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hp/tq/ and 1/4 with a 76mm/78mm turbo

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  • there should be an actual tq spec, I would look on ls1tech and see whats been working for others.
    Doing less with more


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    • Yeah i actually did it oe way then realized I was probably doing it wrong. So I loosened them back up and retorqued to 22 ft lbs for now. Ive also never put sealant on any stock headbolts for coolant jackets, but never had an issue. Now im reading some need it???
      sigpic
      11.84 @ 117 w 1.66 60' (previous na best)

      - - 5.3/4L80e/T7875 - -
      - Huron Speed Turbo Kit -

      1998 Formula

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      • no, none of the factory head bolts touch any coolant.
        Doing less with more


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        • Aftermarket bolts are not torque to yield . Torquing them as such will snap them. Depending on lube the small ones should be 22-25 ft. And the large like 70-75 . Rockers are the only thing that need sealer/loctite

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          • Originally posted by 1BADAIR View Post
            Aftermarket bolts are not torque to yield . Torquing them as such will snap them. Depending on lube the small ones should be 22-25 ft. And the large like 70-75 . Rockers are the only thing that need sealer/loctite
            Yup, OEM style bolts have a loctite already on them and they are stretch bolts. People have reused them but I would never (I know you aren't, just saying in case others reference this post)

            Rockers bolts need loctite? I haven't once read this in any write up or . Not saying your wrong, but I need to know if I have to pull some covers off.

            1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
            1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
            1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc

            2006 Saab 9-7x 5.3i Daily Driver

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            • Originally posted by hoogiesngrinderz View Post

              Rockers bolts need loctite? I haven't once read this in any write up or . Not saying your wrong, but I need to know if I have to pull some covers off.
              I always use Loctite on rocker bolts. Think of all the alternating load cycles on those things!

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              • I did
                sigpic
                11.84 @ 117 w 1.66 60' (previous na best)

                - - 5.3/4L80e/T7875 - -
                - Huron Speed Turbo Kit -

                1998 Formula

                Comment


                • Rocker bolts need a thread sealant on heads that have the rocker bosses cut out as well.
                  2000 Formula
                  fixed slow junk

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                  • Originally posted by Nocooler View Post
                    Rocker bolts need a thread sealant on heads that have the rocker bosses cut out as well.
                    Typically ported heads can expose the rocker bolt holes on the intake side, true?



                    Mine are stock 317's, rocker bolts torqued to 22 ft-lbs, rotated crank 180* and checked again. Not going to pull the covers. I just overlooked the service manual and nowhere does it state to use thread lock or sealant.

                    1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
                    1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
                    1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc

                    2006 Saab 9-7x 5.3i Daily Driver

                    Comment


                    • Originally posted by hoogiesngrinderz View Post
                      Typically ported heads can expose the rocker bolt holes on the intake side, true?



                      Mine are stock 317's, rocker bolts torqued to 22 ft-lbs, rotated crank 180* and checked again. Not going to pull the covers. I just overlooked the service manual and nowhere does it state to use thread lock or sealant.
                      put yella terra rollers on my car 7 years ago. No loctite here. Not saying it is right, didn't know any better. No issues in 7 years.
                      sigpic
                      U.S. Army 1983-2005
                      11.20@122.37 1.51 60'

                      Originally posted by WMCCjames

                      "Plans Subject to change upon Sobering up"

                      Comment


                      • Originally posted by hoogiesngrinderz View Post
                        Typically ported heads can expose the rocker bolt holes on the intake side, true?



                        Mine are stock 317's, rocker bolts torqued to 22 ft-lbs, rotated crank 180* and checked again. Not going to pull the covers. I just overlooked the service manual and nowhere does it state to use thread lock or sealant.
                        the sealant/loctite comes on new bolts. like the main cap and crank bolt. its on the bottom of the bolt head

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                        • I need help figuring out if my 7.4 pushrods are proper length. I dont understand the math and all that goes with it. Im pulling my hair out trying to understand. Please help
                          sigpic
                          11.84 @ 117 w 1.66 60' (previous na best)

                          - - 5.3/4L80e/T7875 - -
                          - Huron Speed Turbo Kit -

                          1998 Formula

                          Comment


                          • get the the lobe base. then slowly tighten the rocker with just the socket while rocking it. when you get to slack thats 0. put on rachet and count the turns till tight( around 1)

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                            • Lobe base? Lowest part?
                              sigpic
                              11.84 @ 117 w 1.66 60' (previous na best)

                              - - 5.3/4L80e/T7875 - -
                              - Huron Speed Turbo Kit -

                              1998 Formula

                              Comment


                              • yes. base circle no lift. Or this is the proper way to check base circle and preload
                                phone 031.JPG
                                Last edited by 1BADAIR; October 29th, 2013, 08:57 PM.

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