Question about 2002 Chevrolet Blazer
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Posted on Jan 02, 2017
I'm not sure if you heater control valve is vaccuum operated or if it cable operated. If it is vaccuum operated the valve could be bad or you have a vaccuum leak to the valve. If your valve is cable operated then you most likely have a clogged heater core. Please rate my answer.
Posted on Dec 09, 2009
Is it possible the replacement engine has a water pump that turns the opposite direction from the original ?
The thermostat has to be open to allow flow thru the radiator, have you tried running without a thermostat to check flow ?
Posted on Jul 25, 2012
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