Pushrod Question

Discussion in '94-95 5.0 - Specific' started by Bub, Oct 7, 2015.

  1. Bub

    Bub Active Member

    Messages:
    535
    Likes Received:
    15
    Joined:
    Mar 16, 2012
    Location:
    Pistakee Highlands
    I'm helping out a friend install some heads (GT40) and when I dropped in the push rods (stock length 5/16" diameter) it just seemed like quite a bit of play then I remember when I did mine, even with the rocker arm tightened down I can still turn the rocker with minimal effort and make the push rod touch the sides of the guide plate. Am I just being over paranoid?? I'm wondering if since it's a 3/8" stud if the heads don't have 3/8" guide plates and require 3/8" push rods. Which I thought was more of a big block thing?? I'm not sure, any input would be appreciated. Thanks.
     
  2. 95opal

    95opal Well-Known Member

    Messages:
    2,030
    Likes Received:
    191
    Joined:
    Jun 21, 2007
    If you cant get the correct torque on the rockers you may need shims.
     
  3. Bub

    Bub Active Member

    Messages:
    535
    Likes Received:
    15
    Joined:
    Mar 16, 2012
    Location:
    Pistakee Highlands
    the push rod literally can move from side to side and touch both sides of the guide plates, I've installed the rockers 1/2 turn past 0 lash.
     
  4. Bub

    Bub Active Member

    Messages:
    535
    Likes Received:
    15
    Joined:
    Mar 16, 2012
    Location:
    Pistakee Highlands
  5. BigTang

    BigTang Active Member

    Messages:
    893
    Likes Received:
    0
    Joined:
    Oct 9, 2008
    If the gt40 heads have been remachined to run a guide plate and stud mount rockers you need a longer pushrod, not a thicker one. And as far as torquing them down that is no longer valid because they aren't pedestal mount so there is nothing to torque against.


    Sent from my iPhone using Tapatalk
     
  6. BigTang

    BigTang Active Member

    Messages:
    893
    Likes Received:
    0
    Joined:
    Oct 9, 2008
    And what's the point of the video? To show they don't bind up against the plate? Make sure you run a hardened pushrod with those plates.


    Sent from my iPhone using Tapatalk
     
  7. Bub

    Bub Active Member

    Messages:
    535
    Likes Received:
    15
    Joined:
    Mar 16, 2012
    Location:
    Pistakee Highlands
    I will measure again but it looked good when I used the adjusting pushrod.

    Point of the video is to show the excessive play between the 3/8" guide plate and 5/16" pushrod