Occasionally Driven 67 � Carburetor Problem - NCRS Discussion Boards

Occasionally Driven 67 � Carburetor Problem

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  • John Fowler

    Occasionally Driven 67 � Carburetor Problem

  • George Daina

    #2
    The problem is lack of driving time....

    Gasolene tends to evaporate over time, when that happens, the carb gaskets tend to shrink, the power valve diaphram may crack. Car gaskets have to be wet, and when they shrink, they may block an air passage, thus causing your rich situation.

    Comment

    • George Daina

      #3
      The problem is lack of driving time....

      Gasolene tends to evaporate over time, when that happens, the carb gaskets tend to shrink, the power valve diaphram may crack. Car gaskets have to be wet, and when they shrink, they may block an air passage, thus causing your rich situation.

      Comment

      • Christopher R.
        Extremely Frequent Poster
        • March 31, 1975
        • 1599

        #4

        Comment

        • Christopher R.
          Extremely Frequent Poster
          • March 31, 1975
          • 1599

          #5

          Comment

          • Patrick H.
            Beyond Control Poster
            • December 1, 1989
            • 11608

            #6
            Vice-Chairman (West), Michigan Chapter NCRS
            71 "deer modified" coupe
            72 5-Star Bowtie / Duntov coupe. https://www.flickr.com/photos/124695...57649252735124
            2008 coupe
            Available stickers: Engine suffix code, exhaust tips & mufflers, shocks, AIR diverter valve broadcast code.

            Comment

            • Patrick H.
              Beyond Control Poster
              • December 1, 1989
              • 11608

              #7
              Vice-Chairman (West), Michigan Chapter NCRS
              71 "deer modified" coupe
              72 5-Star Bowtie / Duntov coupe. https://www.flickr.com/photos/124695...57649252735124
              2008 coupe
              Available stickers: Engine suffix code, exhaust tips & mufflers, shocks, AIR diverter valve broadcast code.

              Comment

              • Tony H.
                Very Frequent User
                • May 31, 1993
                • 537

                #8
                Tony

                Comment

                • Tony H.
                  Very Frequent User
                  • May 31, 1993
                  • 537

                  #9
                  Tony

                  Comment

                  • Jack H.
                    Extremely Frequent Poster
                    • April 1, 1990
                    • 9906

                    #10
                    Re: The problem is lack of driving time....

                    Adding on to this post, Holley used composition paper gaskets between fuel bowl and venturi on some carbs from that era. Letting fuel evap through the vent stacks (run the car in the summer and stick it away for the winter) 'tickled' the problem. I'm sure if you had the carb overhauled by a good artisan recently, he used latest/greatest gasket technology which is much less prone to dry-up gasket fatigue and flake syndrome.

                    Still, there is a cheap simple alternative. That's to take a small plastic bottle with flip-up 'squirt' head (some shampoo items are packaged this way as well as GM lubricants) fill with gas, and squirt down the vent stack(s) of the carb to keep the fuel bowls full. Also, a real good suggestion for Spring start-up of your car to prevent excessive cranking while the fuel pump fills the bowls on initial start....

                    Comment

                    • Jack H.
                      Extremely Frequent Poster
                      • April 1, 1990
                      • 9906

                      #11
                      Re: The problem is lack of driving time....

                      Adding on to this post, Holley used composition paper gaskets between fuel bowl and venturi on some carbs from that era. Letting fuel evap through the vent stacks (run the car in the summer and stick it away for the winter) 'tickled' the problem. I'm sure if you had the carb overhauled by a good artisan recently, he used latest/greatest gasket technology which is much less prone to dry-up gasket fatigue and flake syndrome.

                      Still, there is a cheap simple alternative. That's to take a small plastic bottle with flip-up 'squirt' head (some shampoo items are packaged this way as well as GM lubricants) fill with gas, and squirt down the vent stack(s) of the carb to keep the fuel bowls full. Also, a real good suggestion for Spring start-up of your car to prevent excessive cranking while the fuel pump fills the bowls on initial start....

                      Comment

                      • Patrick H.
                        Beyond Control Poster
                        • December 1, 1989
                        • 11608

                        #12
                        Re: The problem is lack of driving time....

                        Jack,

                        Of course the other "cheap simple alternative" just involves putting left hand on steering wheel, right on shifter, left foot on clutch and right foot on gas, and then Driving the car so it all doesn't happen in the first place.

                        P.S. Driven the 65 lately?

                        Patrick
                        Vice-Chairman (West), Michigan Chapter NCRS
                        71 "deer modified" coupe
                        72 5-Star Bowtie / Duntov coupe. https://www.flickr.com/photos/124695...57649252735124
                        2008 coupe
                        Available stickers: Engine suffix code, exhaust tips & mufflers, shocks, AIR diverter valve broadcast code.

                        Comment

                        • Patrick H.
                          Beyond Control Poster
                          • December 1, 1989
                          • 11608

                          #13
                          Re: The problem is lack of driving time....

                          Jack,

                          Of course the other "cheap simple alternative" just involves putting left hand on steering wheel, right on shifter, left foot on clutch and right foot on gas, and then Driving the car so it all doesn't happen in the first place.

                          P.S. Driven the 65 lately?

                          Patrick
                          Vice-Chairman (West), Michigan Chapter NCRS
                          71 "deer modified" coupe
                          72 5-Star Bowtie / Duntov coupe. https://www.flickr.com/photos/124695...57649252735124
                          2008 coupe
                          Available stickers: Engine suffix code, exhaust tips & mufflers, shocks, AIR diverter valve broadcast code.

                          Comment

                          • Jack H.
                            Extremely Frequent Poster
                            • April 1, 1990
                            • 9906

                            #14
                            '65

                            Trying to get ready for local 4th of July parade and trek to Sun Valley. Have on jack stands -- tar top overhaul, gee they DO die after eight years....

                            Comment

                            • Jack H.
                              Extremely Frequent Poster
                              • April 1, 1990
                              • 9906

                              #15
                              '65

                              Trying to get ready for local 4th of July parade and trek to Sun Valley. Have on jack stands -- tar top overhaul, gee they DO die after eight years....

                              Comment

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