Date: Mon, 10 Oct 2011 23:13:01 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: Thermostats - 87 degree vs. 80 degree
Content-Type: text/plain; charset="US-ASCII"
The latest revision proper Vanagon thermostat should no flow to the radiator
until it opens. It was found to be so important considering the excessively
massive radiator capacity for winter operation that the proper t-stat even
has a rubber seal on the upper moving disc. When closed there is an open
bypass to keep the coolant circulating through the engine so coolant always
flows around the cylinder and heads. The t-stat acts as a mixing valve
between full open and closed.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Karl Wolz
Sent: Monday, October 10, 2011 7:15 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Thermostats - 87 degree vs 80 degree
If I'm not mistaken (I am a lot) there's always some flow, even at lower
temps.
Karl Wolz
|-----Original Message-----
|From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]
|On Behalf Of mark drillock
|Sent: Monday, October 10, 2011 4:03 PM
|To: vanagon@GERRY.VANAGON.COM
|Subject: Re: Thermostats - 87 degree vs 80 degree
|
|I too would only run the 87 degree one but you have the thermostat
|operation a little wrong. It is not an on/off switch for coolant flow.
|It merely begins to open at the specified temp and opens wider and
|wider as it gets hotter. Bentley page 19.11 has the operating range
|given. Not fully open until 105 C degrees.
|
|Mark
|
|
|Dave Mcneely wrote:
|>
|>
|> What the thermostat does physically is remain closed (no
|coolant flow) when the temperature is cooler than the set temperature,
|80 or 87 C. At the set temperature, it opens, allowing coolant flow.
|It plays no role whatsoever in getting the coolant temperature to drop.
|It will stay closed until the set temperature is reached, open, and
|remain open unless the temperature drops below the set temperature.
|With the engine running in summer that is unlikely. If the engine is
|overheating in summer (temperature running above 87 C), the thermostat
|might be stuck closed (not likely), but an 80 C thermostat will not
|make it run cooler if other causes are at fault (most likely). Check
|the fan, the radiator, and so on.
|>
|> Given that the engine is engineered for 87 C, it should run
|at that temperature.
|>
|> mcneely
|>
|-----
|No virus found in this message.
|Checked by AVG - www.avg.com
|Version: 2012.0.1831 / Virus Database: 2090/4543 - Release
|Date: 10/07/11
| 
