[Healeys] Radiator cap with expansion tank.

[sbyers at ec.rr.com]

Simon, I have an expansion tank in my BJ8 using the original metal tank from
an MG Midget.  I also have the stock 7 psi cap on both the radiator and the
overflow tank and a clear "overflow" hose on the radiator neck to the tank.
The tank captures any overflow from the radiator and I can see the system
operate with the clear tubing.  When hot, the flow is out to the tank and
back into the radiator as it cools.  Excess coolant in the overflow tank can
flow out to the ground through the tank overflow connection.
 
Steve Byers
BJ8 Registry
AHCA Delegate at Large
 
From: Healeys <healeys-bounces at autox.team.net> On Behalf Of Simon Lachlan
via Healeys
Sent: Saturday, October 11, 2025 11:32 AM
To: 'Healeys' <healeys at autox.team.net>
Subject: [Healeys] Radiator cap with expansion tank.
 
Forgive another stupid question but it's sensible to be sure....
Am I right in assuming(!) that, if one fits an expansion tank, the standard
cap is moved from the radiator to the expansion tank and is replaced by a
blanking(?) cap ie one which has no spring, no means of relief etcetc? Seem
logical to me but logic has let me down before.
Simon
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