pethier Posted November 22, 2023 Share Posted November 22, 2023 (edited) I am trying to find the correct radiator cap for my 1700 Super Sprint. The radiator cap goes on the top of the thermostat housing. It is the highest part of the system. The overflow expansion reservoir is plastic and open to the atmosphere. It is lower than the radiator cap. In theory, coolant should suck back into the system when the car is parked and cools. This is not happening because the cap lacks the larger second seal. The second way that this is the wrong cap is that the pressure seal is too short to seal. When you put a cap on, you should feel the spring pushing back. I don't. Does anyone know what cap to ask for? If anyone has a functioning 1700 Super Sprint with an unpressurized coolant tank, please tell me numbers and brand names on the radiator cap. Edited November 22, 2023 by pethier Link to comment Share on other sites More sharing options...
IamScotticus Posted November 23, 2023 Share Posted November 23, 2023 (edited) The Thermostat housing used by Cat should be the same as that sold on Burton Power. The cap they say that is compatible is thier part number FC52. Here is the compatability list: Ford Capri Classic 1961-64 Ford Capri Mk1/Mk2/Mk3 1969-1987 including 2.8 & 3.0 V6 Ford Consul Classic 1961-63 Ford Corsair 1963-1970 Ford Cortina Mk1/Mk2 including Lotus Twin Cam 1962-1970 Ford Cortina Mk3/Mk4/Mk5 1970-1982 Ford Escort Mk1 1968-1974 including Twin Cam, RS1600, Mexico & RS2000 Ford Escort Mk2 1975-1980 including RS2000 & Mexico Ford Escort Mk3 1980-1985 Ford Fiesta Mk2 1983-11/1985 Ford Granada Mk1 1972-1977 Ford Granada Mk2 1977-1985 Ford Orion Mk1 1983-1985 Ford Sierra 1982-11/1985 Ford Taunus 12M P4 1962-1966 Ford Taunus 12M P6 1966-1970 Ford Taunus 15M P6 1966-1970 Ford Taunus 17M P5 1964-1967 Ford Taunus 17M P7 1967-1971 Ford Transit Mk1 1965-1978 Ford Transit Mk2 1978-1985 Ford Transit Mk3 1986-1991 Ford Transit Mk4 1991-1994 https://www.burtonpower.com/radiator-cap-metal-type-fc52.html Edited November 23, 2023 by IamScotticus Link to comment Share on other sites More sharing options...
pethier Posted November 23, 2023 Share Posted November 23, 2023 Thanks! Link to comment Share on other sites More sharing options...
IamScotticus Posted December 20, 2023 Share Posted December 20, 2023 Heres some good reading on pressure caps https://icemancooling.com/2011/01/14/radiator-caps/ https://icemancooling.com/2011/01/17/radiator-caps-continued/ Link to comment Share on other sites More sharing options...
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