally Posted by tottacrolla View Post
    A fundamental of good engine performance is having the valve clearances correct, generally the 4age does not need re-shimming very often so it is worth
    doing right.
    So yes you do need to check the clearances.

    Fairly straightforward to do and the only slight issue is changing the shims with the cams fitted as the edge of the cam follower needs to be depressed
    to allow the shim to be removed. (in your case as the head is not fitted you can easily measure the clearances and just remove the cams to change
    the shims)

    As you already have the head off of the engine then you can do the clearances on the bench, just allow some space under the head face for the valves
    to move into. Turn the camshaft until the heel (circular part) of the cam is above the shim and measure the clearance with some feeler gauges.
    Make a note of the Valve number and whether it is inlet or exhaust and the clearance.
    Do this for all 16 valves.

    http://www.ae92gts.com/ae92gts_valve_adj.html
    One thing I forgot to mention is the head is back onto the engine currently. And you adjust the clearances by moving the shims around/buying new shims?

  • #4
    Senior Member
    Join Date
    Jun 2011
    Name
    james
    State
    oxford
    Location
    general area
    Country
    England
    Posts
    128

    Default


    TO REMOVE ADS, PLEASE
    REGISTER OR SIGN IN
    Quote Originally Posted by Tman312 View Post
    One thing I forgot to mention is the head is back onto the engine currently. And you adjust the clearances by moving the shims around/buying new shims?
    Correct.
    Be careful turning the cams if the cambelt has not been fitted and timed.

  • Similar Threads

    1. Replies: 11
      Last Post: 12th February 2012, 03:57 PM
    2. WTB:valve springs for 16v 4age smallport
      By trd4ag in forum Cars or Parts Wanted
      Replies: 3
      Last Post: 30th December 2010, 10:29 PM
    3. Replies: 10
      Last Post: 22nd July 2009, 10:19 PM
    4. Valve adjustment 4K-C
      By Ksevn-T in forum Technical - Questions
      Replies: 5
      Last Post: 19th May 2008, 01:30 AM
    5. setting valve timing on 4a SOHC - help needed
      By Maxhag in forum Technical - Questions
      Replies: 4
      Last Post: 13th January 2008, 03:11 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
    •