<div dir="auto">Thank you, Steve. Since the leak occurs (at least for me) primarily when the system is under pressure, it's hard to know when one has sufficiently lapped the surfaces. Anyone happen to know the thread size?<div dir="auto"><br></div><div dir="auto">Dave </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Sep 14, 2020, 11:57 AM Steve Kirby <<a href="mailto:sackirby@chinaautogroup.com">sackirby@chinaautogroup.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">The design of this valve employs a metal on metal interface as a sealing surface. There are no orings, seals or packing of any kind. The ability to seal depends solely on the two tapered metal surfaces being symmetrical enough to hold
water under pressure. That is not a good design. I believe that in the early days, since these valves are rarely used, they seeped enough water that eventually enough corrosion set in to accomplish a seal. The usually start to leak more seriously after
the valve has been operated. That makes sense, since then the corrosion seal would be broken and the process would have to start all over again. If the earlier corrosion had pitted or otherwise damaged the metal to metal interface, then that would make it
even harder for the valve to eventually reseal.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">The valve serves little if any purpose. I simple pipe plug could be substituted for a dependable seal and removed when the block is drained. However many people want to keep the period correct look of the valve (without having the leaking
problem). That is why Moss is considering offering a “dummy” valve. It will look just like the original and the handle will even turn, but the passage from the block to the valve stem will not be drilled, hence making this in essence a fancy pipe plug.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">The only “fix” I have seen, and it is rarely 100% successful, is to disassemble the valve and then try to lap the two metal surfaces together using valve lapping compound. This presumably would “perfect” the interface of the two metal
parts to a point where they would create a seal. <u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal"><b><i><span style="color:#0070c0">Steve Kirby<u></u><u></u></span></i></b></p>
<p class="MsoNormal"><b>President<u></u><u></u></b></p>
<p class="MsoNormal"><b>China Auto Group<u></u><u></u></b></p>
<p class="MsoNormal">22831 Avenida Empresa<u></u><u></u></p>
<p class="MsoNormal">Rancho Santa Margarita, CA 92688 USA<u></u><u></u></p>
<p class="MsoNormal">Direct: (949) 261-8208<u></u><u></u></p>
<p class="MsoNormal">Fax: (949) 767-5949<u></u><u></u></p>
<p class="MsoNormal">Cell: (949) 903-0957<u></u><u></u></p>
<p class="MsoNormal">Skype: steve.kirby29<u></u><u></u></p>
<p class="MsoNormal"><a href="http://www.chinaautogroup.com" target="_blank" rel="noreferrer">www.chinaautogroup.com</a><u></u><u></u></p>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<div style="border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> John Linney <<a href="mailto:john@linneyweb.com" target="_blank" rel="noreferrer">john@linneyweb.com</a>> <br>
<b>Sent:</b> Monday, September 14, 2020 7:58 AM<br>
<b>To:</b> David Friedlander <<a href="mailto:forzion7@gmail.com" target="_blank" rel="noreferrer">forzion7@gmail.com</a>><br>
<b>Cc:</b> Tom Mulligan <<a href="mailto:nute_shop@hotmail.com" target="_blank" rel="noreferrer">nute_shop@hotmail.com</a>>; TR3 Triumphs <<a href="mailto:triumphs@autox.team.net" target="_blank" rel="noreferrer">triumphs@autox.team.net</a>>; Steve Kirby <<a href="mailto:sackirby@chinaautogroup.com" target="_blank" rel="noreferrer">sackirby@chinaautogroup.com</a>>; New England Triumphs <<a href="mailto:net@newenglandtriumphs.org" target="_blank" rel="noreferrer">net@newenglandtriumphs.org</a>><br>
<b>Subject:</b> Re: [TR] [NET] Small coolant leak<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Go figure. I went through three of them before arriving at my ‘gum it up with something’ solution.<u></u><u></u></p>
<div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-bottom:12.0pt">On Sep 14, 2020, at 6:16 AM, David Friedlander <<a href="mailto:forzion7@gmail.com" target="_blank" rel="noreferrer">forzion7@gmail.com</a>> wrote:<u></u><u></u></p>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal"><u></u><u></u></p>
<div>
<p class="MsoNormal">I replaced my original because somehow, the handle on the tap had broken off. I didn't know the replacement ones all leaked. I wonder if TRF and Moss even know about the problem. If they do, why would they continue to sell what they
know is faulty, without trying to get the issue(s) resolved?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Dave<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<div>
<p class="MsoNormal">On Mon, Sep 14, 2020, 7:29 AM Tom Mulligan <<a href="mailto:nute_shop@hotmail.com" target="_blank" rel="noreferrer">nute_shop@hotmail.com</a>> wrote:<u></u><u></u></p>
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<blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
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<div>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Perhaps the reproduction cocks are poorly made but the original ones didn't leak. The design is ancient (similar cocks tapped beer kegs in the middle ages). There are two on every TR2 or 3, one
in the block and one in the radiator. <u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">And Dave, the plug is not a bad idea, and you wouldn't be the first to resort to that. Mine both work and don't leak but I never use them . On the rare occasions that I drain the coolant, I simply
pull off the bottom radiator hose, quick and easy.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Tom<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><u></u> <u></u></span></p>
</div>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><u></u> <u></u></span></p>
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<hr size="2" width="98%" align="center">
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<div id="m_-7545487272723173195m_-3794611960004115646divRplyFwdMsg">
<p class="MsoNormal"><b><span style="color:black">From:</span></b><span style="color:black"> Steve Kirby <<a href="mailto:sackirby@chinaautogroup.com" target="_blank" rel="noreferrer">sackirby@chinaautogroup.com</a>><br>
<b>Sent:</b> Sunday, September 13, 2020 3:50 PM<br>
<b>To:</b> David Friedlander <<a href="mailto:forzion7@gmail.com" target="_blank" rel="noreferrer">forzion7@gmail.com</a>><br>
<b>Cc:</b> Tom Mulligan <<a href="mailto:nute_shop@hotmail.com" target="_blank" rel="noreferrer">nute_shop@hotmail.com</a>>; TR3 Triumphs <<a href="mailto:triumphs@autox.team.net" target="_blank" rel="noreferrer">triumphs@autox.team.net</a>>; New England Triumphs <<a href="mailto:net@newenglandtriumphs.org" target="_blank" rel="noreferrer">net@newenglandtriumphs.org</a>><br>
<b>Subject:</b> Re: [TR] [NET] Small coolant leak</span> <u></u><u></u></p>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
</div>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">They all leak. Bad design from day one. You can try removing it, disassembling it and lapping the mating surfaces with valve lapping compound.<u></u><u></u></p>
<div id="m_-7545487272723173195m_-3794611960004115646x_AppleMailSignature">
<p class="MsoNormal">Steve Kirby<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
On Sep 13, 2020, at 12:09 PM, David Friedlander <<a href="mailto:forzion7@gmail.com" target="_blank" rel="noreferrer">forzion7@gmail.com</a>> wrote:<u></u><u></u></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class="MsoNormal">Hey Tom ~ Thanks! I needed the laugh. Maybe I should 'avoid the rush' and just install a pipe plug now...
<span style="font-family:"Segoe UI Emoji",sans-serif">😊</span> <u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Dave<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<div>
<p class="MsoNormal">On Sun, Sep 13, 2020, 2:42 PM Tom Mulligan <<a href="mailto:nute_shop@hotmail.com" target="_blank" rel="noreferrer">nute_shop@hotmail.com</a>> wrote:<u></u><u></u></p>
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<blockquote style="border:none;border-left:solid #cccccc 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Oh, And if you get the leak to stop it will eventually clog up solid with crud and never leak (or drain) again.<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Tom<u></u><u></u></span></p>
</div>
<div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><u></u> <u></u></span></p>
</div>
<div class="MsoNormal" align="center" style="text-align:center">
<hr size="2" width="98%" align="center">
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<div id="m_-7545487272723173195m_-3794611960004115646x_m_5103154968378164698divRplyFwdMsg">
<p class="MsoNormal"><b><span style="color:black">From:</span></b><span style="color:black"> NET <<a href="mailto:net-bounces@newenglandtriumphs.org" target="_blank" rel="noreferrer">net-bounces@newenglandtriumphs.org</a>> on behalf of David Friedlander via NET <<a href="mailto:net@newenglandtriumphs.org" target="_blank" rel="noreferrer">net@newenglandtriumphs.org</a>><br>
<b>Sent:</b> Sunday, September 13, 2020 2:21 PM<br>
<b>To:</b> TR3 Triumphs <<a href="mailto:triumphs@autox.team.net" target="_blank" rel="noreferrer">triumphs@autox.team.net</a>>; New England Triumphs <<a href="mailto:net@newenglandtriumphs.org" target="_blank" rel="noreferrer">net@newenglandtriumphs.org</a>><br>
<b>Subject:</b> [NET] Small coolant leak</span> <u></u><u></u></p>
<div>
<p class="MsoNormal"> <u></u><u></u></p>
</div>
</div>
<div>
<div>
<p class="MsoNormal">I have noticed a small coolant leak from my TR3 and have traced it to the handle assembly of the water drain tap on the side of the block. Anyone else had this issue? It's a new tap and don't know what the fix might be. It's not leaking
from where the tap threads into the block... Thanks in advance for any BTDT advice...
<u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Dave<u></u><u></u></p>
</div>
</div>
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</blockquote>
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