Question about 1994 Chevrolet C1500

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Bought a new driver side head for 1994 chevy 350ci need answer

It has a threaded hole above the #3 sparkplug what is it? Has 1 on each head.

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  • msfontenotsr Dec 03, 2008

    The passenger side hole has a sensor screwed in it I didn't change that head just the driver side but old head had no sensor.

  • Casey
    Casey May 11, 2010

    Are the threaded holes located in the same spot on both heads or is one in front and one in rear?

    It's possible that these are threaded holes used for attaching brackets when using a cherry picker to remove the engine from the vehicle.

  • yadayada
    yadayada May 11, 2010

    Does the old head have the hole? ask the people you bought the head from.



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It may be for the dipstick tube bracket. some heads fit many applications

Posted on Dec 03, 2008


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