Results 1 to 12 of 12

Thread: Petcock threads.

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Registered User
    Join Date
    Dec 2014
    Location
    Tucson, Az
    Posts
    27

    Petcock threads.

    I was wondering if there was a source for the thread size/pitch on the '70's R fuel tank fittings. A hose/fittings company says the male tank fitting is M20 x 1.0. I'm trying to find a solid end cap to be able to etch/tank seal. I see M20 x1.5 but no 1.0. Is this unique to BMW?
    Any help will be appreciated.
    Last edited by Danl; 04-11-2019 at 06:45 AM.
    Just an old guy here. Killin' bugs at a rapid pace since '68. Desert dweller.
    Current force: '77 R100/7 ,'85 K100RS-Aug84, '85K100RS-Aug84, '85 K100RS-June85, '93K1100LTSE,'93 K75LTP,'08K1200GT, (2)'72 CB 750s, '76 Honda CB500,

  2. #2

    Wine cork works just fine

    I shave down wine corks and stuff them in to do that.

  3. #3
    I just used rubber stoppers that I got at my local Ace Hardware store for the same purpose. Their fastener aisle (the one with lots of little drawers full of common, as well as fairly arcane hardware) had them in sizes to fit both the fuel petcock stubs, and the gas cap opening in my tanks. They held fine for the couple of hours I was sloshing Evapo-Rust around in my two tanks. I placed the tanks in a big plastic recycle bin when they were left to soak, just in case one of the stoppers decided to take a break, but they didn't leak a drop.

  4. #4
    Registered User
    Join Date
    Jan 2016
    Location
    Central Illinois
    Posts
    2,290

    Stoppers

    Quote Originally Posted by khittner View Post
    I just used rubber stoppers that I got at my local Ace Hardware store for the same purpose. Their fastener aisle (the one with lots of little drawers full of common, as well as fairly arcane hardware) had them in sizes to fit both the fuel petcock stubs, and the gas cap opening in my tanks. They held fine for the couple of hours I was sloshing Evapo-Rust around in my two tanks. I placed the tanks in a big plastic recycle bin when they were left to soak, just in case one of the stoppers decided to take a break, but they didn't leak a drop.
    I never drank anything good that came in a container with a rubber stopper

  5. #5
    Quote Originally Posted by 179212 View Post
    I never drank anything good that came in a container with a rubber stopper
    That's certainly true, and even though the label claims that Evapo-Rust is "non-toxic", I still wouldn't drink it.

  6. #6
    Registered User lmo1131's Avatar
    Join Date
    Jan 2010
    Location
    Pismo Beach, CA
    Posts
    3,987
    It's been at least ten years ago, but we had a salesman stop at our shop. Among other shop type chemicals he had Evapo-Rust on this truck. He went through his sales spiel and finished if off by taking a big slug of it out of a freshly opened bottle ... which I found to be thoroughly insane.

    I use rubber plugs from Ace as well.
    "It is what you discover, after you know it all, that counts." _ John Wooden
    Lew Morris
    1973 R75/5 - original owner
    1963 Dnepr

Similar Threads

  1. Petcock gaskets
    By ccolwell in forum Airheads
    Replies: 5
    Last Post: 09-22-2013, 12:53 PM
  2. Anyone know what kind of petcock this is?
    By RACEYDOG in forum Airheads
    Replies: 22
    Last Post: 04-12-2009, 01:46 AM
  3. Fuel Petcock ?
    By Dogface in forum Airheads
    Replies: 1
    Last Post: 11-24-2007, 06:51 PM
  4. Q on petcock rebuild
    By 26667 in forum Airheads
    Replies: 12
    Last Post: 08-21-2007, 03:26 PM
  5. Replies: 3
    Last Post: 08-31-2005, 11:50 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •