No announcement yet.

So, Your Carb Still Leaks

  • Filter
  • Time
  • Show
Clear All
new posts

  • So, Your Carb Still Leaks

    If you install a new needle and seat and the carb still leaks, make sure you aren't sending rust and junk down the line.
    The pencil filter in the top of the tank valve is an important first step.
    If you have a cast iron sediment bulb,make sure it's spotless clean inside, or you may be sending junk down the line.
    I forgot to show the lock washer in picture 4.
    Don't overlook the final filter in the carb, as I've see rust collected there also.
    You do not have permission to view this gallery.
    This gallery has 4 photos.

  • #2
    I know how much you like ethanol in gas. Does it promote gas leaks in addition to poorer gas mileage and less stability?


    • #3
      After dis-assembling about 20 of those I was suprised how plugged most of them were. Not sure how any of them were straining out anything or even letting gas get to the carb. Rod
      "Much of the social history of the Western world, over the past three decades, has been a history of replacing what worked with what sounded good." Thomas Sowell


      • #4
        Those are great pics along with some good info. I am going to copy your post and add it to the fuel filtering thread i started in the tech forum.

        I know those iron bulbs filter good, but i prefer the glass type with a filter inside.
        I like to see whats going on in there
        3 ~ Tudor's
        Henry Ford said
        "It's all nuts and bolts"

        Mitch's Auto Service ctr


        • #5
          I'm with you on that as well mitch.


          • #6
            In the third picture, my new sediment bulb brass screen hadn't arrived yet, so I didn't have it to show in the picture. The old screen was gone.

            Dave, I don't know if ethanol promotes leaks, but since it attracts moisture, I'd say it adds to tank rust.


            • Mitch
              Mitch commented
              Editing a comment
              Ethanol does play hell with rubber fuel lines & Evap systems, so in the end once they deteriorate enough i am sure a leak can start on a car using them

          • #7
            Always a good easy thing to check before going on the road!


            • #8
              I had some trouble with those viton tipped float valves sticking and removed them. Not too many others have noted the problem, so maybe it was just me. I have the glass bowl type.


              Related Topics


              • Tom Rode
                Why no fuel filter?
                by Tom Rode
                My recently acquired model A does not have an inline fuel filter. The gas line comes through the fire wall for about 10 inches then a section of rubber fuel line hose, clamped both ends, to another section of copper line to carb. No Fuel filter. The good news here, visual inspection of the fuel tank reveals Spotlessly Clean tank, no rust, sediment, nothing. Ran out of fuel recently (just got the rebuild...
                11-26-2019, 09:08 AM
              • Mitch
                Fuel System Basics and Filtering Options
                by Mitch
                Fuel System Basics and Filtering Options

                The stock Model A fuel filtering consists of a stand up pencil type filter screen on top of the tank shutoff valve which sits inside the tank, (these pencil filters were not used when the car was built) a cast iron or glass sediment bowl and an inlet screen at the carburetor. The late 31 indented fire wall models have the shut off valve under the...
                06-19-2017, 10:19 AM
              • DaWizard
                Will the problems never stop?
                by DaWizard
                Well, now that I have a great spark I find something else to take away from my driving pleasure.

                About an hour or so ago, while driving on the busiest 4 lane highway we have, the engine decides to just rough idle at a signal and die! (it just had to be this road and me in the fast lane parked!)

                Well, after trying fruitlessly to get Wheezer running again, parked in the #1
                12-22-2018, 07:09 PM
              • dmdeaton
                New to me roadster quit on us tonight, carb question.
                by dmdeaton
                Ok, this morning I took a 30 mile round trip to Ron's Machine Shop in Shandon, OH to show them the car. Stopped on the way home and filled up with 5 gallons. We jumped in tonight to take a short drive and less than a mile from the house it started sputtering and finally quit. Got it started with choke and it idled for a while then quit. Pushing on gas pedal it is starving for gas. I am pretty sure...
                09-16-2017, 09:32 PM
              • Big guy
                Could it be vapor lock?
                by Big guy
                Sadly today was this first time Roscoe was out. Took me to the carwash to remove the dust. Started with barely tapping the starter and purred like a kitten.This was the first time with new in tank filter, new gas shut off valve, Wix filter, new bowl to carb gas line and new Renner jets. So ran wonderful on the ride to and from the car wash until I got stuck by a train. I shut him down until the train...
                06-02-2020, 06:05 PM
              • Terry, NJ
                B Carbuetor blues
                by Terry, NJ
                A couple of years ago, I bored out an A manifold to B size and installed a B carburetor on my coupe. At first there were some problems with rust in the tank. I got it straightened out with a pencil filter and a paper filter in the fuel bowl. Since then it's been great! Then I took the car over to a friend's garage to do the brakes and the carb started leaking. The new tank valve was leaking too, but...
                07-02-2020, 08:03 PM
              • 1930 Closed Cab PU
                Fuel Line Gas Boiling
                by 1930 Closed Cab PU
                Am just relaying something interesting I experienced yesterday during my club's "Covid Tour # 4". Am not asking for help.

                The tour started about an hour away, 3 cars met part way there including me. One of us started experiencing missing issues part of the way there. Continued on and joined the rest of the group. Took a nice back roads 2 hour drive through Wisconsin to the Merrimack...
                08-28-2020, 08:34 AM
              • JohnB15632
                Gas Line Filter Leaking
                by JohnB15632
                Try as I might, I can not stop the gas line filter (Photo 3 attached) to quit leaking. I am guessing something is wrong with the filter assembly. I have removed, disassembled, reassembled, and reinstalled many, many times. It will not quit leaking.

                So, I am going to order a new gas filter assembly. I saw in one of the vendor's catalog, this side mount gas line filter (Photo 1 attached)....
                You do not have permission to view this gallery.
                This gallery has 3 photos.
                01-18-2020, 09:44 AM
              • Roadster Rich
                by Roadster Rich
                Remebering Mitch's post from last week about your strengths and weaknesses. Well mine seem to be all weaknesses as I get older. I had my roadster running so well for the last few months. The after three days without driving it, I took her out and had serious skipping problems on acceleration. What to do? Well I have the FS Ignition distributor so that was my first thought. Pulled out the timing...
                02-22-2019, 08:28 AM
              • Cape Codder
                Pencil filter question
                by Cape Codder
                Having read through all of the posts including about using the pencil upright filter in the top of the fuel shutoff I have a question. Although I do have one in my car, my question is, if that filter gets clogged when I have a FULL tank of gas HOW can I drain the tank to rectify the problem? On the other hand IF I omitted that filter and installed the "top hat" filter from NAPA I could...
                07-11-2019, 02:59 PM