[Healeys] Radiator caps

[E.A. Driver]

A review of the "SC Parts Group Ltd.: Parts and Accessories BN1-BJ8" catalogue, some
300 pages in length, indicates that early BN1 used a radiator cap of 4 psi while later BN1 and BN2
called for 7 psi radiator cap. They list for BN4 to end of BJ8 a 7 psi cap.  Only one radiator
cap is available  from Cape International for BN4 to BJ8, it is rated at 7 psi.

In a lengthy review of the factory shop manual for 100-six and 3000 from '56 through '67 ;
the Haynes manual for the same model series; and the driver's handbooks for the same
series of models , only the BN4 (100-six) owners handbook mentions psi of the radiator
" a pressure relief valve located in the radiator filler cap, opens at approximately 4 lbs. per sq. 
in."
Therefore, the earlier advice suggesting  that the maximum psi be 7 psi for a radiator cap seems
to me to be most reasonable until someone can produce actual documentation to the
contrary.

Kind regards
Ed
Saskatoon, Saskatchewan, Canada
'53 BN1 '65 BJ8  '89 Morgan 4/4