1993 Chevy Blazer Thermostat help

1993 CHEVROLET BLAZER
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TYSTER403
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Engine Cooling problem
1993 Chevy Blazer 6 cyl Four Wheel Drive Automatic

I'm replacing my therostat because I thought it was stuck. Wasn't getting any heat from blower, temp wasn't registering on gauge, top radiator hose got hard once engine got warm/hot. Pulled out old thermo. Where does the new o-ring gasket go, behind themostat or in front of?
Dec 21, 2009 at 11:10 AM
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