How Come This Slant has An extra hole on the head?

Slant 6 Engines

  1. MAGA

    MAGA Member

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    I’m rebuilding a spare slant and will swap them. I noticed the head (by the Thermostat) has an extra hole compared the one I just pulled. Does anybody know what goes in each hole?

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  2. Tooljunkie

    Tooljunkie King of cobble/master of the broken bolt FABO Gold Member

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    In your case,a plug. Would likely be for the egr control or emissions control. A thermal vacuum switch similar to what you have.
     
  3. TF360

    TF360 Well-Known Member

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    Hey maga- does your new water pump have a extra metal plate on the backside? With two gaskets to sandwich everything?
     
  4. MAGA

    MAGA Member

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    Yes

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    • TF360

      TF360 Well-Known Member

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      Ok, interesting?
       
    • TF360

      TF360 Well-Known Member

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      No sealer huh?
       
    • MAGA

      MAGA Member

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      I used a copper gasket spray on it
       
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