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- From: c.oneill@trl.oz.au (Chris O'Neill)
- Subject: Re: Keeping Your Watercooled VW cool.
- Message-ID: <1992Nov18.034355.16942@trl.oz.au>
- Sender: root@trl.oz.au (System PRIVILEGED Account)
- Organization: Telecom Australia Research Laboratories
- References: <1992Nov14.213324.1738@wuecl.wustl.edu> <1e4a23INNkjr@fido.asd.sgi.com> <1992Nov16.234700.5188@trl.oz.au> <1992Nov17.000650.8471@wuecl.wustl.edu>
- Date: Wed, 18 Nov 1992 03:43:55 GMT
- Lines: 31
-
- In article <1992Nov17.000650.8471@wuecl.wustl.edu> christos@wucs1.wustl.edu
- (Christos Papadopoulos) writes:
- >In article <1992Nov16.234700.5188@trl.oz.au> c.oneill@trl.oz.au (Chris
- O'Neill) writes:
- >>A more general question: why is there such a range of thermostat opening
- >>temperatures between different cars? Obviously, the designers of cars with
- low
- >>thermostat temperatures thought there was something more important than
- >>maximizing engine efficiency.
- >
- > The thermostat opening temperature is not the only factor determining
- the engine
- >operating temp. The placement of the thermostat is crucial too. A thermostat
- placed
- >at the coolant inlet to the engine (near the water-pump) will see lower
- coolant
- >temperature than one placed at the coolant oulet (in the upper radiator hose).
- >Assuming that both thermostats are rated for the same temperature, thermostat
- A
- >will keep the engine at a higher temperature than thermostat B, because it
- will
- >not open as much for a given engine temp.
- > If you agree with the above logic, then this explains the difference
- in
- >thermostat temp ratings in different cars.
-
- It would if thermostat temp rating depended on just the location of the
- thermostat. But most cars have the thermostat near the outlet and with these
- the thermostat temp rating varies from car to car.
-
- Chris O'Neill
-