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How to Replace the Thermostat on a 1993 Thunderbird

The thermostat in your 1993 Thunderbird is the part of the cooling system that regulates internal engine temperatures by regulating the flow of coolant between the engine and the radiator. When you first start the engine, the thermostat is closed, keeping the coolant in the engine and circulating it between the radiator and the heater core. Once normal operating temperature is reached, the thermostat opens and the coolant begins flowing throughout the whole system. Replacing the thermostat is a job you can perform with minimal tools or experience in about an hour.

Instructions

1

Locate the drain valve, also known as a petcock valve, in the lower radiator tank. Place the drain pan under the petcock valve and open the valve, allowing the fluid to drain into the pan. Remove the radiator cap.

2

Locate the thermostat housing by following the upper radiator hose from the radiator to the engine. The thermostat housing is at the end of the upper radiator hose.

3

Remove the two or three bolts that secure the thermostat housing to the engine by turning them counterclockwise with the socket and ratchet. You may need the universal swivel to access these bolts.

4

Grasp the thermostat housing where it connects to the upper radiator hose and pull sharply up at an angle to remove the housing. Make note of the orientation of the thermostat.

5

Remove the old thermostat. Use the gasket scraper to thoroughly clean off remains of the old gasket from both mating surfaces.

6

Install the new thermostat with the same orientation as the one you just removed.

7

Apply a thin coating of the RTV silicone to both housing mating surfaces and place the gasket against the housing.

8

Line up the bolt holes in the housing with those in the engine and replace the thermostat housing.

9

Install the retaining bolts by inserting them into the bolt holes and turning them clockwise until finger tight.

10

Torque the bolts to between 30 and 40 foot-pounds.

11

Close the petcock valve and pull the drain pan out.

12

Refill the radiator with the new coolant. Start the engine and allow it to reach normal operating temperature. Top off the coolant level as needed. Replace the radiator cap. Top off the overflow bottle as needed.

13

Pour the used coolant into a suitable container and take it to a local repair shop or parts store for recycling or proper disposal.

Posted by Unknown at 11:00 PM

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