>There is no listing in Bosch catalogs for a +4 spark plug in a Vanagon >application. Does anyone know if one will fit and how they compare with >other plugs? Are they worth the extra money?

  David,
  I can only think of two reasons Bosch does not list the +4 plug for the vanagon:
  1.    They made a mistake.
  2.    They don't want you using them in the vanagon.

  Since they would stand to make more money selling these plugs for the vanagon, I would assume that if they don't want you using them in the vanagon it is for a good reason... like they could harm the engine.

  I seem to remember a post last summer by a list member that said a Bosch representative had told him that the +4 was not listed for the Vanagon because they didn't want you using them in that engine, or that because they weren't listed he suggested not using them. I don't recall if he said why.

  Keep in mind that some plugs will make the head temperatures hotter than others... this could have other consequences beyond just a small boost in power... consequences that could take more than a couple of thousand miles to show up.

  If you want to know for sure see if there is a Bosch web site that you can send email to their tech department and ask them.... or call.

  Bill

  David W. Long
  DagenhamDave@prodigy.net
  http://pages.prodigy.net/dagenhamdave/DagenhamDave/
  Jacksonville, FL, United States
  1952 Chevrolet 4-Door (RIP)
  1971 Porsche 914 (RIP)
  1978 VW Transporter (RIP)
  1970 BMW 2002 (RIP)
  1967 Triumph GT-6 (RIP)
  1982 Subaru 4WD GL SW (RIP)
  1978 Volvo GL SW (RIP)
  1979 Lancia Beta (RIP)
  1982 Volvo GL SW (RIP)
  1985 Saab 900 Turbo (RIP)
  1993 VW Fox (RIP)
  1967 SAAB 96 (Restoration Vacation)
  1988 VW Vanagon (Daily Driver)
  1986 Honda Rebel (Daily Driver)
  --O-o-O--

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