NigelH Posted January 4, 2020 Report Share Posted January 4, 2020 Hello to all, Happy New Year, Can anyone advise on a source of a new 'deeper' rad cap to fit the swan neck radiator. just bought cap 'that fits tr4' and its good 10mm too shallow so the lower seal doesn't reach the rad filler face. Checked Rimmer Bros and they quote a 3/4" and 1", but not sure even 1 inch will be deep enough to seal? Advice , guidance really appreciated.. Nigel. Quote Link to post Share on other sites
RogerH Posted January 4, 2020 Report Share Posted January 4, 2020 (edited) Hi Nigel, The AC Delco cap RC-1 (Moss GRC101) is a fraction under 1" from the external top surface to the bottom on the lower seal. This is also correct for the TR4A Roger Edited January 4, 2020 by RogerH Quote Link to post Share on other sites
Z320 Posted January 4, 2020 Report Share Posted January 4, 2020 21 mm works well on my 4A, got another with 18 mm - this is too short Quote Link to post Share on other sites
NigelH Posted January 5, 2020 Author Report Share Posted January 5, 2020 Thanks Guys, Was investigating a water loss issue and realised the existing cap just isn't deep enough to even seal the rad.! Have ordered the Moss part.. Quote Link to post Share on other sites
Z320 Posted January 5, 2020 Report Share Posted January 5, 2020 (edited) Hi Nigel, you are welcome. What lenght did you order now? Ciao, Marco Edited January 5, 2020 by Z320 Quote Link to post Share on other sites
NigelH Posted January 5, 2020 Author Report Share Posted January 5, 2020 Hi Marco. Ive ordered the 1" deep, measured from the bottom of the cap. I believe now my car as bought, has an older rad fitted, as the car is a 64 and should have a conventional rad as its after CT9553? When the Rad was changed. Quote Link to post Share on other sites
Z320 Posted January 6, 2020 Report Share Posted January 6, 2020 Hi Nigel, this is why it's always the best to measure yourself on your car AND measure what you get delivered, I ordered 3/4" (22 mm) and got 18 mm, what ever car this has been made for. Ciao, Marco Quote Link to post Share on other sites
RAHTR4 Posted January 6, 2020 Report Share Posted January 6, 2020 Hi Nigel, The TR4 was fitted with two types of cap. AC RC4 4lbs, the part catalogues state this cap had an overall height of 0.96” AC RC1 7lbs, the parts catalogues state this cap had an overall height of 1.2” The fitting information on the side of the box appears to round up the dimensions. Regards, Richard Quote Link to post Share on other sites
NigelH Posted January 7, 2020 Author Report Share Posted January 7, 2020 Thanks Richard, Quote Link to post Share on other sites
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