Changing out a second generation Dodge Neon thermostat is a straight forward task that definitely falls in the DIY category.
A bad thermostat will cause a Dodge Neon or any car to overheat and needs replaced when bad.
As always call a mechanic if you don’t feel comfortable working on your own car.
Only a few tools are needed along with the thermostat which can be bought at any auto store or even on Amazon.
Items Needed
- Thermostat for a Dodge Neon (1999-2005).
- 10mm socket with an extension and ratchet.
- Large pair of pliers and screwdriver.
- Pan to catch leaking fluid.
- Thermostat gasket or silicon.
Steps to Replace Dodge Neon Thermostat (1999-2005)
- Be sure the car is cooled down and not hot. If the car is hot the coolant will be under pressure and can burst out scalding anyone nearby.
The thermostat is located on the left when looking into the engine compartment from the front. Place a pan under the car to catch any fluid that leaks out.
- Remove the coolant cap and remove the hose clamp. Some hose clamps have a screw on clamp while others have a pinch type clamp that is removed with a pair of pliers.
A second small hose also needs to be removed.
- Two 10mm bolts hold the assembly into place and need to be removed.
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After the 10mm bolts are removed the housing will come off and the thermostat will be exposed.
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The next step is to remove the old thermostat from the housing and insert the new one. The housing should be cleaned of any debris.
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The new thermostat will have notches that are aligned when inserting it.
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Both the thermostat housing and the engine should be cleaned so it can seal properly and not leak.
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Insert the new thermostat and gasket and put it back together.
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Reinstall the 10mm bolts and connect the hoses.
- Fluid will need to be added which will change after the Neon has warmed up and water flows past the thermostat.
The best way, in my experience, is to stuff a piece of newspaper (or equivalent) into the hole countersinking it so that anything scouring the mating surface will not catch on it or fall into the block’s water jackets.
Next, fairly lightly scrub the flange shaped flat mating surface until debris is removed. Then go back over fairly rigorously with Scotch Brite pad to smooth the surface.
Best case scenario? You have a small round drill attachment for said sand paper and Scotch Brite.
After all of that scrubbing, take the vacuum hose to your newspaper plug and suck it out. Try to sck all of the particulates away before getting it to pull the paper wad.
I took out my thermostat in my dodge due to it over heating. Now it never over heats and it still blows out hot air. Anyone know why? Just found it out before a new one in
What is the best way to clean the thermostat housing and the engine so it can seal properly. Is there a cleaner that needs to be used or do you just wipe it off till clean?
The best way, in my experience, is to stuff a piece of newspaper (or equivalent) into the hole countersinking it so that anything scouring the mating surface will not catch on it or fall into the block’s water jackets.
Next, fairly lightly scrub the flange shaped flat mating surface until debris is removed. Then go back over fairly rigorously with Scotch Brite pad to smooth the surface.
Best case scenario? You have a small round drill attachment for said sand paper and Scotch Brite.