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  1. #1
    Seaman Apprentice
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    Default 5.7 Vortec Head & Intake Manifold Torque Specs ?

    Installed Vortec heads on a standard 1986 reman 5.7 motor with roller lifters. My manual only goes up to 1996. I torqued the head bolts 3 times and in the sequence the manual said to. 22lbs, 44lbs and then 66lbs. Is this the same torque specs for the vortec head ?

    What is the torque spec and sequence for the vortec intake manifold ?

    Appreciate the help, thank you.
    I have included a couple of pictures as pictures are always nice






  2. #2
    Honorary Moderator Emeritus Don S's Avatar
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    Default Re: 5.7 Vortec Head & Intake Manifold Torque Specs ?

    Attached Images Attached Images
    Don S.


    Please, no PM's (Private Messages) regarding boat/engine problems.
    That is what the forums are for.
    Only forum/moderator issues will be answered in PM's.

  3. #3
    Seaman Apprentice
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    Default Re: 5.7 Vortec Head & Intake Manifold Torque Specs ?

    OK Found the specs for the intake manifold bolts. Seemed light so I checked with 3 sources to confirm.
    tighten in an x-pattern in bolts then outer bolts.
    1st: 61 INCH POUNDS, 2nd: 106 INCH POUNDS, 3 rd: 12 FOOT POUNDS. Have to go with the inch torque first as the foot pounds 3/8 wrench can't torque under 10lbs.

    Valve Adjustment. There is a specific sequence you must adhere to. Set the motor for #1cyl at Top Dead center, To adjust a valve back off the adjusting nut until lash is felt at the pushrod. Tighten the nut until all lash is removed. This can be determined by rotating the pushrods with your fngers. When all lash is removed the pushrod will stop rotating. When all play is removed rotate the nut 3/4-1 full turn.

    With the engine in #1 firing position the following valves can be adjusted:
    Exhaust 1,3,4,8
    Intake 1,2,5,7

    Crank engine one full revolution - The following valves can now be adjusted:
    Exhaust 2,5,6,7
    Intake 3,4,6,8.

    Valves Adjusted with above procedure


    Intake Manifold Gaskets Installed ( Felpro ) You need a bead of RTV sealant on the front and rear of the block where the manifold sits


    Intake Manifold Installed


    Oil Primed In Motor With Drill and Tool that primes the oil pump


    Valve Covers and distributor installed with rotor pointing to #1cyl


    Motor Sprayed with ACE Hardware Rust Stop 1000Degree Barbeque Paint

  4. #4
    Honorary Moderator Emeritus Don S's Avatar
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    Default Re: 5.7 Vortec Head & Intake Manifold Torque Specs ?

    You do understand that all this information is detailed in the OEM service manual don't you???
    Don S.


    Please, no PM's (Private Messages) regarding boat/engine problems.
    That is what the forums are for.
    Only forum/moderator issues will be answered in PM's.

  5. #5
    Seaman Apprentice
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    Default Re: 5.7 Vortec Head & Intake Manifold Torque Specs ?

    Don,
    The only manual I have did not include the vortec motor. Will definately get a manual with the 5.7 vortec.

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