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Thread: Core Plug size?

  1. #11
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    The plug sizes, and the one in the above post would probably be the nearest size in the old measurement. Best to measure the hole size in the block...






  2. #12
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    PUGS

    Hi Diana
    have a stack of them too
    when the mob talk about screw thread
    hard to think welsh pugs
    that is what us old folks call them
    inc every mech'man i have ever met
    cup core plugs?
    must be something east of the range
    do not tell Julia, she will put a levy on them
    any how if you want them
    they are a dime a dozen
    cheers
    Ian

  3. #13
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    Plug size

    This may be of interest just pulling down a motor at the moment and the three different plugs that are used.
    Left side of block sacrificial anodes (core plugs) as you can see they have been sacrificed. Note this S1 has alloy water pump would never have heard of coolant still had water in it from when it was last used 15 or so years ago and the pump and intake manifold are perfect so they did their job.

    Rear core plug this was steel and the flat hit in the middle type rusted out size of hole 1.13".

    Brass cup plug removed from right side, I was told plug where replaced in the early 70s.

    Plug sitting back in hole inside out. Question from this photo who can tell me what type of engine this is?


    Dennis

  4. #14
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    Question

    spreadbore 2litre

  5. #15
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    welch plugs

    Quote Originally Posted by Lotz-A-Landies View Post
    Ian

    It's the cup core plugs I want the size for (the ones that some people wrongly call Welch plugs).

    Diana
    Hi Diana

    what do you call them if they are not welsh plugs?

    Answers.com - What is welsh plug

    I am about to go through this same exercise, replacing the frost plugs in a 2.25 series IIA motor. the casting plugs I am looking for are the brass type water jacket plugs, but seeing that I can remove all of the freeze plugs fairly easily, I intend to write all the block plug sizes down in my parts book next to the part number for the core plugs.

    Cheers Arthur

  6. #16
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    Diana
    Found some 1/15/16 brass ones if they are the right size
    you can have 3 if you want them....... make that 4
    Last edited by groucho; 14th February 2011 at 02:51 PM. Reason: More info

  7. #17
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    Quote Originally Posted by wrinklearthur View Post
    Hi Diana

    what do you call them if they are not welsh plugs?

    <snip>

    Cheers Arthur
    Arthur

    Welch plugs were designed by the Welch Brothers of the Welch Motor Car Company of Pontiac Michigan and Patented by M.D. Hubbard Spring Company in the early 1900's.

    They are essentially a flat disk domed up to reduce the outer diameter, they are inserted up against a shoulder in the casting hole, then the dome pushed flat, expanding the diameter and forming the seal in the water jacket.

    It is one of numerous designs of "core" or "freeze" plugs, which include the Welch, the cup and the solid threaded designs.

    see: [ame="http://en.wikipedia.org/wiki/Welch_plug"]Core plug - Wikipedia, the free encyclopedia@@AMEPARAM@@/wiki/File:Corroded-Core-Plug.JPG" class="image"><img alt="" src="http://upload.wikimedia.org/wikipedia/en/thumb/e/e3/Corroded-Core-Plug.JPG/250px-Corroded-Core-Plug.JPG"@@AMEPARAM@@en/thumb/e/e3/Corroded-Core-Plug.JPG/250px-Corroded-Core-Plug.JPG[/ame]

    In a series Land Rover there is no shoulder in the core holes so the cup design of core plug is used.

    Diana

    You won't find me on: faceplant; Scipe; Infragam; LumpedIn; ShapCnat or Twitting. I'm just not that interesting.

  8. #18
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    Quote Originally Posted by back_in View Post
    [Title]Pugs[/title]
    Hi Diana
    have a stack of them too
    <snip>
    I have a stack of Pugs* too -



    Image when some of them were puppies!

    Diana

    * Your post "original title"

    You won't find me on: faceplant; Scipe; Infragam; LumpedIn; ShapCnat or Twitting. I'm just not that interesting.

  9. #19
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    Engine

    Sorry Russell the clue is in the last pic. Will leave it open for a bit to see if an other takers.
    Only 3 other types.
    The rear plug hole in a S1 block has the lip and often found with the flat type plug.
    Easiest to fit when doing a repair through the firewall inspection hole.
    Dennis

  10. #20
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    I'll take a guess and say siamese bore......

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