I have a totally original 89 turbo voyager... heres whats been goin on recently...... Was running kinda warm sometimes- I put the fan on a toggle switch, seemed to go away. Then temp climbed very fast once- installed 180 thermostat with 1/16 hole. Then would get hot while idling, but would slowly cool off while driving, also noticed coolant seeping from stat housing, water pump, and radiator cap, low coolant level- I purchased brand new radiator, thought old one was plugging up maybe. Now today, as soon as i started it, it idled poorly, and seemed to be running on 2 or 3 cylinders. got it moving along and it seemed to clear up. got into boost and it started missing again. Seemed to drive ok under normal driving conditions. then temp guage climbed up again. parked it and opened up coolant resovoir, coolant was fiercly bubling even though it was not hot enough to be boiling...... Am I in need of a headgasket job???