<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=us-ascii"><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;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Rick<o:p></o:p></p><p class=MsoNormal>First I would ask the engine builder about this problem – see what he has to say.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It is very possible that the rope seal needs to heat cycle - again ask the engine builder.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Tom Monroe’s book about rebuilding a small block Ford states to use some RTV on the rear main too. Ask the engine builder if he used RTV there.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I had a small leak at the rear main so I dropped the pan, removed the rear bearing cap and put some more RTV along the edges seems to have worked OK. You probably should only lower the bearing cap a little bit if you decide to add RTV to the edges<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Understand that when the engine is in position there is not a wall of oil against the bearing cap. There is oil from the pump at the bearing and some splashing oil from the crank assembly and the drains but the oil sump height does not go back to the bearing or near the block level – the oil is mostly in the deep sump of the pan.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>At 45 degrees there is a wall of oil against the bearing cap and block that is not normally there – this could be part of the problem.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hope this helps<o:p></o:p></p><p class=MsoNormal>Ron Fraser<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Tigers <tigers-bounces@autox.team.net> <b>On Behalf Of </b>Richard Hyatt via Tigers<br><b>Sent:</b> Sunday, August 11, 2019 3:37 PM<br><b>To:</b> tigers@autox.team.net<br><b>Subject:</b> [Tigers] rear main seal leak<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>HI,<o:p></o:p></p><p class=MsoNormal>I have just had my engine rebuilt at a well known engine builder. Before it could be installed I had a rapidly leaking rear main seal. Got it back, tilted it up for a top installation and yep…still leaks. Slower. This time with a rope aeal. Will it seat and get better or should it go back again. I have the whole engine /transmission assy. tilted at about a 45 degree angle waiting to see how bad the leak is. Any ideas or comments about the rear main seal?<o:p></o:p></p><p class=MsoNormal>Thanks. Rick<o:p></o:p></p></div></body></html>