5.8 swap or not to swap, that is the ???? March 26, 2017, 12:12:17 AM So my black birds little 2.3 is starting to give me fits. First, it's starting to puff a little at first start up, not to concerned about that though. The main issue though is its losing coolant. It has a new heater core, no coolant in passenger compartment, No leaks at any of the houses anywhere, No leaks at water pump,No water in the oil or oil in the water,It does have some medium sized bubbles in the coolant at start up and when it's at operating temp, the coolant turns cloudy from tiny tiny bubbles. It seems to be getting aerated.My thoughts are that I have currently have a small head gasket leak. I haven't done a compression check yet. I pulled the plugs and they showed no signs of burning anything other than fuel.Thoughts anyone ??