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--></style></head><body lang=EN-US style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>I trying put together a time line for various types of thermostats used in the 6 cylinder Healey’s. The end goal is to see when the sleeve to cover the bypass opening was dropped and when the alcohol type bellows was replaced with a wax type thermostat.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I found this entry in the service parts manual but can’t find any reference to what a <span style='font-size:10.0pt;font-family:"Arial",sans-serif'>11K399 was.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=828 style='width:621.0pt;border-collapse:collapse'><tr style='height:12.75pt'><td width=64 nowrap valign=bottom style='width:48.0pt;padding:.75pt .75pt 0in .75pt;height:12.75pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>Jul-59</span><o:p></o:p></p></td><td width=764 nowrap valign=bottom style='width:573.0pt;padding:.75pt .75pt 0in .75pt;height:12.75pt'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>11K399 Com. (E) 29D-H3079 wax capsule thermostat 68°C.</span><o:p></o:p></p></td></tr></table><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>What was an 11K399? Was it a wax type thermostat with a sleeve to cover the bypass?<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Harold<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>