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head bolt size?

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  • head bolt size?

    i need to get a tap so i can clean the head bolt threads in my '91 3.1 VIN 'T' block. what size do i need to get?
    '91 Cutlass Supreme sedan - 3.1 Intercooled Turbo / Getrag HM-282 5-speed - 13psi / lightly modded
    '98 Regal GS - 3800 Series II Supercharged/HM-4T65E-HD - 180* T-stat, otherwise stock


    GM W-body Forums

  • #2
    11mmx1.50

    Marty
    '99 Z-28 - Weekend Driver
    '98 Dodge Neon - Winter Beater
    '84 X-11 - Time and Money Pit
    '88 Fiero Formula - Bone stock for now

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    • #3
      ah cool, i already have that tap same exact size i used on my 2.2 Turbo.

      thanks
      '91 Cutlass Supreme sedan - 3.1 Intercooled Turbo / Getrag HM-282 5-speed - 13psi / lightly modded
      '98 Regal GS - 3800 Series II Supercharged/HM-4T65E-HD - 180* T-stat, otherwise stock


      GM W-body Forums

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