[Healeys] Radiator caps

[BJ8Healeys]

The BJ7/BJ8 Mechanical Service List, on Page MC2, shows two applicable
radiator caps, Part Numbers ARH 1542 and  ARH 1662, with the remark that for
ARH 1542 "W.S.E use ARH 1662"  (when stock exhausted).  That would seem to
agree with what is stated in the Anderson - Moment book about a change in
cap pressure:  "...during BJ8 production, the 7-pound cap was replaced in
production by a 10-pound cap with similar appearance.  Later parts lists
instructed dealers to substitute a 10-pound cap as stocks of the earlier
caps were exhausted."

It sure would be nice if someone had the technical specs for the part
numbers.  There is a difference in the two caps, and it may be the pressure
rating.  But it could also be anything else, too.  Since the 7-lb cap was
good for the earlier models and the early BJ8s, I guess the suppliers didn't
see any reason to manufacture a 10-lb cap just to agree with the parts list.

Steve Byers
HBJ8L/36666
BJ8 Registry
Havelock,NC  USA



-----Original Message-----
From: healeys-bounces+sbyers=ec.rr.com at autox.team.net
[mailto:healeys-bounces+sbyers=ec.rr.com at autox.team.net]On Behalf Of
E.A. Driver
Sent: Thursday, October 04, 2007 9:07 PM
To: Austin Healey list
Subject: [Healeys] Radiator caps


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