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  1. #1
    Fellow Frogger!
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    Default welsh plugs

    My engine rebuilder is having trouble finding a 63 mm welsh plug for my 807 engine. Any clues as to a supplier?
    Geedee

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    1000+ Posts robmac's Avatar
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    As such a size does not seem to exist what have others used when rebuilding their 807 engines?

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    1000+ Posts robmac's Avatar
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    63 mm = 2.4803 inches

    So I'd suggest a 2.5 inch (63.5 mm) plug is probably usable. Even if it need a little easing on the belt linisher.

    I can't help wondering how accurate the quoted measurement is ?

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    Will check with my motor man when I get over a rotten cold I have at present.

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    In Europe plumbing fittings and much else are still made in inches and fractions thereof - but they express things in rounded mm. If that is true for welch plugs, you are looking for a 2 1/2" one. Measure the casting.

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    Quote Originally Posted by geedee View Post
    Will check with my motor man when I get over a rotten cold I have at present.
    I've got a cold too. Suggest you dose up on Codral Colds, flu & cough tabs. It's the first product I've found that gives effective symptomatic relief.

    If you run out of "night" tabs, you can buy them separately.

    My symptoms seem to hit me about 2:00 pm And peak at 10:00 pm.

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    Quote Originally Posted by seasink View Post
    In Europe plumbing fittings and much else are still made in inches and fractions thereof - but they express things in rounded mm. If that is true for welch plugs, you are looking for a 2 1/2" one. Measure the casting.
    Just been out in the shed and looked at a 807 head that I have out there that has had a new welsh plug fitted. It has 2 1/2" hand written on it.

    2 1/2" is 63.5mm as I id not fit this welsh plug I'm not sure how hard it was to push in.

    So like Seasink & Robmac says a 2 1/2 inch one will do.
    Regards Col

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    I'm guessing this is the plug at the timing gear end of the head? If so, a couple of part numbers to try, 77 00 559 223, superseded by 77 03 075 046
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    Quote Originally Posted by robmac View Post
    I've got a cold too. Suggest you dose up on Codral Colds, flu & cough tabs. It's the first product I've found that gives effective symptomatic relief. If you run out of "night" tabs, you can buy them separately. My symptoms seem to hit me about 2:00 pm And peak at 10:00 pm.
    Not exactly a Renault item, but those Codral tablets are a standard, essential item in my O/S travelling kit - they are the way to avoid EVER flying with blocked ears if you get that cold when travelling. NEVER fly with blocked ears. NEVER.
    Last edited by JohnW; 2nd April 2016 at 12:52 PM.
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    Quote Originally Posted by JohnW View Post
    Not exactly a Renault item, but those Codral tablets are a standard, essential item in my O/S travelling kit - they are the way to avoid EVER flying with blocked ears if you get that cold when travelling. NEVER fly with blocked ears. NEVER.
    Never fly with a blocked Eustachian tube to be precise.
    If blocked, you risk rupturing an ear drum if ambient pressure changes. Because the pressures on either side of the ear drum are unable to balance.
    Last edited by robmac; 2nd April 2016 at 04:52 PM. Reason: spelling

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    Quote Originally Posted by robmac View Post
    Never fly with a blocked Eustachian tube to be precise.
    If blocked, you risk rupturing an ear drum if ambient pressure changes. Because the pressures on either side of the ear drum are unable to balance.
    Exactly. A Renault friend of mine had to buy a cheap car and drive home to Perth from northern NSW a few years back, with two ruptured ear drums from the flight up. You didn't mention the pain - apparently is it extreme, to put it mildly. I can barely imagine.
    JohnW

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    The origins of a plug that did NOT originate in Wales are found here:

    http://www.britishcarweek.org/welch_plug.html
    Sunroof, cjl and Gamma like this.
    Don't it always seem to go that you don't know what you've got 'til it's gone............

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    Care to inform us about Dr Young's b**** plugs while you are espousing the history of plugs ?

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    Not sure where you are coming from there, Rob, I'm only an expert on stop butts, not butt plugs.....
    Don't it always seem to go that you don't know what you've got 'til it's gone............

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    Not sure where I found it (it was some time ago), but metric welch plugs do exist in all sizes. They're all, of course, very approximative. I remember measuring and they are easy 0.5mm or more larger. My suspicion is they're just imperial sizes rebadged. Use brass and it'll go in easy enough. Just don't bash in the middle. Have a drift almost the same diameter as the plug and when it's in, to seat it properly bash it gently and squarely with a drift the diameter of the lip, so the lip expands against the circumference.
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    I'm pleased to say I've never had the need to even touch one of these horrible devices. At least they seem horrible to me.
    JohnW

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  18. #18
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    The best "Drifts" for Welsh plugs I have found are the ever reliable socket set
    gsmack likes this.

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    I haven't changed one in years, but when I rebuilt engines a couple of taps with a ball pein hammer did the trick to fit them tight in against a touch of jointing compound. Brass ones needed a soft touch.

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    1000+ Posts schlitzaugen's Avatar
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    Quote Originally Posted by driven View Post
    The best "Drifts" for Welsh plugs I have found are the ever reliable socket set

    That's true, but I doubt most of us would have a 63mm socket in our collection.
    ACHTUNG ALLES LOOKENPEEPERS

    Das computermachine is nicht fur gefingerpoken und mittengrabben. Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit spitssparken. Ist nicht fur gewerken bei das dummkopfen. Das rubbernecken sightseeren keepen hands in das pockets-relaxen und watch das blinkenlights.

  21. #21
    1000+ Posts robmac's Avatar
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    Quote Originally Posted by Kim Luck View Post
    Not sure where you are coming from there, Rob, I'm only an expert on stop butts, not butt plugs.....
    So what is wrong aren't you interested in expanding your knowledge ? Not to mention expanding something else.

    The added advantage, if so fitted, is nobody could claim you are speaking through your proverbial, because it would be well and truly and sealed.


  22. #22
    1000+ Posts schlitzaugen's Avatar
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    Geez, Rob!
    ACHTUNG ALLES LOOKENPEEPERS

    Das computermachine is nicht fur gefingerpoken und mittengrabben. Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit spitssparken. Ist nicht fur gewerken bei das dummkopfen. Das rubbernecken sightseeren keepen hands in das pockets-relaxen und watch das blinkenlights.

  23. #23
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    Quote Originally Posted by schlitzaugen View Post
    That's true, but I doubt most of us would have a 63mm socket in our collection.
    True, for large sizes, down to the local plumbing shop.

    Piece of 50mm NB Gal pipe has an od of 60 mm and 40mm NB has an od of 48mm

  24. #24
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    Same as the original poster. I need to source a 63mm and all I could get my hands on was a 2 1/5" or 63.5mm.

    Geedee how did you solve the issue?

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  25. #25
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    Will have to check with the engine rebuilder as it was some time ago and the memory needs an upgrade.

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