heater core

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  #1  
Old 02-04-03, 10:47 AM
alliken14
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Question heater core

I have a 1989 jeep cherokee laredo 4.0. I have no heat, in which i did before i had the radiator replaced. i have replaced the thermostat, heater control valve. but still no heat. just blows cool air. i have been told i have to replace the heater core. i've never done it on this vehicle. how hard is it, and how do i replace it? i bought a new core, but i need to know how to do it....
 
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  #2  
Old 02-04-03, 12:07 PM
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i would imagine it would take a while and might suggest having a shop perform this job for you, you can check the link below for r&r procedure but it does not go into great detail.
http://www.cybrrpartspro.com/Manual%...delLookup.html
have you tried having the heater core flushed are you sure all the air is out of the cooling system, are both heater hoses warm to the touch?
 
  #3  
Old 02-04-03, 04:15 PM
alliken14
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HEATER CORE

i checked the hoses going to the heater core...no they are not hot. they are cold......what is your suggesttion?
 
  #4  
Old 02-04-03, 04:48 PM
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Join Date: Dec 2001
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if neither heater hose is warm with the engine up to temp it is either a circulation problem or air pocket in the system most likely on this model it is an airpocket you can probably install a flush fitting in the heater hose at the highest point and fill the system up through that fitting and bleed excessive air in the system through the fiiting.
 
  #5  
Old 02-06-03, 07:03 PM
Joe_F
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I agree with BeJay.
 
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