Aside from the want to bleed engine coolant, replacing the thermostat is a relatively intelligible assignment.
The thermostat is an meaningful Element of the Dodge and Plymouth Neon's cooling method. The thermostat helps frank the temperature of the engine by allowing another engine coolant to pass over the engine when it exceeds a sure temperature area. Provided the thermostat becomes stuck in the "frank" position, the engine Testament not be able to pleasant up quickly. Whether it fails in the "closed" position, the engine Testament overheat, causing catastrophic damage provided the thermostat is not replaced in continuance.
Removing the Old Thermostat
1. Sincere the hood and disconnect the contrary terminal cable from the battery. Avow the engine to gelid down before performing any drudge.
2. Distance a extract pan underneath the passenger side of the radiator. Establish the radiator empty plug and remove it from the radiator. This Testament Proceeds the engine coolant from the radiator.
3. Replace the upper radiator hose to the thermostat housing on the engine. Allot and remove the coolant overflow hose from the thermostat housing. Concede any remaining coolant to remove into the withdraw pan.
4. Loosen the retaining clamp from the upper radiator hose with a flat-head screwdriver. Pull the radiator hose off of the thermostat housing. Allow any remaining coolant to drain into the drain pan.
5. Remove the two mounting bolts securing the thermostat housing to the engine with a ratchet and socket set. Pull the housing off and then remove the thermostat and O-ring.
Installing the New Thermostat
6. Scrape off any remaining gasket residue with a flathead screwdriver. Make sure the mounting surface is clean before installing the thermostat and O-ring.
Reattach the drain plug to the bottom of the radiator. Remove the drain pan from underneath the radiator and dispose of the engine coolant in a safe manner. Refill the coolant system with fresh engine coolant. The small vent on the thermostat should be facing the 12 o'clock position. Place the thermostat housing over the thermostat. Reinsert the two mounting bolts and tighten them with a ratchet and socket.
8. Reattach the upper radiator hose to the thermostat housing. Position the retaining clip over the hose where it fits over the opening on the thermostat housing and tighten it with a flathead screwdriver. Attach the coolant overflow hose to the thermostat housing.
9.7. Place the O-ring on the mounting surface. Insert the new thermostat into the mounting area.
10. Reconnect the negative terminal cable to the battery and start the engine. Check the area underneath the passenger side of the engine and around the thermostat housing for any leaks. Monitor the Neon's coolant levels and add fresh coolant as necessary.