Sounds like lots of air in the system somewhere causing expansion and contraction. Usually in the heater core. Drop the end of the overflow tube into a gallon milk jug and the cycle the engine hot to cold 3-4 times. You should get less in the bottle each time if you are getting the air out.
1950 Ford F2 w/flathead V8/4-speed
2013 Jeep Grand Cherokee Overland Summit