Will, check there's no water in the oil via the dipstick - contaminated oil looks like mayonnaise.   Check fanbelt tension then leave the car idling in the driveway until at operating temperature. If it's escaping out the overflow, a new radiator cap is the go.   Check the hoses and hose clamps for leaks, radiator core back and front, welch plug in the back of the head and under the water pump.   Check the exhaust for any water or vapour discharge.   Sometimes a fine crack develops where