Heater core flush without garden hose?

Bru

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Looking for alternative ways to flush the heater core on an 01 Jeep Cherokee without a garden hose. Blend doors are working, thermostat is new and water temp is good but the heater core is cold, hoses are hot.
 

Bru

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Agreed. It's my brother-in-law's car and he recently changed the thermostat and added coolant. Once I get under the hood I'll re-bleed the system. He says both heater core hoses are hot, which doesn't make the most sense because one should be colder if the core is clogged, right? I'll get my infrared thermometer out there and check the temps of the hoses.
 

EmersonHart13

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I got one of those out by running it on a hill, nose high, so the heater core is lower in the system.
 

Bru

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Sweet. Will give that a shot first.
 

GoldPanther

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are you super sure that the actuator is fully functioning? There has been cases where people improperly install the thermostats facing the wrong way, this will cause slightly overheating and no heat inside. Now, I don't know how this thermostat looks so I don't know if it fits both ways.
 

Bru

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A hole was cut in the heater box to verify the blend door and actuator's operation. While inside, the heater core was cold even though the car was warmed up. The underhood hoses are all warm and the temp gauge reads normal operating temperature but I'm gonna get a temp reading from under the hood. I guess one of the core hoses was slightly cooler than the other. The car can get an occasional burst of heat but it's mostly cold.
 

GoldPanther

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You really have to check or bleed the antifreeze sys. If this didn't happen before he replaced the thermostat then more likely there's a lot of air in there.
 

Bru

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That's the plan :bigthumb: And will also probably clear out the heater core anyway just because it's a common problem.
 

Bru

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Clogged heater core was the issue. Got heat! Good, because when they get a new car in spring I'm calling dibs on this rig.
 

Bru

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