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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Regarding Rule of Nine, I understand having 8 all the way up to set 1. But there is a significant rotation between “real close to the top” in front of, and after TDC. This can be seen with rotation the engine and seeing very little to no movement. Also, if I am not mistaken 8 TDC is not perfectly in line with BDC of 1; there is a bias. This means that when 8 is TDC, 1 is not absolutely BDC ready for measurement. So the question is, how do you ensure, with all of that slop, that you truly have BDC?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>TIA,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Clayton<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><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> PaulHunt73 [mailto:paulhunt73@virginmedia.com] <br><b>Sent:</b> Monday, May 18, 2015 12:25 AM<br><b>To:</b> crk@godblessthe.us; mgacars@yahoogroups.com; mgs@autox.team.net<br><b>Subject:</b> Re: [Mgs] tappet question<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman",serif'>Depends on the figure you used. Workshop Manual quotes 15 thou, cold. I don't like hot as the engine is continually cooling while I'm doing it. I use 14 thou which is loose and 16 thou which is lightly pinched so I can get a better feel for it as I only check them very rarely. As far as I know it really only makes a difference if the engine gets so hot that the gaps close up and you get combustion seepage past not quite closed valves, which burns them. Any loss of performance is only secondary.</span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman",serif'>In the early years not only did I find I was adjusting them every year, sometimes opening them and sometimes closing them, but also getting repeatable gaps from one turn of the engine to the next was a problem. Then I discovered that at the strict rule of nine (RON) points, several of the valves were still changing gap. Some of them had the biggest gap before RON and some after. Since discovering that perhaps 15 years or go or more I've never had to alter them until I changed the head gasket last year, so hadn't been checking tem every year anyway.</span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman",serif'>PaulH</span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p></o:p></span></p></div><blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>----- Original Message ----- <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'> <o:p></o:p></span></p></div><p class=MsoNormal>When I went to reset the tappet clearance, I found the old settings rather sloppy. I reset them so that the gauge was snug – it slid in but it definitely tight. Which is correct? I know that it makes a difference on performance and full combustion. Yes, I did the checking while hot.<o:p></o:p></p></blockquote></div></body></html>