<html xmlns:v="urn:schemas-microsoft-com:vml" 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)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><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:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style></head><body lang=EN-US link=blue vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>After looking at the picture Mark sent I believe we are both right. The fitting I have is different than Marks picture. Mine has more threads and is tapered on the side that screws into the block. My theory is the picture Mark sent is the standard 1/8 BSPP fitting used with a copper crush washer as shown in the Service Parts List. My car was manufactured in Nov 1960 and I suspect there was a shortage of BSPP fittings and BSPT was substituted for a short period and the substitution never mentioned in the Service Parts List. Given the unique style of this fitting I doubt mine was changed at some point post production.</p><p class=MsoNormal>I will use sealer on the threads and 2 turns past finger tight and monitor for any leaks.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks for all your input.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Harold<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:ardmorebusiness@xtra.co.nz">Mark Donaldson</a><br><b>Sent: </b>Sunday, May 29, 2022 9:58 PM<br><b>To: </b><a href="mailto:manifold@telus.net">Harold Manifold</a>; <a href="mailto:m.g.sharp@sympatico.ca">m.g.sharp@sympatico.ca</a>; <a href="mailto:healeys@autox.team.net">Ken Fleming via Healeys</a><br><b>Subject: </b>RE: [Healeys] Union - oil gauge pipe</p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-NZ style='font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#1F497D'>Harold,</span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-NZ style='font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#1F497D'>I agree with Mirek. I’ve checked both of my spare 3000 blocks, and a Wolseley 6/110 block. All have the ½” straight union.</span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-NZ style='font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#1F497D'>That yours is tapered suggests it has perhaps been modified at some time.</span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-NZ style='font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#1F497D'> </span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-NZ style='font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#1F497D'>Mark</span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-NZ style='font-size:10.0pt;font-family:"Tahoma",sans-serif;color:#1F497D'>Ardmore, NZ</span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-NZ style='font-family:"Tahoma",sans-serif;color:#1F497D'> </span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-NZ style='font-family:"Tahoma",sans-serif;color:#1F497D'><img border=0 width=430 height=358 style='width:4.4791in;height:3.7291in' id="_x0000_i1027" src="cid:image001.jpg@01D87409.B2888A10"></span><span lang=EN-NZ style='font-family:"Tahoma",sans-serif;color:#1F497D'> <img border=0 width=514 height=354 style='width:5.3541in;height:3.6875in' id="Picture_x0020_4" src="cid:image005.jpg@01D87409.B2888A10"> </span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-NZ style='color:#1F497D'> </span><span lang=EN-NZ><o:p></o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Harold Manifold <manifold@telus.net> <br><b>Sent:</b> Monday, 30 May 2022 5:24 AM<br><b>To:</b> m.g.sharp@sympatico.ca; Ken Fleming via Healeys <healeys@autox.team.net><br><b>Subject:</b> Re: [Healeys] Union - oil gauge pipe<span lang=EN-NZ><o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-NZ> <o:p></o:p></span></p><p class=MsoNormal>After the comments I checked the measurement of the fitting. The pitch is 28 TPI and the major diameter at the top is 0.402” and 0.372” at the bottom. The measured taper is very close to the 16:1 for BSPT. These measurements fit very closely to a 1/8” BSPT except the measured major diameter is more than the 0.383” listed for BSPT.<span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal> <span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal>The hole in the block is tapered as well. <span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal> <span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal>I will check the threads in the block to see if they are clean and in good shape. I am quite sure these are original parts, are there some other obsolete British tapered fittings slightly larger than BSPT? Whatever size this fitting is it won’t be easily replaced or repair and I will be very careful with it.<span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal> <span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal>Harold<span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal> <span lang=EN-NZ><o:p></o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From: </b><a href="mailto:m.g.sharp@sympatico.ca">m.g.sharp@sympatico.ca</a><br><b>Sent: </b>Sunday, May 29, 2022 8:14 AM<br><b>To: </b><a href="mailto:manifold@telus.net">Harold Manifold</a>; <a href="mailto:healeys@autox.team.net">Ken Fleming via Healeys</a><br><b>Subject: </b>RE: [Healeys] Union - oil gauge pipe<span lang=EN-NZ><o:p></o:p></span></p></div><p class=MsoNormal> <span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA>I am quite sure the thread into the block is straight, not tapered. The adaptor should screw up hard onto the copper washer. The thread may be bunged up with crud, so measure the thread on the adaptor and carefully run a tap down the hole in the block. If it starts cutting metal, I’d stop and figure it out, but I bet it will just clean up the threads and the adaptor will screw in.</span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA> </span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA>Cheers, Mirek</span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA> </span><span lang=EN-NZ><o:p></o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Healeys <<a href="mailto:healeys-bounces@autox.team.net">healeys-bounces@autox.team.net</a>> <b>On Behalf Of </b>Harold Manifold<br><b>Sent:</b> May 28, 2022 9:51 PM<br><b>To:</b> Ken Fleming via Healeys <<a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a>><br><b>Subject:</b> [Healeys] Union - oil gauge pipe<span lang=EN-NZ><o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-CA> </span><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal>Hello,<span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal> <span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal>I would like some clarification about the “Union - oil gauge pipe” before I over tighten and break something. Number 56 in the picture below. The threads going into the block are definitely tapered, however, the Union gets tight before sealing against the washer (No. 57). I don’t want to over tighten and damage the threads as I suspect the threads are not a standard size. I was thinking of using two copper washers and thread sealant.<span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal> <span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal>Any other suggestions?<span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal> <span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><img border=0 width=288 height=265 style='width:3.0in;height:2.7604in' id="Picture_x0020_3" src="cid:image004.jpg@01D87445.DA43EE00"><span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal> <span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal>Harold<span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal> <span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal> <span lang=EN-NZ><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>