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11th May 2013, 16:08 | #271 |
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Interesting Jim !
Glad I kept all the old housings to have a fiddle with!
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[SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block |
11th May 2013, 16:10 | #272 | ||||
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Thanks for your observations. Is your old stat like the one in the photo above (barrel-ended piston) or the simple rod (later) type?
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Obviously any significant slop in the piston will increase 'opening' temperature.Was yours replaced because it opened too early? Quote:
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Are you able to extract and test the wax as shown earlier? Can you examine the capsule interior? If it's the earlier stat type, can you send me a sample? TC Last edited by T-Cut; 11th May 2013 at 16:12.. |
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11th May 2013, 19:07 | #273 | |
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Quote:
Steel can deform in an 'elastic' or 'plastic' way, where elastic deformation as seen in springs etc, the material returns to its original size / shape, whereas plastic deformation results in a permanent change in size / shape. All Steel creep is 'plastic' in nature, so just imagine the metal body of the thermostat slightly changing in shape over many years of thermal and mechanical cycling. Does that make sense? This would in theory change the opening temperature. Although I would say that reduction of spring rate through metal fatigue would be a more likely cause... I would imagine that the thermostats are designed to fail cooler or open, rather than hotter or closed, to minimise the risk of over heating. |
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11th May 2013, 19:28 | #274 | |
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It Doesn't Necessarily Need Movement
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(Not suggesting gravity affects our stats)
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Beyoncé's Green Light Used More Rubber 355188 of 355194 |
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11th May 2013, 20:38 | #275 | |
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Quote:
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12th May 2013, 11:25 | #276 | |
This is my second home
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Quote:
Wiki explains it: The observation that old windows are sometimes found to be thicker at the bottom than at the top is often offered as supporting evidence for the view that glass flows over a timescale of centuries. The assumption being that the glass was once uniform, but has flowed to its new shape, which is a property of liquid. However, this assumption is incorrect; once solidified, glass does not flow anymore. The reason for the observation is that in the past, when panes of glass were commonly made by glassblowers the technique used was to spin molten glass so as to create a round, mostly flat and even plate (the crown glass process, described above). This plate was then cut to fit a window. The pieces were not, however, absolutely flat; the edges of the disk became a different thickness as the glass spun. When installed in a window frame, the glass would be placed with the thicker side down both for the sake of stability and to prevent water accumulating in the lead cames at the bottom of the window. Occasionally such glass has been found thinner side down or thicker on either side of the window's edge, the result of carelessness during installation. TC |
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12th May 2013, 11:40 | #277 |
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Thanks TC
Destroyed - a belief I've held for 45 years. I'll never trust a Frenchman again.
Still at least I know that thunder is clouds banging their heads together. My parents told me that.
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Beyoncé's Green Light Used More Rubber 355188 of 355194 |
13th May 2013, 12:07 | #278 |
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13th May 2013, 15:01 | #279 |
This is my second home
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The complete thread should be read so we don't go around the old ground.
TC |
14th May 2013, 18:59 | #280 |
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Well I don't know if this helps, but I looked through the cars MOT history and in 2008 it was idling at 85 degrees on emissions test, in 2010 at 82 degrees and now it stays at 75-76 degrees (IPK 7.0) very consistently.
whether there is a error between these bits of info I don't know but it would seem my thermostat has gradually lost 10 degrees in the last 5 years.... |
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