1996 Nissan 240 SX mileage: 100,600. We noticed the car leaking antifreeze. We had the car checked, but after the pressure test, there was no leak. Four days later, the same thing happened. Does this mean the car will overheat even if it is a phantom reading? I would like to change out the thermostat myself, but is this a good idea? Is it fairly easy in this car? Thanks in advance.
Cooling system leaks are sometimes hard to find. A pressure test does not always locate them. Check the engine and radiator for fresh coolant stains. Check the water pump closely. Your car will overheat if it is low on coolant. Also check exhaust for white smoke, which may indicate internal engine problems.