Re: [Chrysler300] 57 heater control valve

[E R Mills AT <millserat@xxxxxxxxxxxxx>]

hey guys are we really talking about a Bourdon tube - they are typically 
used for measuring PRESSURE not Temperature. If you look the term up, 
typically they are circular tubes closed at one end that change arc of 
curvature as pressure causes deflection of tube. The little mercury 
filled tubes on house thermostats are mercury switches based on thermal 
expansion of mercury and gravity to tilt a switch about a pivot.

Lindsey Fuller wrote:
>
> Thks for that explanation, but if the car has only off, lo, hi, 
> buttons and no actual temperature settings like newer cars, why is it 
> there?
>
> ----- Original Message -----
> From: Bob Jasinski <rpjasin@xxxxxxxxxxx <mailto:rpjasin%40pacbell.net>>
> Date: Monday, January 19, 2009 12:39 pm
> Subject: RE: [Chrysler300] 57 heater control valve
> To: 'Terry & Andree Hoeman' <tehoema@xxxxxxxxxxxxxx 
> <mailto:tehoema%40megavision.com>>, 'Lindsey Fuller' <yesdnil@xxxxxxx 
> <mailto:yesdnil%40shaw.ca>>
> Cc: 'Chrysler300 list' <Chrysler300@xxxxxxxxxxxxxxx 
> <mailto:Chrysler300%40yahoogroups.com>>
>
> > I don't think mercury was in the tube as I've seen the tube
> > break off at the
> > bellows and nothing came out.
> >
> > Bob
> >
> > -----Original Message-----
> > From: Terry & Andree Hoeman [mailto:tehoema@xxxxxxxxxxxxxx 
> <mailto:tehoema%40megavision.com>]
> > Sent: Monday, January 19, 2009 10:27 AM
> > To: 'Lindsey Fuller'; Bob Jasinski
> > Cc: 'Chrysler300 list'
> > Subject: Re: [Chrysler300] 57 heater control valve
> >
> > Great description but think Mercury inside the tube.  Need
> > something pretty
> > dense to be able to move the valve around.
> >
> > They really do make a difference but lets face it ---how much
> > will you drive
> > it while using the heater??
> >
> > I still opt for the 10$ NAPA repair kit/replacement rubber
> > seal.  Little
> > work and can't be done much more than once I expect since the
> > tabs will soon
> > break but worth the try.
> >
> >
> > ----- Original Message -----
> > From: "Bob Jasinski" <rpjasin@xxxxxxxxxxx 
> <mailto:rpjasin%40pacbell.net>>
> > To: "'Lindsey Fuller'" <yesdnil@xxxxxxx <mailto:yesdnil%40shaw.ca>>
> > Cc: "'Chrysler300 list'" <Chrysler300@xxxxxxxxxxxxxxx 
> <mailto:Chrysler300%40yahoogroups.com>>
> > Sent: Monday, January 19, 2009 12:11 PM
> > Subject: RE: [Chrysler300] 57 heater control valve
> >
> >
> > > Lindsey,
> > >
> > > The bourdon tube is a sealed tube about 1/8" thick and is
> > installed in the
> > > air stream path.  It is filled with a gas (probably air
> > I'm not sure) that
> > > applies pressure to a bellows that opens and closes the heater
> > control
> > > valve
> > > like a thermostat in your home.  It is designed to
> > maintain a constant
> > > temperature within the car's interior based on what the driver
> > sets it at.
> > > The heater control valve without the tube just maintains a
> > fixed amount of
> > > coolant flow through the heater core, it is not regulated
> > automatically,> only by the fixed setting via the temp control handle.
> > >
> > > Bob J
> > >
> > >
> > >  _____
> > >
> > > From: Chrysler300@xxxxxxxxxxxxxxx 
> <mailto:Chrysler300%40yahoogroups.com>
> > [mailto:Chrysler300@xxxxxxxxxxxxxxx 
> <mailto:Chrysler300%40yahoogroups.com>] On
> > > Behalf Of Lindsey Fuller
> > > Sent: Monday, January 19, 2009 6:34 AM
> > > To: Bob Jasinski
> > > Cc: 'Bill Leahy'; 'Chrysler300 list'
> > > Subject: Re: [Chrysler300] 57 heater control valve
> > >
> > >
> > >
> > > Is the boudon tube necessary & what does it do?
> > >
> > > Bob Jasinski wrote:
> > >
> > >>Bill,
> > >>
> > >>There are kits available that include the rubber diaphragm
> > that allow you
> > > to
> > >>rebuild the valve. The valve is disassembled by bending the
> > little tabs
> > >>that hold it together, and basically you clean everything up,
> > put in the
> > > new
> > >>diaphragm and reassemble. There are companies that will do
> > this for you
> > >>also, and that may be a simpler way to go.
> > >>
> > >>New valves are also available, (check NAPA) there are some
> > issues with the
> > >>new valves however. The issues are that they are steel, not
> > brass, and
> > >>they
> > >>do not include the temperature sensing bourdon tube the
> > originals came
> > > with.
> > >>I would rebuild the original if it were my car, as I have had
> > both and
> > >>prefer the original. Others may have a source for the kit
> > and/or
> > >>rebuilders
> > >>but you might try looking in Hemmings or Google search. My car
> > is a 300G
> > >>so
> > >>I can't say for sure the '57s had the bourdon tube, but I'll
> > bet they did.
> > >>
> > >>Bob J
> > >> _____
> > >>
> > >>From: Chrysler300@ <mailto:Chrysler300%40yahoogroups.com>
> > yahoogroups.com> [mailto:Chrysler300@
> > <mailto:Chrysler300%40yahoogroups.com>
> > > yahoogroups.com]
> > > On
> > >>Behalf Of Bill Leahy
> > >>Sent: Thursday, January 15, 2009 3:11 PM
> > >>To: Chrysler300 list
> > >>Subject: [Chrysler300] 57 heater control valve
> > >>
> > >>
> > >>
> > >>one of the many things to improve or still fix in the first
> > place is my
> > >>heater control valve / it leaks badly.
> > >>
> > >>so, i finally have it out of the car and it looks like trouble
> > trouble>>trouble / rusty and carroded.
> > >>
> > >>are they fixable or do ya replace them suckers?
> > >>
> > >>or do ya block them off and close one eye?
> > >>
> > >>billllllllll in not so sunny kennewick washington
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>[Non-text portions of this message have been removed]
> > >>
> > >>
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>  

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