- 1). Open the hood for access to the engine compartment. Pull the air intake line from the front of the engine compartment by hand. Wedge it out of the way, so there will be easier access to the thermostat housing.
- 2). Trace the upper radiator hose to the engine. Unscrew the hose clamp from the thermostat housing with a socket wrench. Pull the hose off the thermostat housing inlet pipe and away from the housing.
- 3). Unbolt the cover of the housing with a socket wrench. Scrape the old gasket material off both mating surfaces of the housing with a razor scraper. Ensure all the black debris is scraped off the surfaces.
- 4). Pull the old thermostat out of the housing. Insert the new thermostat by hand. Ensure the end with the spring is inserted first.
- 5). Squeeze a small bead of RTV silicone around the surface of the housing. Place the new gasket on the surface and allow it to stick to the silicone.
- 6). Bolt the mating surfaces together with a socket wrench. This will ensure the mating surfaces create a seal so coolant cannot leak out of the thermostat housing.
- 7). Slide the hose over the inlet pipe. Tighten the hose clamp over the hose and the pipe with a flat-tip screwdriver.
- 8). Push the air inlet line back onto the front of the engine compartment. Twist the radiator pressure cap counterclockwise to take it off the radiator.
- 9). Inspect the level of the coolant. Fill with pre-mixed coolant if the coolant is not visible at the neck of the radiator. Start the van and allow it to warm up, Once the van is warm, the level will decrease. Fill with coolant until the radiator cannot hold any more coolant. Tighten the pressure cap back onto the radiator.
- 10
Inspect for any leaks around the radiator. Close the hood and turn the van off.
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