- 1). Clean the area that surrounds the thermostat on the intake manifold, as well as the thermostat's housing. Because the thermostat regulates antifreeze, the thermostat is a common place for leaks to develop. Cleaning these surfaces will ensure that the thermostat's gasket will seal properly. The surfaces can be cleaned with either a gasket scraper or with the blade of a flathead screwdriver.
- 2). Position the thermostat into place within the engine. Note that one end of the thermostat features a spring. The thermostat must be positioned into the engine so that the spring faces the engine.
- 3). Apply gasket sealer to one side of a new thermostat gasket, then press the coated side of the gasket onto the thermostat housing.
- 4). Apply gasket sealer to the exposed side of the gasket, then lower the thermostat housing over the thermostat until the housing rests against the intake manifold.
- 5). Slide the thermostat housing's retaining bolts through the housing and into the intake manifold.
- 6). Tighten the thermostat housing's retaining bolts to the proper torque specification with a torque wrench. The proper torque setting can be found within the engine's specifications manual, and is typically between 10 and 15 foot-lbs of torque.
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