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Cooling problem with Jeep Cherokee
On Tue, 25 Jan 2005 10:37:14 -0500, Ed > wrote:
>Vehicle is a 2001 Cherokke, 4.0 >Problem: I start the vehicle and bring it up to operating temperature (gauge >reads between 190/210). Heat in vehicle works fine. >On two occasions I was driving along when a warning chime sounded and the "Check >Gauges" light came on (I had been driving for roughly a half hour...outside >temperature was in the 20's). I looked at the temperature gauge and it had shot >up all the way into the red zone (260). The first time it happened I pulled >over, shut the engine off, and checked under the hood. I didn't notice or feel >anything that would indicate the engine over heating... no excessive heat, >steam, odor, or "pinging". I restarted the vehicle and the gauge dropped back to >210. >A couple of days later, it happened again; only this time the "check gauges" >light turned off and the gauge dropped back to 210 before I had a chance to pull >over (fortunately this time it happened I was about 100' from my driveway). >Again, no observable symptoms of excessive overheating. >Once I was able to check things more closely, I noticed that the upper and lower >radiator hoses were warm to the touch, and there was no pressure and very little >coolant in it. The radiator and cap were just barely warm. >There's no sign of any fluid leaks or lost coolant. The level in the expansion >tank hasn't gone up or down. The electric fan has kicked in a couple of times, >but the gauge was still in the safe zone (about 230). >I replaced the thermostat (195), and it's still running the same way... engine >warms up, heat is fine, but radiator, upper and lower hoses are barely warm. >What could be the problem here? Weak water pump? Clogged or blocked hoses and/or >radiator? Thermostat in backwards? You really ought to get it fixed before you blow the engine. |
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