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--></style></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>All you really need to do is to not top off the radiator coolant. Keep the coolant level 1” to 1-1/2” or possible a little more below the point where the radiator cap seals the top of the radiator chamber will allow enough space for the coolant to expand and contract without sending coolant through the overflow tube.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Best - John <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Healeys <healeys-bounces@autox.team.net> <b>On Behalf Of </b>Michael Oritt via Healeys<br><b>Sent:</b> Saturday, October 11, 2025 4:02 PM<br><b>To:</b> sbyers@ec.rr.com<br><b>Cc:</b> Healeys <healeys@autox.team.net><br><b>Subject:</b> Re: [Healeys] Radiator cap with expansion tank.<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='color:#3333FF'>By running the hose from the radiator neck to the <b><i>bottom</i></b> of the "expansion" tank you will have created a coolant recovery system--the slight vacuum created in the radiator by the engine's cooling down pulls open and unseals the pressure plate on the radiator cap, thus "recovering" the overflow back into the radiator. Probable result: no more coolant on the garage floor and no need to top things off. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:#3333FF'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='color:#3333FF'>Best--Michael Oritt<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Sat, Oct 11, 2025 at 2:24<span style='font-family:"Arial",sans-serif'> </span>PM sbyers--- via Healeys <<a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt'>Simon, I have an expansion tank in my BJ8 using the original metal tank from an MG Midget. I also have the stock 7 psi cap on both the radiator and the overflow tank and a clear “overflow” hose on the radiator neck to the tank. The tank captures any overflow from the radiator and I can see the system operate with the clear tubing. When hot, the flow is out to the tank and back into the radiator as it cools. Excess coolant in the overflow tank can flow out to the ground through the tank overflow connection.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt'>Steve Byers</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt'>BJ8 Registry</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt'>AHCA Delegate at Large</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Healeys <<a href="mailto:healeys-bounces@autox.team.net" target="_blank">healeys-bounces@autox.team.net</a>> <b>On Behalf <span class=m4813553479534083906grame>Of</span> </b>Simon Lachlan via Healeys<br><b>Sent:</b> Saturday, October 11, 2025 11:32 AM<br><b>To:</b> 'Healeys' <<a href="mailto:healeys@autox.team.net" target="_blank">healeys@autox.team.net</a>><br><b>Subject:</b> [Healeys] Radiator cap with expansion tank.</span><o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p><span lang=EN-GB>Forgive another stupid question but it’s sensible to be sure……….</span><o:p></o:p></p><p><span lang=EN-GB>Am I right in assuming(!) that, if one fits an expansion tank, the standard cap is moved from the radiator to the expansion tank and is replaced by a blanking(?) cap ie one which has no spring, no means of relief etcetc? Seem logical to me but logic has let me down before.</span><o:p></o:p></p><p><span lang=EN-GB>Simon</span><o:p></o:p></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'>_______________________________________________<br>Support Team.Net <a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a><br>Suggested annual donation $12.75<br><br>Archive: <a href="http://www.team.net/pipermail/healeys" target="_blank">http://www.team.net/pipermail/healeys</a> <a href="http://autox.team.net/archive/healeys" target="_blank">http://autox.team.net/archive/healeys</a><br><br><a href="mailto:Healeys@autox.team.net" target="_blank">Healeys@autox.team.net</a><br><a href="http://autox.team.net/mailman/listinfo/healeys" target="_blank">http://autox.team.net/mailman/listinfo/healeys</a><br><br>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/healeys/michael.oritt@gmail.com" target="_blank">http://autox.team.net/mailman/options/healeys/michael.oritt@gmail.com</a><o:p></o:p></p></div></blockquote></div></div></body></html>