Engine coolant flows continuously from the lower radiator hose to and through the heater core causing the unit to heat.
98 blazer heater core flush.
The heater core in your 1998 chevy s10 blazer is radiator style unit used to heat the interior cabin of your truck.
Part two shows what.
This is part one i also removed the entire dash to see what the big fuss was all about.
An attached fan forces heated air through the heater core fins and into the cabin when the heater is on.
To flush a heater core locate the heater core on the vehicle s firewall loosen the clamps and disconnect the heater hoses.
Replaced my heater core in my 1998 chevy blazer.