Setting roller rockers
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Setting roller rockers

  1. #1
    The Good mrjoshua's Avatar
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    Default Setting roller rockers

    I backed my H.S. Roller rocker arms last fall on any that had tension. I have to re set them. I've never done it. I do have the proper tool for the job just want to make sure there is no real trick to it..
    1 Roll the engine over by hand until the intake valve just begins to open and then set the corresponding exhaust valve correct?
    2 Tighten until you feel a bit of tension rotating the push rod with fingers, the another half turn tightening the poly and adjusting screw at the same time?
    3 for intake valve rotate engine until exhaust valve just begins to close and set the corresponding intake valve the same way.

    Seems simple..........

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    Senior Member ICECREAMAN's Avatar
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    "Adjust the intake valve when the exhaust valve begins to open.
    Adjust the exhaust valve when the intake is at least half closed."
    Courtesy, Reher Morrison, Championship Engine Assembly.

  4. #3
    AKA OhOneWS6 Last Mohican's Avatar
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    Do you know what cam you have? Hydraulic adjusts with zero lash or pre load. Mechanical has lash.

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    Senior Member southwind21's Avatar
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    Mohicans right on

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    Senior Member Mash on It's Avatar
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    On a properly adjusted hydraulic sbc/bbc valve, the pushrod will turn pretty easy, and using the "spin the pushrod" method maybe too tight. I feel for zero lash by "jiggling" the pushrod up and down, then 1/8 to 1/4 turn, or .060" preload, on hydraulic lifters, also works for mechanical lifters for setting lash.

    Here is a way to adjust the valves by turning the crank once, factory firing order:

    #1 TDC
    EX 1 3 4 8
    IN 1 2 5 7

    #1, 180* out, or #6 TDC
    EX 2 5 6 7
    IN 3 4 6 8

    I don't like turning the motor endless times between every valve- no oil pressure, major compression/friction, etc
    Hope this helps

    Daniel
    Mash on it
    "Never mind the mule, Just load the wagon"
    '76 Eliminator 21'

  8. #6
    Senior Member speedealer's Avatar
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    hey josh why don't you bring the boat by and we'll adjust your valves. give me a call don't have much going on after work this week.

  9. #7
    The Good mrjoshua's Avatar
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    Quote Originally Posted by speedealer View Post
    hey josh why don't you bring the boat by and we'll adjust your valves. give me a call don't have much going on after work this week.
    That sounds great Richard I'll take you up on that. I'll be in touch
    thanks to everybody for the responses

  10. #8
    Super Moderator HammerDown's Avatar
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    Quote Originally Posted by Mash on It View Post
    On a properly adjusted hydraulic sbc/bbc valve, the pushrod will turn pretty easy, and using the "spin the pushrod" method maybe too tight. I feel for zero lash by "jiggling" the pushrod up and down, then 1/8 to 1/4 turn, or .060" preload, on hydraulic lifters, also works for mechanical lifters for setting lash.

    Here is a way to adjust the valves by turning the crank once, factory firing order:

    #1 TDC
    EX 1 3 4 8
    IN 1 2 5 7

    #1, 180* out, or #6 TDC
    EX 2 5 6 7
    IN 3 4 6 8


    I don't like turning the motor endless times between every valve- no oil pressure, major compression/friction, etc
    Hope this helps

    Daniel
    Mash on it
    I concur with the "turning of the engine endless times"
    That's how I 'use' to do it...however...over on the DYNO section some red flags were raised with that method depending on the Cam profile > just saying.
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

  11. #9
    The Good mrjoshua's Avatar
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    Quote Originally Posted by Last Mohican View Post
    Do you know what cam you have? Hydraulic adjusts with zero lash or pre load. Mechanical has lash.
    I did forget to say the cam is hyd roller. Again thanks for the responses. Always good useful advice here
    Last edited by mrjoshua; 04-15-2012 at 07:15 AM.

  12. #10
    Super Moderator HammerDown's Avatar
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    Quote Originally Posted by mrjoshua View Post
    I did forget to say the cam is hyd roller. Again thanks for the responses. Always good useful advice here
    With my HYD Roller lifters and Iron heads, after zero lash 1/2-3/4 turn was suggested > Morel hyd-roller units used, and it took 3/4 to make them quiet. Just what works for me
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

  13. #11
    Senior Member fourtznme's Avatar
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    Google Comp cams. They have all the info you will need.
    Murrieta / Needles Marina Park

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