Where is the thermostat on a 1998 Lincoln town car?

The thermostat on a 1998 Lincoln Town Car is located on the engine, typically near the cylinder head, and often under the intake manifold. However, you will likely need to consult a repair manual specific to your 1998 Lincoln Town Car's engine (either a 4.6L or a 4.6L DOHC) to get the precise location. A Haynes or Chilton manual would be a good resource. The location is not easily visible without removing some components.