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JACKNOB

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    2
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About JACKNOB

  • Rank
    Member

Profile Information

  • Gender
    Male
  • Interests
    Auto racing, engine development and design/testing, fluid dynamics (computational & experimental) as applied to performance engines and total engine systems . . . etc., etc.

Profile Fields

  • From
    USA
  • Porsche Club
    Other
  • Present cars
    1966 VW
  • Former cars
    Numerous Ford based hot rods, numerous Porsche street and race cars.
  1. Hello gents, Can someone decipher the following two sentences from the 993 Shop Manual: 993 shop manual: "4. Bore inner valve guide dia. to a dimension of "g" = 8.00 to 8.015 mm using a broach or precision boring equipment. In an emergency, the valve guides may also be machined with a special reamer." Please read the two lines carefully. I asked this question on another p-car forum and the guys were totally confused in their reply posts. I do this work for a living for about 45+ years. I need one of these 993 (8mm) guide broach systems now. I will go into detail of why this broach system is superior for guide bore sizing if I get some reply posts of interest. ---
  2. Hello folks- I am new here and am not sure this is the proper forum for the topic at hand. Anyway here is the question: Does anyone know anything about rebuilding (valve job) the 4.5L V-8 direct injection cylinder heads? I believe the vehicle is a 2007 MY. Any technical information or thoughts would be appreciated. Jacknob
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