How to Replace a Thermostat in a Lincoln Mark 8
- 1). Locate the drainplug on the bottom of the radiator. Unscrew it using the socket wrenches and allow the coolant to drain out into a waste container.
- 2). Find the faulty thermostat. It is located directly under the power steering reservoir and has three hoses running from it. Use the screwdriver to remove the hose clamp on the hose entering the engine. Pull the hose off and use the socket set to remove the cover underneath.
- 3). Pull the thermostat out and replace it with the new thermostat. Replace the cover, reinstall the coolant hose, and refill the radiator with a 50/50 mixture of water and coolant. Start the car and allow it to heat to 210 degrees F. Observe the in-dash temperature gauges to pinpoint any inconsistencies in temperature.