Recent content by xtultegra

  1. xtultegra

    Help with overheating 4.0

    I ran it with the radiator cap off and added coolant until it overflowed. Then I took the thermostat put and did the same thing. No dice. I did not jack the front end up. So I will try that next.
  2. xtultegra

    Help with overheating 4.0

    Fresh 4.0 build. Will run all day in stop and go traffic or idling up some knarly trail in 110 degree weather and never go over 195. Pull a hill on the highway or travel down the highway at 3000 rpm and it will over heat in about 5 minutes. Temp comes down if I slow down. What I have done: new...