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Pete
Dodge Dakota
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3/27/2011
06:22:25
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 Subject: 180' thermostat ??
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Message:
what temp after 180' thermostat opens ? mine running at around 185' + or - a few degrees is this normal ? thx... just put in yesterday
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Rebuilt Dodge
Dodge Dakota
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3/29/2011
21:23:25
|  RE: 180' thermostat ??
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Message:
the thermostat is operated by the sprign heatin up and shrinking. it may not be perfect or exact. but it shoul dbe real close to what they say it is made for 180. there could also be fluctuations in the gauge you have giving the 185 reading. i would not worry about this at all. it is close enough. if it gets more of a variation of what it is suppose to open at then i would look at getting a new thermostat.
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pete
Dodge Dakota
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3/31/2011
08:48:44
| RE: 180' thermostat ??
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Message:
Thx..
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nope
Dodge Dakota
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3/31/2011
23:34:33
| RE: 180' thermostat ??
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Message:
"the thermostat is operated by the sprign heatin up
and shrinking"
Metal expands when it gets hot not shrink!
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Harmon
Dodge Dakota
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4/01/2011
23:38:38
| RE: 180' thermostat ??
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"the thermostat is operated by the sprign heatin up and shrinking."
Wrong.
The spring keeps pressure in the CLOSE direction. The little chamber that the shaft goes into (usually copper for its heat transfer abilities) has a wax pellet in it. As coolant temp rises, the wax pellet liquifies and expands, pushing the shaft out of the chamber and opening the valve. As coolant temp decreases the wax gets smaller, and the spring pushes the valve in the CLOSE direction.
Look on the side of the wax chamber and you will see 3 or 4 marks or depressions. Those are used to set the opening temperature during manufacture.
I have made 180* thermostats from 195* units by increasing the depth of those depressions.
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Pete
Dodge Dakota
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4/02/2011
11:59:08
| RE: 180' thermostat ??
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Message:
Nice info Harmon unfortnate I installed already and cannot
look at the marks it has but will remember next thermostat I
install and pass the info on to who might be interested .
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Harmon
Dodge Dakota
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4/02/2011
12:46:28
| RE: 180' thermostat ??
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Message:
No sweat, Pete.
Most thermostats are made pretty much the same way. Next time you see one in auto parts store or just lying about, take a real good look at it.
Here's an excellent video that shows how they're made and how they work.
http://www.youtube.com/watch?v=xVPtIi6sVYg
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Pete
Dodge Dakota
JOIN HERE
4/03/2011
07:08:57
| RE: 180' thermostat ??
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Message:
Cool video interesting that explains
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