Iamscotticus Posted December 21, 2023 Share Posted December 21, 2023 Like mice, there are seemingly hundreds of different pressured expansion tanks available. If I find one I like to use, that suits the 7 well, but the OEM pressure cap is rated a higher bar/psi than the system I have, how do I locate the (plastic) cap that will fit the reservoir? For example, if the expansion tank I want to use is equipped with a 1.4 (21psi) bar cap, but for use on a Kent crossflow engine car I want a 1.1 bar (psi), Is there any thread and diameter system of standardization I can refer to to source the cap I want? I am aware that the Landrover Freelander PCF000030 reservoir used by Caterham is a 1.1 bar and I could be done with that. But I am looking more at a scuttle bulkhead mounted option, Dacia Duster 2171000QAA that comes with a higher rated pressure cap, as far as I can tell. I would want to find a lower pressure cap to fit. There are other options from Fiat and Citroën I like but the same cap pressure issue. This puzzle is more easily solved with bayonet style metal pressure caps as the three or four standardized neck sizes are well known. Thanks Link to comment Share on other sites More sharing options...
BigCol Posted December 23, 2023 Share Posted December 23, 2023 I have one of these in black as recommended by Stuart at Premier Power. Link to comment Share on other sites More sharing options...
Mrb00ns Posted December 23, 2023 Share Posted December 23, 2023 (edited) 1 hour ago, BigCol said: I have one of these in black as recommended by Stuart at Premier Power. What pressure cap Colin and was it a straight swap? (accepting that Stuart probably did it for you!). Edited December 23, 2023 by Mrb00ns Link to comment Share on other sites More sharing options...
BigCol Posted December 23, 2023 Share Posted December 23, 2023 38 minutes ago, Mrb00ns said: What pressure cap Colin and was it a straight swap? (accepting that Stuart probably did it for you!). Stuart’s recommendation was a Stant Motorad racing radiator cap, 21-25lb. 1 Link to comment Share on other sites More sharing options...
Iamscotticus Posted December 24, 2023 Author Share Posted December 24, 2023 Thanks I know the metal tanks. I could use one. I am trying to use a plastic one. Link to comment Share on other sites More sharing options...
7 wonders of the world Posted December 25, 2023 Share Posted December 25, 2023 Mines a bulkhead mounted bottle from a Fabia you can get a range of various rated pressure caps from here... https://presco-radiator-caps.com/ 1 Link to comment Share on other sites More sharing options...
Wrightpayne Posted December 26, 2023 Share Posted December 26, 2023 On 25/12/2023 at 06:05, 7 wonders of the world said: Mines a bulkhead mounted bottle from a Fabia you can get a range of various rated pressure caps from here... https://presco-radiator-caps.com/ Hopefully it doesnt come with a silica bag installed!! Link to comment Share on other sites More sharing options...
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