<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>That would depend on what the cam and rocker manufacturers say. They usually have a spec to use with their parts. A WAG on my part would be 0.015 in.</div><div><br></div><div>The valves on my shiny new '72 Midget were set to 0.006 in. One of the many things I found that explain why the previous owner couldn't get it to run right. :-)<br><br>Sent from my keyboard</div><div><br>On Oct 31, 2015, at 4:49 PM, Michael MacLean <<a href="mailto:rrengineer.mike@att.net">rrengineer.mike@att.net</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:16px"><div id="yui_3_16_0_1_1446323015003_17729">How about when you have 1.5 rocker arms? Drove the Bugeye around yesterday. Runs great, still blue smoke on acceleration on a recent rebuild. At leat 1000 miles since rebuild. I'm afraid the rings never seated properly. Not sure of the cylinder wall surface during the rebuild as I did not so that part of it.<br></div><div id="yui_3_16_0_1_1446323015003_17730" dir="ltr">Mike MacLean<br></div><div id="yui_3_16_0_1_1446323015003_17731"><span></span></div> <br><div class="qtdSeparateBR"><br><br></div><div style="display: block;" class="yahoo_quoted"> <div style="font-family: times new roman, new york, times, serif; font-size: 16px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"> <font face="Arial" size="2"> On Saturday, October 31, 2015 1:26 PM, Rick Fisk via Spridgets <<a href="mailto:spridgets@autox.team.net">spridgets@autox.team.net</a>> wrote:<br> </font> </div> <blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px; padding-left: 5px;"> <br><br> <div class="y_msg_container"><div id="yiv3068736433"><div><div>The 0.029 in. spec is a whole different thing used when you are assembling the engine. If your engine is together and you just want to set the valve clearance it should be 0.012 in. set cold.<br clear="none"><br clear="none">Sent from my keyboard</div><div class="yiv3068736433yqt3461902488" id="yiv3068736433yqt61360"><div><br clear="none">On Oct 31, 2015, at 4:06 PM, Michael Rowe via Spridgets <<a rel="nofollow" shape="rect" ymailto="mailto:spridgets@autox.team.net" target="_blank" href="mailto:spridgets@autox.team.net">spridgets@autox.team.net</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div>
</div></blockquote></div></div><div class="yiv3068736433yqt3461902488" id="yiv3068736433yqt64797"><style></style></div><div><div class="yiv3068736433yqt3461902488" id="yiv3068736433yqt61805"><div><font face="Arial">New 1275 engine.</font></div>
<div><font face="Arial">Haynes says "Rocker clearance, timing only = 0.029
in.</font></div>
<div><font face="Arial">My mechanic/tutor says, "that is twice what it should
be."</font></div>
<div><font face="Arial">Bentley says:</font></div>
<div><font face="Arial">Rocker clearance: Running (Standard) = 0.012 in.
cold</font></div>
<div><font face="Arial">
Running (competition work) = 0.015 in.</font></div>
<div><font face="Arial">
timing = 0.029 in.</font></div>
<div><font face="Arial">Online sites agree on = .012 in.
cold.</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">So what is the 0.029 in. for?</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">Michael Rowe</font></div></div>
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