Good Morning,
I started having issues with my 99 wj with the 4.0, and would like to get some ideas from everyone. I replaced the water pump and thermostat 2 years ago, and it has been fine. Sitting in line for the car wash yesterday, and I noticed it edging over the 210 mark, which it never does. It actually made its way to the red zone. I went home and replaced the thermostat and the temp. Sensor switch on the thermostat housing and still it is overheating. It is doing this while it is idling, and cools off as you are driving. There was no loss of anti freeze, as it was at the full level, and I checked the oil, and no water in the oil, so I don’t think it is a head a gasket issue. This leads me to think that maybe the radiator is no good...but the funny thing is that even when it hit the red zone, and I had popped the hood to let it cool, it never overflowed. I don’t know if there is something else I should look at, or what suggestions you all have. I flush the system every two years, so I don’t think it is a dirty system, but you never know. Are there any other sensors, or a fan relay?
Thanks,
Roger
I started having issues with my 99 wj with the 4.0, and would like to get some ideas from everyone. I replaced the water pump and thermostat 2 years ago, and it has been fine. Sitting in line for the car wash yesterday, and I noticed it edging over the 210 mark, which it never does. It actually made its way to the red zone. I went home and replaced the thermostat and the temp. Sensor switch on the thermostat housing and still it is overheating. It is doing this while it is idling, and cools off as you are driving. There was no loss of anti freeze, as it was at the full level, and I checked the oil, and no water in the oil, so I don’t think it is a head a gasket issue. This leads me to think that maybe the radiator is no good...but the funny thing is that even when it hit the red zone, and I had popped the hood to let it cool, it never overflowed. I don’t know if there is something else I should look at, or what suggestions you all have. I flush the system every two years, so I don’t think it is a dirty system, but you never know. Are there any other sensors, or a fan relay?
Thanks,
Roger