How to Flush a Heater Core
Locate the heater core on the vehicle's firewall.. Disconnect the heater hoses.. Point the inlet hose down toward the container.
Steps
1
Locate the heater core on the vehicle's firewall.
Locate the heater core on the vehicle's firewall.
2
Disconnect the heater hoses.
Disconnect the heater hoses.
3
Point the inlet hose down toward the container.
Point the inlet hose down toward the container.
4
Insert an airline or water hose into the outlet hose.
Insert an airline or water hose into the outlet hose.
5
Seal the line.
Seal the line.
6
Turn on the hose or air compressor.
Turn on the hose or air compressor.
7
Allow the coolant and grime to drain.
Allow the coolant and grime to drain.
8
Repeat the process with the water hose.
Repeat the process with the water hose.
9
Reconnect the inlet and outlet hoses.
Reconnect the inlet and outlet hoses.
10
Refill the coolant system.
Refill the coolant system.
11
Park the vehicle on level ground.
Park the vehicle on level ground.
12
Allow the engine to cool completely.
Allow the engine to cool completely.
13
Jack the vehicle up.
Jack the vehicle up.
14
Place a container beneath the vehicle to catch drained fluids.
Place a container beneath the vehicle to catch drained fluids.
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