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Thread: Valve seals

  1. #1

    Default Valve seals

    Working on a 1971 FLH . Did they come with valve seals ? I don't think so , I have some seals from a 1981 FLH that seem to fit on one guide (flat on top with a .562 dia. ) but the other has a 45 deg. chamfer on top ( is also .562 dia. ) , so the seal won't press flush with the top of the guide . The guides are in good shape I'd like to use them . Any Ideas ? Thank you , Mike

  2. #2

    Default

    No seals until 1981, there was a guide change in 1979, otherwise guides were the same from 1949-79.

  3. #3
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
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    4,308

    Default

    Earlier years can be up-dated, Mike!

    Usually by trimming the top of the guide with a Manley cutter for a .530" seal, retaining the original spring collars.

    (Free travel must be measured of course.)

    ....Cotten
    PS:
    Quote Originally Posted by TomL View Post
    No seals until 1981, there was a guide change in 1979, otherwise guides were the same from 1949-79.
    Except for the bronze and 'carpenter steel' ones, TomL?
    Seals were prescribed for soft cast-iron guides and nitrided valves as part of the immortal "un-leaded kit" of the 'Eighties.
    Last edited by T. Cotten; 07-17-2019 at 01:00 PM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  4. #4
    Join Date
    Oct 2016
    Posts
    126

    Default

    In the 80"s i used guides from the factory that had a -79A part #, set up for seals, we called them the short top guides.

  5. #5

    Default

    "Carpenter Steel"? That's a new one on me T. Cotten? Throughout the 70's we used oem guides without seals, bronze, and Ampco 45 bronze, others who had machinist skills bought bronze bar stock and made guides, this was before the unleaded sticking valve problem got real bad. To get around that the winning combination was Stainless Steel valves and Cast Iron guides with or w/o seals depending on whose guides you used and Stellite valve seats.

  6. #6
    Join Date
    Jun 2001
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    Central Illinois, USA
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    Default

    Quote Originally Posted by TomL View Post
    "Carpenter Steel"? That's a new one on me T. Cotten? Throughout the 70's we used oem guides without seals, bronze, and Ampco 45 bronze, others who had machinist skills bought bronze bar stock and made guides, this was before the unleaded sticking valve problem got real bad. To get around that the winning combination was Stainless Steel valves and Cast Iron guides with or w/o seals depending on whose guides you used and Stellite valve seats.
    I was referring to the vintage terms for the vintage hardware, TomL!

    (I was a toddler.)

    Yes, we are talking earlier Pans.
    Anything can be made, but I found cutting guides from window weights too much for my equipment.

    ....Cotten
    PS: If you ever put a reamer to a 'carpenter steel' guide, you regretted it .
    Last edited by T. Cotten; 07-18-2019 at 05:02 PM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  7. #7

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    I'm going to have to start looking at my drivers license more often so I know I am an old guy! ;-) Truthfully though it snuck up on me!

  8. #8
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    4,308

    Default

    It was new to me, too, TomL!

    That's how I remembered it.

    The literature might be more elusive...

    ...Cotten
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  9. #9

    Default

    Manley and others sell cutters for installing seals on intake guides. Just because they weren't available in 71 doesn't mean it's a good idea.

  10. #10

    Default

    Guides seals were more than a "good idea". When the industry stopped venting crankcases to the atmosphere, pressures and vacuum made things like guide seals a must.

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