From: The Raven on
"Neil Fisher" <neil(a)> wrote in message
> On Sun, 09 May 2010 11:54:28 +1000, D Walford
> <dwalford(a)>, after considering some belly-button fluf,
> wrote:
>>LOL, not too many women have a clue about cars.
>>Before we could afford decent cars my wife was taught to keep an eye on
>>gauges and warning lights and about the dire consequences of ignoring
>>them but after driving near new cars for the last 10yrs I suspect her
>>training has worn off, the new Forester doesn't even have a temp gauge,
>>it has a blue light which is on when the engine is cold, no light when
>>the temp is normal or a red light if its too hot.
> Checked the Focus when we had it, and the temp gauge is somewhat
> non-linear - it read rock-steady at half way on the gauge from about
> 75 all the way to 100 or so of water temp at the "radiator cap" (which
> is actually at the over-flow bottle). I wonder how closely that
> resembles the actual coolant temp at the thermostat, and if the answer
> is "closely", then I also wonder how many cars are made the same way -
> which appears to be that the gauge is really only the same as a light
> anyway.

Most guages are non-linear. In some cases the guage only shows practical
temperature ranges (not warm enough to way too hot). I even noticed some
guages are clearly marked that to how accurate they are is another
story but, you generally need nothing more than a general indication.

From: Brad on

"D Walford" <dwalford(a)> wrote in message
: On 9/05/2010 6:58 PM, Doug Jewell wrote:
: > Actually, I think waterpumps should be electric instead of driven by the
: > fanbelt. This could have numerous benefits - speed could be set
: > optimally, no risk of cavitation at high engine revs, or insufficient
: > pumping on an idling but hot engine. Could also have the pump continue
: > on for a minute or two after power-off, to eliminate the hot-spots that
: > occur, especially if the engine is turned off just after running hard.
: > Could also do away with the other common fail-point, the thermostat too.
: > It could run at a low speed on a cold engine - just sufficient to keep a
: > small amount of water moving, and then as the engine heats up, the flow
: > rate could be increased.
: Available right now to suit your car, the ones I know of are made by
: Davies Craig.
: Daryl

I'm in negotiations to set up fleet management systems that will remotely
monitor all the vital signs of vehicles. Probably be deployed in the LNG
fields and the mining sector. The trucks will already have some systems in
place but we will look at putting in systems to cruisers and small trucks as
well. Looks like there'll even be an oil quality sensor so the vehicles are
neither over or under serviced. tricky gadgets really and the main problem
is sifting through the data. Number one concern is fuel mismanagement where
the local drivers siphon off fuel and sell it for grog money. Trucking
companies loose huge amounts to this trade a year. One company I know of
lost half a million dollars worth in months.

We'll be getting in some test systems for demo soon so that will be a real

Brad Leyden
6� 43.5816' S 146� 59.3097' E WGS84
To mail spam is really hot but please reply to thread so all may benefit (or
laugh at my mistakes)

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