<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">The 3.9 vs 4.0 is a head-fake on Rover’s part. Bore and stroke is identical but there are a few other differences that matter. Info on the differences here:<div class=""><a href="http://www.gomog.com/allmorgan/40difference.htm" class="">http://www.gomog.com/allmorgan/40difference.htm</a></div><div class=""><br class=""></div><div class="">The consistency of the design allowed me to use SD1 heads from a TR8 on a 4.0 block with cross-bolted mains, and use the front cover from the TR8 so I could use a distributor.</div><div class=""><br class=""><div class="">
<div class="">Duncan Charlton</div><div class="">Elgin, Texas USA</div><div class=""><br class=""></div><br class="Apple-interchange-newline">
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<br class=""><div><blockquote type="cite" class=""><div class="">On Oct 20, 2016, at 1:24 PM, Robert Deanes <<a href="mailto:rfdeanes@gmail.com" class="">rfdeanes@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">I believe that the sanctioning bodys (SCCA,etc.) limit the engine to the 3.9 in the rule book.Other clubs may let you do more, but the guys I know that race them ( besides the Canadian) run the max of 3.9.</div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Thu, Oct 20, 2016 at 1:16 PM, Duncan Charlton <span dir="ltr" class=""><<a href="mailto:duncan.charlton54@gmail.com" target="_blank" class="">duncan.charlton54@gmail.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Joe,<br class="">
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I suspect so. Sources I’ve looked at for Morgan spare parts only list one part number even though the Plus 8 was sold for 35 years with 3.5, 3.9, 4.0 and 4.6 liter engines. Rimmer Bros. in the UK sells over a dozen types of valve covers but only one size gasket. Summit sells the same gasket for the Buick 300 and 340 as well. I suspect you already know that the Oldsmobile version of the alloy block 3.5 had valve covers and heads that were quite different, so I’m pretty sure those gaskets would be different.<br class="">
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Duncan Charlton<br class="">
Elgin, Texas USA<br class="">
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> On Oct 19, 2016, at 4:40 PM, Joe Alexander <<a href="mailto:joealexandervintage@gmail.com" class="">joealexandervintage@gmail.com</a><wbr class="">> wrote:<br class="">
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> Chris, Paul, Ted, Jack,<br class="">
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> Starting with the 3.5 liter engine, do the larger disp. Rover Engines have the same Valve Cover?<br class="">
><br class="">
> Sean now has a mold for the 3.5 liter valve cover gasket in silicone.<br class="">
><br class="">
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</div></div>> <image1.JPG><br class="">
> Joe Alexander<br class="">
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</blockquote></div><br class=""><br clear="all" class=""><div class=""><br class=""></div>-- <br class=""><div class="gmail_signature" data-smartmail="gmail_signature"><div class="">rob deanes</div>
<div class="">TR Racer</div></div>
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