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- Newsgroups: rec.autos.vw
- Path: sparky!uunet!gumby!wupost!eclnews!wucs1!christos
- From: christos@wucs1.wustl.edu (Christos Papadopoulos)
- Subject: Re: Keeping Your Watercooled VW cool.
- Message-ID: <1992Nov17.000650.8471@wuecl.wustl.edu>
- Sender: usenet@wuecl.wustl.edu (News Administrator)
- Nntp-Posting-Host: wucs1
- Organization: Washington University, St. Louis MO
- References: <1992Nov14.213324.1738@wuecl.wustl.edu> <1e4a23INNkjr@fido.asd.sgi.com> <1992Nov16.234700.5188@trl.oz.au>
- Date: Tue, 17 Nov 1992 00:06:50 GMT
- Lines: 20
-
- 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.
- >
- >Chris O'Neill
- >Telecom Australia Research Labs
-
- 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.
-
- Christos.
-