stevenphillips Posted July 9, 2022 Report Share Posted July 9, 2022 Hi All Sorry for the question but whilst out taking my son to his Prom in the 6 I noticed at the end of the day the expansion bottle pishing out water and it seems the radiator cap seal has finally given up so need a new one. My question is that as I have found 7lbs and 9lbs replacements which should I use ? I dispatch on this forum but seems that question has not cone up before. Love and stuff Steve, thanks for all replies Quote Link to post Share on other sites
stevenphillips Posted July 9, 2022 Author Report Share Posted July 9, 2022 Or even a 13lbs that I've just seen Quote Link to post Share on other sites
RobH Posted July 9, 2022 Report Share Posted July 9, 2022 (edited) You need to use google rather than the forum search Steve - I used "TR register radiator pressure cap " as the search term and got a number of hits, including this discussion which I think answers your question (click on the arrow to view it): Edited July 9, 2022 by RobH Quote Link to post Share on other sites
Mike C Posted July 9, 2022 Report Share Posted July 9, 2022 Mine's always been 13 psi , if that helps. Quote Link to post Share on other sites
cp25616 Posted July 9, 2022 Report Share Posted July 9, 2022 Always run mine on 13 psi whatever be it TR5 or TR6, and no problems. Alan G Quote Link to post Share on other sites
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