98 Blazer Heater Core Flush

Replaced my heater core in my 1998 chevy blazer. Engine coolant flows continuously from the lower radiator hose to and through the heater core causing the unit to heat. The heater core in your 1998 chevy s10 blazer is radiator style unit used to heat the interior cabin of your truck.

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To flush a heater core locate the heater core on the vehicle s firewall loosen the clamps and disconnect the heater hoses.

98 blazer heater core flush.

Part two shows what. Next insert an airline into the outlet hose and seal the line with duct tape. An attached fan forces heated air through the heater core fins and into the cabin when the heater is on. Hi the heater hoses can be disconnected at the fire wall if you want to you can plug off the hoses that go to the heater core do this when the engine has not been run and is cold attach a water hose or hold the hose to one of the heater tubes at the fire wall and turn the water and let it flush for 10 minutes or so then do it on the opposite heater tube.

This is part one i also removed the entire dash to see what the big fuss was all about. Place a container under the vehicle turn on the air compressor and allow the coolant and grime to drain into the container.