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Posted 21 May 2005 - 10:13 PM
Posted 21 May 2005 - 10:26 PM
if you want to test it, pull it out (with the engine cold!). with the engine cold the t-stat should be closed, so all you have to do to test it is look at it. if it's open at all then it is not working properly as it should be closed at room temperature. the tstat remains closed until the engine warms to whatever temperature the t-stat is rated for, then the t-stat opens to cool the motor. if it's constantly open (or you don't have a tstat at all) then the coolant keeps flowing and the engine never really gets hot, neither does the coolant, neither does the heat and neither do you. so if you take it out and it's open, it's causing your no heat problem. you can also plop it in a pot of water on the stove and heat it up to see if it opens all the way up at it's rated temp. but if yours is stuck open then you don't need to do that.
if the t-stat appears fine then youll want to pull both heater core hoses and run a garden hose through one side to blow out any trash accumulated in the lines to/through the heater core.
Posted 21 May 2005 - 10:57 PM
How much should the thermostat open while sitting in boiling water?
I presume more than about 1/8" of an inch? That's as far as my two new OEM subaru ones opened.
Posted 21 May 2005 - 11:04 PM
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