[Healeys] Heater query

[Bob Spidell]

Note the brass valve on the block is quite fragile and if it hasn't been 
'exercised' recently it's likely stuck and you stand a good chance of 
snapping-off the small handle if you manhandle it. Moss has the complete 
valve at $150, and replacement handles are available. If it doesn't move 
easily I recommend soaking with a good penetrant oil and carefully 
applying some heat, and work it little-by-little (IIRC, the valve has 
the 'OFF' direction embossed in the body). A 10/32 machine screw will 
work as a handle in a pinch. IIRC, the valve has the 'OFF' direction 
embossed in the body near the handle.

Both valves on the 100s are large and robust, though still can get stuck 
due to corrosion.


On 7/10/2023 8:32 AM, Michael Salter wrote:
> Turning off the small valve on the side of the engine will only ensure 
> that the heater is most definitely OFF and will have no other 
> detrimental effects.
> The 100 has 2 such valves, one on the head and one on the water pump 
> and I always run with both turned off. My car is usually in winter 
> storage before it's cold enough to need the heater.
>
> M
>
> On Mon., Jul. 10, 2023, 10:41 a.m. Simon Lachlan via Healeys, 
> <healeys at autox.team.net> wrote:
>
>     I have a MkII BT7 with a normal Smith’s heater. Normal insofar as
>     it never seems to be turned OFF 100% or ON 100%.
>
>     We are in our summer(?!) at the moment and I was wondering about
>     turning off the tap in the hose from the block that leads into the
>     cabin for the heater.
>
>     Would the heater box and/or its valve semi-dry out and fill with a
>     mess of rusty crud?
>
>     Would the engine run hotter as there was a little less water
>     running through the system?
>
>     Or would I find myself basking in cool luxury as I tootle off to
>     the local boozer?
>
>     Or, most likely, none of the above, especially the last one?!
>
>     I did take the car on quite a long trip the other day (Le Mans
>     Classic!!) and, once the heat had soaked through the insulation,
>     we were quite warm….
>
>     The more I think about this, the less I like the idea of turning
>     that tap off…..
>
>     The tap does work, before you all shout at once!
>
>     Simon
>
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