Focus Fanatics - View Single Post - Thermostat housing, How-to, but need detail.
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Old 11-14-2012, 03:36 PM   #19
Xin Ansin
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Join Date: Nov 2012
Fan#: 105987
Location: Victorville, CA
What I Drive: 2002 Silver ZTS

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I watched a video on replacing the thermostat housing, the guy vacuumed all the air out of the coolant system as he refilled the coolant. is it strictly necessary to do so? or can I just fill it up and let the system to it on it's own?
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