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Percy Header Gaskets

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  • #1

    Percy Header Gaskets

    So I installed them and think they still leak, the ticking isnt as bad though. Did they have to be installed a certain way because the two sides of the gasket were slightly different. I even re tightened all of the bolts after the first heat cycle and I tightened the bolts from the center ones outward.

    When I installed them I had the smooth bubble-like side facing the header and the side that had like trenches around each port to the heads.?
    1996 Z-28 6 speed, Airfoil, K&N FIPK, Flowmaster muffler, Motive 3.73 gears, BBK shorty headers, cut-out, LS1 Driveshaft, no power options (Rare), Prothane tranny mount, MSD 8.5mm wires, Accel U-Groove Plugs, Chrome hurst short throw, TB Bypass, ES Torque arm mount, BMR subframe connectors (weld-in), Lt4 Knock Module, Descreened MAF, '02 SS wheels, Pioneer HU, MTX & JL amps, 2 12" JBL's, T-Top Conversion!

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  • #2
    Originally posted by blackthunder50

    When I installed them I had the smooth bubble-like side facing the header and the side that had like trenches around each port to the heads.?
    That is backwards. The smooth side goes to the head.

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    • #3
      ughhhhhhh!!!! Should I take them off and put them back on? I was thinking either way doesnt matter since there not supposed to leak! Will they be reusable Joe? Thanks
      1996 Z-28 6 speed, Airfoil, K&N FIPK, Flowmaster muffler, Motive 3.73 gears, BBK shorty headers, cut-out, LS1 Driveshaft, no power options (Rare), Prothane tranny mount, MSD 8.5mm wires, Accel U-Groove Plugs, Chrome hurst short throw, TB Bypass, ES Torque arm mount, BMR subframe connectors (weld-in), Lt4 Knock Module, Descreened MAF, '02 SS wheels, Pioneer HU, MTX & JL amps, 2 12" JBL's, T-Top Conversion!

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      • #4
        Yes, they are reuseable. that's the huge benefit is that they seal irregular surfaces and don't burn through.

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        • #5
          Joe, what was the correct percy gasket part # for the LT1, because the gaskets came out but the port holes look like they were not big enough. I think I may have ordered the wrong gasket set.
          1996 Z-28 6 speed, Airfoil, K&N FIPK, Flowmaster muffler, Motive 3.73 gears, BBK shorty headers, cut-out, LS1 Driveshaft, no power options (Rare), Prothane tranny mount, MSD 8.5mm wires, Accel U-Groove Plugs, Chrome hurst short throw, TB Bypass, ES Torque arm mount, BMR subframe connectors (weld-in), Lt4 Knock Module, Descreened MAF, '02 SS wheels, Pioneer HU, MTX & JL amps, 2 12" JBL's, T-Top Conversion!

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          • #6
            Originally posted by blackthunder50
            Joe, what was the correct percy gasket part # for the LT1, because the gaskets came out but the port holes look like they were not big enough. I think I may have ordered the wrong gasket set.
            Part #66031 For D-port LT-1's.

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