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
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