[Kurt in NJ]

One way without much in tools is to take off the belt and top hose fill cooling system up to within 1/4 inch of top, crank engine with ignition off and look for bubbles ---if you get bubbles --it may just raise the coolant level at first, there is a combustion chamber to coolant leak most likely you can also start the engine and see if bubbles come in the first 30 seconds or so (after a min or 2 heat may start micro boiling bubbles)