Peugeot Re: 87 deg C thermostat in TD

From: Joseph Ashment (wyofisher@earthlink.net)
Date: Fri 01 Nov 2002 - 02:12:45 EST

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    I don't know that my temp sender and gauge are accurate. I do see the
    difference on the temp gauge with the different thermostats, and I know that
    my fans aren't always on. I never really worried about the gauge enough to
    make a temp chart. Not a bad idea though.

    Joe

    ----- Original Message -----
    From: <firepiston@juno.com>
    To: <wyofisher@earthlink.net>
    Cc: <peugeots@vtlink.net>; <peugeot-L@yahoogroups.com>
    Sent: Wednesday, October 30, 2002 8:52 PM
    Subject: Re: 87 deg C thermostat in TD

    > Joe,
    > How do you know your temp gauge and temp sender is accurate. The only
    > way to know is to calibrate the sender and temp gauge using known
    > references.
    > I did that on my 82 604 TD. Took the sender out and put in boiling water,
    > measured water temp and corresponding resistance of sender as the water
    > cooled and a table was generated. Re-installed sender and had SPDT
    > switch to switch sender to the temp gauge or the DVM, where resistance
    > was measured and the temp looked up in the table.
    > Steve
    >
    > On Wed, 30 Oct 2002 20:31:52 -0800 "Joseph Ashment"
    > <wyofisher@earthlink.net> writes:
    > > You're right, I do go for a lower baseline. My particular car has
    > > always
    > > been very heat sensative. In the summer, if I start out with a 72
    > > degree
    > > thermostat my car runs with the temp in the middle of the guage,
    > > just warm
    > > of middle with the A/C on. With an 80 degree, the car just heats up
    > > and
    > > turns on the fans. I helped the situation greatly with a recore job
    > > on my
    > > radiator with a more eficiant core than the factory. I just have to
    > > adjust
    > > for the design flaw of Peugeot's with the barely adequate cooling
    > > system.
    > > So I only run the warm 80 degree in the winter. I am continually
    > > surprised
    > > at how some of our list members can drive their diesels so hard and
    > > hot and
    > > not crack the heads and overheat the engines.
    > > Joe
    > >
    > >
    > >
    > > > The thermostat has nothing to do with overheating once it is open.
    > > It
    > > > simply keeps the coolant temperature from falling below the
    > > thermostat
    > > > temperature. If your car overheats with an 87 degree thermostat
    > > it would
    > > > also overheat with a 75 degree thermostat, except for the
    > > exceptional
    > > > circumstance of a temporary overload of the system, such as
    > > climbing a
    > > > short steep hill, where starting the climb with a lower baseline
    > > > temperature would allow you a little more time under overload to
    > > reach the
    > > > top of the hill without overheating.
    > > >
    > > > Regardless of the thermostat temperature, or even with no
    > > thermostat,
    > > > overloading the cooling system will cause overheating. The
    > > thermostat has
    > > > nothing to do with it. But it does hasten warmup, and prevent
    > > overcooling
    > > > and subsequent loss of efficiency, power, and mileage, and
    > > sludging of the
    > > oil.
    > > >
    > >
    > >
    > >
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