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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>It has been a number of years since I have had the need to do a through cleaning and flush of the coolant system, my earlier 71BGT being one car in particular. So I am not sure how dated this is but there is or was a cleaning kit available at car parts stores that contained oxalic acid (crystalline form) that was poured into the radiator. Then the car was driven for 10-15 minutes, the coolant drained, and the system flushed. There was also a flush kit available from Prestone that introduces a tee in the heater to engine block hose that allows you to connect a water hose to it. With a hose connected and on, radiator cap removed, the system was flushed until the water was clear. I think the last time I used this method was on a Chevy S10 about 15 years ago. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>David Councill<o:p></o:p></p><p class=MsoNormal>1964 MGB<o:p></o:p></p><p class=MsoNormal>1967 MGBGT<o:p></o:p></p><p class=MsoNormal>1972 MGB<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b>From:</b> Mgs <mgs-bounces@autox.team.net> <b>On Behalf Of </b>Richard Lindsay via Mgs<br><b>Sent:</b> Thursday, May 09, 2019 8:16 AM<br><b>To:</b> PaulHunt73 <paulhunt73@virginmedia.com><br><b>Cc:</b> wkilleffer@epbfi.com; mgs@autox.team.net List <mgs@autox.team.net><br><b>Subject:</b> Re: [Mgs] Coolant draining on an MGB<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>I've often wrestled with this. I usually flush debris out by running the engine and flowing water through. However, any system that flushes tends to put the output debris in the radiator! How about disconnecting the TOP hose, feeding fresh water into the radiator, and ducting the output from the waterpump into a bucket? Anyone tried this?<o:p></o:p></p></div><p class=MsoNormal><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-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p></blockquote></div></div></body></html>