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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=DE>Hi Dave,<o:p></o:p></span></p><p class=MsoNormal><span lang=DE><o:p> </o:p></span></p><p class=MsoNormal>these shims need to be hardened steel.<o:p></o:p></p><p class=MsoNormal>On my TR4 I use no shims. The cast iron is a good surface for spring rotation.<o:p></o:p></p><p class=MsoNormal>On the TR8 with the aluminum head there are shims. The first set was squeezed out after a few races, they were too soft.<o:p></o:p></p><p class=MsoNormal><img width=304 height=316 style='width:3.1666in;height:3.2916in' id="Grafik_x0020_1" src="cid:image001.jpg@01D615B1.DA132210"><o:p></o:p></p><p class=MsoNormal><img width=307 height=374 style='width:3.1979in;height:3.8958in' id="Grafik_x0020_2" src="cid:image002.png@01D615B1.DA132210"><o:p></o:p></p><p class=MsoNormal>The second set of shims was nitrate hardened and they last.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Cheers<o:p></o:p></p><p class=MsoNormal>Chris<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 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=DE>Von:</span></b><span lang=DE> Fot <fot-bounces@autox.team.net> <b>Im Auftrag von </b>DAVE HOGYE via Fot<br><b>Gesendet:</b> Samstag, 18. April 2020 17:33<br><b>An:</b> Friends of Triumph <Fot@autox.team.net><br><b>Betreff:</b> [Fot] valve shims and springs<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333'>Hello Friends, <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333'>I've removed and disassembled my TR3 engine after 7 years, 19 race events and about 5500 miles since it's completion. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333'>The crank and cam look excellent as do the bearings, both mains and rods. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333'>One thing I found was that some of the valve spring shims were disintegrating. There are two different types of shims, one golden/yellow and one plain silver. The problem is that the silver ones are heavily worn from the springs tearing them up. The golden yellow shims look as installed, with no visual wear and they don't seem to have been rotating. It obvious the springs over the silver shims were rotating and causing the heavy wear. Perhaps these shims are too soft. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333'>Can someone enlighten me on this? <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333'>In the garage on lockdown, <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333'>Dave H. <o:p></o:p></span></p></div></div></body></html>