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63 Avanti master cylinder.

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  • 63 Avanti master cylinder.

    I've a slight leak where the m/c connects to the power booster. According to the parts catalog there is no gasket between these two surfaces. What would you do? Making a gasket? Using permatex liquid gasket?

  • #2
    This would indicate that the rear seal of the M/C is leaking. The fix is to remove and rebuild/replace the M/C.

    If your M/C is the original single circuit type, this would be a good time to consider converting it to a dual type for safety considerations.


    Jim Bradley
    Lewistown PA
    '78 Avanti II
    Jim Bradley
    Lake Monticello, VA
    '78 Avanti II
    sigpic

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    • #3
      What he said!

      I agree. This is definitely a case of where safety trumps purism and originality. Go for the dual master cylinder.




      Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, cocky and in general a malcontent.
      Poet...Mystic...Soldier of Fortune. As always...self-absorbed, adversarial, cocky and in general a malcontent.

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      • #4
        quote:Originally posted by Rerun

        This would indicate that the rear seal of the M/C is leaking. The fix is to remove and rebuild/replace the M/C.

        If your M/C is the original single circuit type, this would be a good time to consider converting it to a dual type for safety considerations.


        Jim Bradley
        Lewistown PA
        '78 Avanti II
        It'll soon stop leaking, but the car won't stop at all once the fluid leaks out.

        JDP/Maryland
        JDP Maryland

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        • #5
          Nostalgic Motors in Michigan might carry a conversion kit (ie, the necessary steel lines). They do offer kits to change from the NLA early-70s master cylinder to a more common m/c.

          Skip Lackie
          Washington DC
          Skip Lackie

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          • #6
            My Avanti's are early 63's which have a brace on the underside of the hood that a dual master cylinder hits, so I had to go back to the single (original) master. I did however use one from Ed Reynolds that had been sleeved with stainless steel, so that should at least add to the life of the part.

            60 Lark convertible
            61 Champ
            62 Daytona convertible
            63 G.T. R-2,4 speed
            63 Avanti (2)
            66 Daytona Sport Sedan
            59 Lark wagon, now V-8, H.D. auto!
            60 Lark convertible V-8 auto
            61 Champ 1/2 ton 4 speed
            62 Champ 3/4 ton 5 speed o/drive
            62 Champ 3/4 ton auto
            62 Daytona convertible V-8 4 speed & 62 Cruiser, auto.
            63 G.T. Hawk R-2,4 speed
            63 Avanti (2) R-1 auto
            64 Zip Van
            66 Daytona Sport Sedan(327)V-8 4 speed
            66 Cruiser V-8 auto

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            • #7
              quote:Originally posted by Warren Webb

              My Avanti's are early 63's which have a brace on the underside of the hood that a dual master cylinder hits, so I had to go back to the single (original) master. I did however use one from Ed Reynolds that had been sleeved with stainless steel, so that should at least add to the life of the part.

              60 Lark convertible
              61 Champ
              62 Daytona convertible
              63 G.T. R-2,4 speed
              63 Avanti (2)
              66 Daytona Sport Sedan
              Warren there is a way to adjust a dual MC to fit under the hood of the early Avantis. I believe it involves using some spacers on upper bolts where the power booster mounts to firewall to give the MC a little bit of downward slope. Check out Bob Johnstone's web site.

              John


              63R-2386 under restoration & modification
              sigpic
              John
              63R-2386
              Resto-Mod by Michael Myer

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              • #8
                If you are thinking about new metal brake lines try
                www.OldTimeParts.com. I like their product and service.
                You should be able to get the soft hoses at your flaps.

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