<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Aptos;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:12.0pt;
font-family:"Aptos",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-ligatures:standardcontextual;
mso-fareast-language:EN-US;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Aptos",sans-serif;
color:windowtext;}
span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:"Calibri",sans-serif;}
.MsoChpDefault
{mso-style-type:export-only;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style></head><body lang=EN-CA link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoPlainText>Seems to me those machine screws had lock washers under the head and maybe hard to tell, but your picture seems to not show a washer.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Keith<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Keith Stewart<o:p></o:p></p><p class=MsoPlainText><a href="mailto:keithstewart@bell.net">keithstewart@bell.net</a><o:p></o:p></p><p class=MsoPlainText>World of Triumph <a href="https://keith-stewart.ca/">https://keith-stewart.ca/</a> <o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Don Hiscock <don.hiscock@gmail.com> <br><b>Sent:</b> October 6, 2025 1:20 PM<br><b>To:</b> Triumphs list <triumphs@autox.team.net><br><b>Subject:</b> [TR] Which threadlocker color for wet-liner four AC fuel pump diaphragm cover screws?<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>For some unknown reason, after ten years or more in the TR3B the machine screws that hold down the top of the diaphragm cover on the original AC fuel pump have started working loose as the car is driven. Gasoline then seeps slowly from the edge of the diaphragm due to the pressure head in the tank. Very odd. The first time I was willing to chalk up to a one-off. But now it's a trend. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>There's only so tight one wants go go on those screws without distorting the diecasting, and I'm probably a little past where I feel comfortable now.<br><br>Seems like a case for a threadlocking compound. I'm guessing purple Locktite might do the trick -- it shouldn't take much. Has anyone been down this road ahead of me?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="https://photos.smugmug.com/photos/i-QWD7M6q/0/KGTMZ64Lk6ZV6VHFPGR8PKkQNJvmJHxd74ZVFkQLS/X5/i-QWD7M6q-X5.jpg">https://photos.smugmug.com/photos/i-QWD7M6q/0/KGTMZ64Lk6ZV6VHFPGR8PKkQNJvmJHxd74ZVFkQLS/X5/i-QWD7M6q-X5.jpg</a><o:p></o:p></p></div></div></div></body></html>