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1989 Jeep Cherokee overheating

Tiny
DRAGONFYRE
  • MEMBER
  • 1989 JEEP CHEROKEE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 176,000 MILES
I have a '89 Jeep Cherokee Larado. It over heats at lower RPM's. I have changed the thermostat, the fan clutch, the auxiliary fan and the radiator. I still overheats at low RPM's. If I increase the RPM's to around 3000, the engine will cool. I get percolation out of the coolant reserve bottle. I need help!
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Sunday, June 8th, 2008 AT 12:31 PM

1 Reply

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Could be a sign that the water pump is getting old and weak and not being able to supply enough coolant circulation at low temps.

Also could be a error with fuel mixture or ignition timing.
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Sunday, June 8th, 2008 AT 1:20 PM

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