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As a related question, what is the direction of flow through the radiator -
up from the bottom or down from the top?
Elton
BJ7
On Tue, Mar 29, 2022 at 11:44 AM Michael Salter <michaelsalter@gmail.com>
wrote:
> As Gary points out, and far as I have been able to figure out, the bypass
> passage is open when the engine is cold, the idea being that by "short
> circuiting" the radiator the coolant in the heater and bypass passage will
> warm up more quickly and the heater will produce heat more quickly.
> We had a slew of the "shrouded " type thermostats that I bought when
> Smiths Canada closed down. The part number was 43570/28 and we used to sell
> them to customers who reported overheating problems.
> I stopped promoting them as a potential solution to overheating issues
> after being taken to task by a customer who did an extensive study of the
> issue and proved, at least to my satisfaction, that they improved cooling
> not one iota.
>
> M
>
> On Tue., Mar. 29, 2022, 10:47 a.m. Alan Seigrist, <healey.nut@gmail.com>
> wrote:
>
>> I don't know if this has ever been answered before, but where does the
>> little bypass port begin?
>>
>> What parts of the head does that bypass come in contact with?
>>
>> When do you want to cover the port with a sleeve (when coolant is hot or
>> cold?)
>>
>> I ask because the old bellows style thermostat will cover the bypass port
>> when the thermostat opens
>>
>> then I have another wax thermostat and the sleeve actually cover the
>> bypass when it is cold, and doesn't cover it when the thermostat opens....
>> so it works exact opposite to the old bellows style thermostat.
>>
>> confused....
>>
>> Cheers,
>>
>> Alan
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Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr">As a related question, what is the direction of flow throu=
gh the radiator - up from the bottom or down from the top?<div>Elton=C2=A0=
=C2=A0</div><div>BJ7</div></div><br><div class=3D"gmail_quote"><div dir=3D"=
ltr" class=3D"gmail_attr">On Tue, Mar 29, 2022 at 11:44 AM Michael Salter &=
lt;<a href=3D"mailto:michaelsalter@gmail.com";>michaelsalter@gmail.com</a>&g=
t; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0p=
x 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div d=
ir=3D"auto">As Gary points out, and far as I have been able to figure out, =
the bypass passage is open when the engine is cold, the idea being that by =
"short circuiting" the radiator the coolant in the heater and byp=
ass passage will warm up more quickly and the heater will produce heat more=
quickly.=C2=A0<div dir=3D"auto">We had a slew of the "shrouded "=
type thermostats that I bought when Smiths Canada closed down. The part nu=
mber was 43570/28 and we used to sell them to customers who reported overhe=
ating problems.=C2=A0</div><div dir=3D"auto">I stopped promoting them as a =
potential solution to overheating issues after being taken to task by a cus=
tomer who did an extensive study of the issue and proved, at least to my sa=
tisfaction,=C2=A0 that they improved cooling not one iota.</div><div dir=3D=
"auto"><br></div><div dir=3D"auto">M</div></div><br><div class=3D"gmail_quo=
te"><div dir=3D"ltr" class=3D"gmail_attr">On Tue., Mar. 29, 2022, 10:47 a.m=
. Alan Seigrist, <<a href=3D"mailto:healey.nut@gmail.com"; rel=3D"norefer=
rer" target=3D"_blank">healey.nut@gmail.com</a>> wrote:<br></div><blockq=
uote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1p=
x solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">I don't kno=
w if this has ever been answered before, but where does the little bypass p=
ort begin?=C2=A0 =C2=A0<div><br></div><div>What parts of the head does that=
bypass come in contact with?=C2=A0<br><br>When do you want to cover the po=
rt with a sleeve (when coolant is hot or cold?)</div><div><br></div><div>I =
ask because the old bellows style thermostat will cover the bypass port whe=
n the thermostat opens<br><br>then I have another wax thermostat and the sl=
eeve actually cover the bypass when it is cold, and doesn't cover it wh=
en the thermostat opens.... so it works exact opposite to the old bellows s=
tyle thermostat.</div><div><br></div><div>confused....<br><br>Cheers,</div>=
<div><br></div><div>Alan</div></div>
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