Subject: [Healeys] Heater query

From: Simon Lachlan via Healeys <[email-masked]>
Date: Mon, 10 Jul 2023 15:26:20 +0100

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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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link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal>I have a MkII BT7 with a normal Smith&#8217;s heater. =
Normal insofar as it never seems to be turned OFF 100% or ON =
100%.<o:p></o:p></p><p class=3DMsoNormal>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.<o:p></o:p></p><p =
class=3DMsoNormal>Would the heater box and/or its valve semi-dry out and =
fill with a mess of rusty crud?<o:p></o:p></p><p class=3DMsoNormal>Would =
the engine run hotter as there was a little less water running through =
the system?<o:p></o:p></p><p class=3DMsoNormal>Or would I find myself =
basking in cool luxury as I tootle off to the local =
boozer?<o:p></o:p></p><p class=3DMsoNormal>Or, most likely, none of the =
above, especially the last one?!<o:p></o:p></p><p class=3DMsoNormal>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&#8230;.<o:p></o:p></p><p class=3DMsoNormal>The more I think about =
this, the less I like the idea of turning that tap =
off&#8230;..<o:p></o:p></p><p class=3DMsoNormal>The tap does work, =
before you all shout at once!<o:p></o:p></p><p =
class=3DMsoNormal>Simon<o:p></o:p></p></div></body></html>
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From: Bob Spidell <[email-masked]>
Date: Mon, 10 Jul 2023 13:07:00 -0700

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr">Ah!=
 My life is complete =F0=9F=98=9D</div><div dir=3D"ltr"><br></div><div dir=3D=
"ltr">I remember jamming something in there; might have been metric.</div><d=
iv dir=3D"ltr"><br><blockquote type=3D"cite">On Jul 10, 2023, at 12:43 PM, M=
ichael Salter &lt;[email-masked]&gt; wrote:<br><br></blockquote></d=
iv><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"auto">Act=
ually Bob, as an aside, the thread on the handle is actually 12- 32 ... the o=
nly 12 - 32 thread on a Healey as far as I'm&nbsp; aware.<div dir=3D"auto">I=
 know you absolutely couldn't continue with life as is without that incredib=
ly important nugget of information. =F0=9F=A4=A3=F0=9F=A4=A3=F0=9F=A4=A3</di=
v><div dir=3D"auto"><br></div><div dir=3D"auto">M</div><div dir=3D"auto"><br=
></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_=
attr">On Mon., Jul. 10, 2023, 3:03 p.m. Bob Spidell, &lt;<a href=3D"mailto:b=
[email-masked]">[email-masked]</a>&gt; wrote:<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex">
 =20
   =20
 =20
  <div>
    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.<br>
    <br>
    Both valves on the 100s are large and robust, though still can get
    stuck due to corrosion.<br>
    <br>
    <br>
    <div>On 7/10/2023 8:32 AM, Michael Salter
      wrote:<br>
    </div>
    <blockquote type=3D"cite">
     =20
      <div dir=3D"auto">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.&nbsp;
        <div dir=3D"auto">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.</div>
        <div dir=3D"auto"><br>
        </div>
        <div dir=3D"auto">M</div>
      </div>
      <br>
      <div class=3D"gmail_quote">
        <div dir=3D"ltr" class=3D"gmail_attr">On Mon., Jul. 10, 2023, 10:41
          a.m. Simon Lachlan via Healeys, &lt;<a href=3D"mailto:healeys@auto=
x.team.net" target=3D"_blank" rel=3D"noreferrer">[email-masked]</a>&=
gt;
          wrote:<br>
        </div>
        <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-=
left:1px #ccc solid;padding-left:1ex">
          <div link=3D"#0563C1" vlink=3D"#954F72" lang=3D"EN-GB">
            <div>
              <p class=3D"MsoNormal">I have a MkII BT7 with a normal
                Smith=E2=80=99s heater. Normal insofar as it never seems to b=
e
                turned OFF 100% or ON 100%.</p>
              <p class=3D"MsoNormal">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.</p>
              <p class=3D"MsoNormal">Would the heater box and/or its valve
                semi-dry out and fill with a mess of rusty crud?</p>
              <p class=3D"MsoNormal">Would the engine run hotter as there
                was a little less water running through the system?</p>
              <p class=3D"MsoNormal">Or would I find myself basking in
                cool luxury as I tootle off to the local boozer?</p>
              <p class=3D"MsoNormal">Or, most likely, none of the above,
                especially the last one?!</p>
              <p class=3D"MsoNormal">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=E2=80=A6.</p>
              <p class=3D"MsoNormal">The more I think about this, the less
                I like the idea of turning that tap off=E2=80=A6..</p>
              <p class=3D"MsoNormal">The tap does work, before you all
                shout at once!</p>
              <p class=3D"MsoNormal">Simon</p>
            </div>
          </div>
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