[Tech II]

Allow the car to get hot, and shut it down......when it has cooled enough, attach a coolant pressure tester for the night....

Next day, remove plugs, and disable spark(remove power harness to ICM, 2 wire connector on passenger side), and disconnect harness to injectors....now have someone crank the vehicle(it won't start)......I can almost guarantee you will see coolant come out of #1 cylinder(this cylinder is on the backside of engine, first cylinder on the passenger side).....

Many times, an overheated car is diagnosed as a lower intake problem on 3.4's....but if you don't do a simple check on the heads, you will end up doing the same job all over again to get to the heads.....usually poor diagnosis.....