On the 2.3 HSC motor, the thermostat is located at the "back" of the
cylinder head - above the bellhousing. (Right where the rad hose attaches).
A word of caution... just below the thermostat housing is a rather large
opening where the timing marks are viewed. More than one DIYer (and I
imagine tech, alike) has gotten a little clumsy and dropped one or more
thermostat housing bolts into the opening... Unless someone is very lucky,
the only way to get them out is to separate the motor and trans...
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