1.6 Rollor Rockers Adjustment?

Discussion in 'Fox 5.0 Mustang Tech' started by Chris Marlin, Sep 19, 2013.


  1. Chris Marlin

    Chris Marlin New Member

    Joined:
    Jul 28, 2013
    Messages:
    7
    Likes Received:
    0
    Trophy Points:
    2
    Can you tell me how you guys do your adjustment? I have to set a new motor and I think I over tightened them. Did all the things your surpost to do. Set the exhaust valve to opening then loosened the adjuster and then backed off the lock. Waited a minute or so, let the lifter bleed up. Adjusted the nut till the rod started to get tight. Then a half of turn. I rechecked some I did by the feel of the rocker. At first they seemed way to loose. So I rechecked a few and restarted the procudure.. What Am I doing wrong? Sould there be any play side to side? Scorpion 1.6.
    #1
  2. liljoe07

    liljoe07 Active Member

    Joined:
    Feb 18, 2009
    Messages:
    1,179
    Likes Received:
    14
    Trophy Points:
    39
    Intake at full lift, set the exhaust. Exhaust at full lift, set the intake. Just move the pushrod up and down with your fingers as you slowly tighten the adjuster. At the point when the pushrod stops moving up and down, go 1/2 turn more, then lock down the set screw.

    Twisting the pushrod is one of the worst methods used.
    #2
  3. Chris Marlin

    Chris Marlin New Member

    Joined:
    Jul 28, 2013
    Messages:
    7
    Likes Received:
    0
    Trophy Points:
    2
    So do you mean full lift as full valve open? Not at valve starting to open? I thought if you push the rod your going to push the lifter?
    #3
  4. liljoe07

    liljoe07 Active Member

    Joined:
    Feb 18, 2009
    Messages:
    1,179
    Likes Received:
    14
    Trophy Points:
    39
    Yes full lift, but when each rocker is at full lift, you will set the rocker next to it on the same cylinder. That rocker will be up(valve closed).
    #4
  5. 84Ttop

    84Ttop They make new pistons every day, so why worry? SN Certified Technician Mod Dude

    Joined:
    Jul 3, 2009
    Messages:
    3,049
    Likes Received:
    1,217
    Trophy Points:
    144
    This method is incorrect. The cam needs to be on the base circle of the lobe in order to guarantee proper lash adjustment.

    Starting with #1 cylinder, turn the engine over until the exhaust pushrod just begins to move up. At this point you can adjust the intake rocker arm.
    After you have adjusted the intake rocker arm, you will now want to turn the engine over while watching the same intake pushrod that you just set, it will go full open and then begin to close. When it is almost closed, stop and adjust the exhaust rocker arm on that particular cylinder. By following this procedure, you are assured that both of the lifters are at the base circle of the cam and that there is no additional pre-load applied to them from cam lift at this point.
    #5
    Rick 91GT likes this.
  6. mikestang63

    mikestang63 Mustang Master

    Joined:
    Aug 28, 2012
    Messages:
    3,463
    Likes Received:
    901
    Trophy Points:
    144
    One of the best and easiest to understand videos on proper RR adjustment

    #6
  7. 84Ttop

    84Ttop They make new pistons every day, so why worry? SN Certified Technician Mod Dude

    Joined:
    Jul 3, 2009
    Messages:
    3,049
    Likes Received:
    1,217
    Trophy Points:
    144
    I was under the assumption that we are talking about stud mounted rockers, and now I'm curious as to what rockers the OP actually has
    #7
  8. mikestang63

    mikestang63 Mustang Master

    Joined:
    Aug 28, 2012
    Messages:
    3,463
    Likes Received:
    901
    Trophy Points:
    144
    Well I had a 50/50 chance so I spun the wheel. lol It would be nice if they would give some specifics in their question wouldn't it.
    #8
  9. liljoe07

    liljoe07 Active Member

    Joined:
    Feb 18, 2009
    Messages:
    1,179
    Likes Received:
    14
    Trophy Points:
    39
    Your method is no different than mine. Each will have the cam on the base circle. The base circle is not so narrow that it has to be in a precise area to set preload or lash.
    #9
  10. Rick 91GT

    Rick 91GT SN Certified Technician Site Sponsor

    Joined:
    Nov 30, 1999
    Messages:
    9,702
    Albums:
    1
    Likes Received:
    94
    Trophy Points:
    99
    Depends asymmetrical lobe profiles can be tricky

    Sent from my XT907 using Tapatalk 2
    #10

Share This Page