Why is your 1989 jeep Cherokee dying after it gets hot does not show temperature overheating but antifreeze boils out of reservoir?

Answer 1

I had an 89, great vehicle 289,000k. Some one stole it, and destroyed it. Some things that will help:

• replace the thermostat, and make sure that the copper plug is on the inside of the engine
• check for sheet metal or foil type insulation pads near the exhaust manifold. Check to see if something down there is getting burned or heated up and try to block the heat
• look on each side of the radiator fins to see if they are all clear and you have air flow. I kept having over heating problems with my Jeep, and not until I removed the radiator to replace it did I discover that a portion of the radiator that was hidden by the shroud and fan was completely covered in thick dry mud. No air flow.
• as far as your temp gauge not showing an over heating condition, does it work at all? It should show some increase in temp regardless. If you need to replace your temp sensor, it is a plastic plug with two wires coming out of it located on the intake manifold. It senses the water temp and sends it to the dash.
• new radiator cap.
• does the fan turn on? You can test it with a battery, if the fan works might be the fan temp sensor.
• do you have the right amount of good oil in the engine?
• water pump bad? Look at the water pump and if you are leaking water out of the weep hole on the bottom, your water pump bearings are bad and you need to replace the water pump. If you have a leak on the out side of the pump from a leaking gasket you might be sucking in air and not moving the coolant.

Hope this helps.

Anthony