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Old 02-27-2016, 08:00 AM
My Jeep: 2003 4.0L WJ
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Heater Inlet Hose

Where is the heater inlet hose on cherokee 4.0 2003. There are two hoses running from the firewall. There is an upper and lower. Not sure which one is the heater inlet hose.

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Old 02-27-2016, 08:10 AM
My Jeep: 2006 5.7L WK
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Re: Heater Inlet Hose

On my 04 WJ 4.0 the bottom heater core hose is the inlet to the heater from the thermostat housing and the top heater core hose is the outlet of the heater core to the water pump. I always check because they could easily be switched.

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