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[Healeys] BJ8 Cooling System

Subject: [Healeys] BJ8 Cooling System
From: ahbn6 at verizon.net (John Sims)
Date: Sun, 22 May 2011 16:47:14 -0400
References: <130471A9-6340-4394-A7D4-63BBAB51DD41@comcast.net> <9F0B0491C4B74327A69FCE9338505F3A@KagsLaptop>
Why not just buy a bypass thermostat. British Car Specialists has them.

John Sims, BN6
Aberdeen, NJ
 
http://www.healey6.com


-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at 
autox.team.net]
On Behalf Of Earl Kagna
Sent: Sunday, May 22, 2011 4:17 PM
To: Schneider Mark; healeys at autox.team.net
Subject: Re: [Healeys] BJ8 Cooling System

Mark:

You're close.  As I understand it, the bypass function on the engine is
designed to block (mostly) the bypass hole to the head with the sleeve on
the thermostat in order to speed up the warm-up.  This is what I learned
when experimenting with sleeving regular thermostats years ago.  I
understand that reproductions of the original Smiths (sleeved) thermostat
are now available, but I have not checked.

In other words, it's no big deal to run a current (cheap) thermostat - we've
all been doing it for a long time.

If some other list guru wants to correct this if I've got it wrong, or
expand on this, please help out.

Hope the fan blade did minimal damage - I've heard some horror stories!

Earl Kagna
Victoria, B.C.
BJ8, BT7 tri-carb

-----Original Message-----
From: Schneider Mark
Sent: Sunday, May 22, 2011 12:57 PM
To: healeys at autox.team.net
Subject: [Healeys] BJ8 Cooling System

A couple of weeks ago I lost a blade off of the radiator fan.   Boy, was
that
exciting!  I decided to use the opportunity to thoroughly inspect and test
all components of the cooling system.  Anything I found with a problem I
replaced.
Obviously, the fan is first on the list.   As I read an information tech
sheet
associated with the one source of the Texas Cooler I came across something
about which I would appreciate some lister input.  The article points out
that the big Healey cooling system design has a bypass that circulates
coolant through the engine until the thermost  at opens.  If one is using an
after market, non-sleeved, regular type of thermostat which remains closed
until reaching temperature, there is no flow through the radiator core.  Do
I have this right?  The article suggest drilling a couple of small holes in
the rim of the thermostat to allow a small amount of flow until the
thermostat fully opens.  In all the years I have owned a Healey I had never
heard of this before.  What is the experience of the list members???

Marks 3

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