Quick overview. In order, these are the issues and parts that have been replaced on my wife's Cruze 1.4T. Valve cover do to vacuum leak/torn diaphragm. Oil cooler, mixed oil and coolant throughout. Needed to replace thermostat, coolant reservoir, water outlet, both coolant temperature sensors, and most recently the water pump (not circulating enough coolant. Engine would hear up with AC on and coolant would boil in reservoir). Right after replacing water pump car was cooling very well. Radiator fan ran noticably less, then disaster. White smoke out of tailpipe that quickly got worse. Shut off car. Immediate first thought was head gasket. Took the plugs out, all 4 cylinders are moist, 2 middle ones still had coolant. Took off valve cover, maybe a little milky on the cam near the belt, above the water pump. Removed the intake manifold, coolant inside and pooled in 3rd cylinder head. Coolant dripped from throttle body hose when removed. Any ideas? I'm stumped at this point.