Bob -
You know, I thought I understood all of this, but I may be all off. I think
what you are saying is correct.
I notice that the "Balanced" Sleeve Thermostat I have works exactly the
opposite of the "original" sleeved thermostat that Moss is selling.
The "balanced" sleeve thermostat opens the bypass port when it is hot, but
the "original" sleeved thermostat closes it off when hot.
If your description is correct, then this is telling me that I need to go
get one of these "original" sleeved thermostats.
I'll buy one of these and see how it works. At the very least the balanced
sleeve thermostat does improve cooling in my BJ8 significantly, even if it
does work backwards!
Regards,
Alan
'53 BN1 '64 BJ8
On 10/18/05, Bob Spidell <bspidell@comcast.net> wrote:
>
> Alan,
>
>
> re:
>
> > By blocking off the bypass port in the head, the sleeve thermostat
> allows
> > the head to heat up faster, allowing you to turn off your choke much
> faster
> > and getting the engine up to temperature much faster than with a
> standard
> > thermostat.
>
>
> I thought the bypass port was left open with the thermostat closed,
> allowing
> the coolant to circulate in the head? Then, when the thermostat opens it
> blocks the bypass port, forcing all/most coolant through the radiator.
>
>
> bs
> ***************************************************************
> Bob Spidell San Jose, CA bspidell@comcast.net
> '67 Austin-Healey 3000 '56 Austin-Healey 100M
> ***************************************************************
>
> Subject: Re: Thermostat Question
>
>
> > Jim -
> >
> > All 6 cylinder healeys have the "bypass" port in the head, although your
> > understanding of the process is a little bit incorrect.
> >
> > By blocking off the bypass port in the head, the sleeve thermostat
> allows
> > the head to heat up faster, allowing you to turn off your choke much
> faster
> > and getting the engine up to temperature much faster than with a
> standard
> > thermostat.
> >
> > Once open, the sleeve thermostats work much better than modern
> thermostats
> > because the sleeve pops below the bypass port, helping to prevent hot
> bypass
> > water from cycling backwards into the motor rather than going into the
> > radiator where it should (esp. at idle when the water pump is turning
> quite
> > slow).
> >
> > In addition, the sleeve thermostats have a significantly larger opening,
> > allowing much freer flow of coolant into the radiator.
> >
> > Your healey is designed to use this type of thermostat and I would
> highly
> > recommend it. It will help your car run much cooler on hot days and keep
> a
> > much steadier temperature under most conditions. In addition, your car
> will
> > warm up faster as well. All around it will work much better.
> >
> > I have one in my BJ8 in Hong Kong and I have no over-heating problems
> (very
> > hot and humid here).
> >
> > Best Regards,
> >
> > Alan
> >
> > '53 BN1 '64 BJ8
>
>
--
Alan
'53 BN1 '64 BJ8
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