89 Cherokee heat question

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  #1  
Old 01-31-04, 08:07 PM
Hirsch's Avatar
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89 Cherokee heat question

Hello!!

My roomate has a '89 Jeep Cherokee Laredo with 4WD and a 6 cyl engine with auto trans. There is very little heat coming out of the vents. The thermostat was just replaced and the heater core isn't leaking. He bought it from his mechanic who has been fixing VW's for several years and she mentioned that it never had much heat. It isn't an everyday driver. Would flushing the coolant sytem help with this or is there some other procedure that isn't too extreme for getting heat?
 
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  #2  
Old 01-31-04, 08:23 PM
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We had a '92 with the same 4 liter engine, before that we had an 86 witht he 2.8 liter GM V6. Both of those heater would run you out of the car (in the front seat). However I do recall that the 92 had some "flapper" issue. The flapper would get hung up between heat and defost. IIRC the flapper on that one was vacuum operated but on the 86 it was cable.

BTW, when we bought the 92 it didn't get as hot because someone had replaced the thermostat with one that was the wrong temperature rating.

The reason for the above comment about the front seat had to do with the heater being designed for the cubic volume of the "car part" of the vehicle. Add in the extra cubic feet of the rear cargo and it didn't work quite as well. This was never a problem at home in Texas, but every time we took those cars to Cincinnati for Christmas or Colorado for skiiing they didn't seem nearly so warm.

Good luck.

Frank
 
  #3  
Old 02-01-04, 05:15 AM
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See if both heater hoses are hot if they are not try flushing the heater core it sometimes solves the problem and it's free and easy to try.
 
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Old 02-03-04, 01:46 PM
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Thank you very much for the advice. We will be sure to check these things out. Luckily, the Jeep is basically a bad weather vehicle so the '97 Jetta's body will not get disgusting due to the amount of salt and sand on the roads.
 
  #5  
Old 02-03-04, 06:11 PM
tstokka
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Are you getting alot of air movement?
 
  #6  
Old 02-03-04, 08:28 PM
pagerboy
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Heater core may be plugged?
 
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