Car Thermostat Replacement Cost

A car's thermostat plays an important role in regulating your engine's temperature. When it fails, your vehicle may start overheating or having trouble starting. Replacing a faulty thermostat is usually an affordable repair that most DIYers can handle with basic tools.

In this article, we'll cover the average cost of replacing a thermostat, signs it needs replacing, and the step-by-step replacement process.

Average Thermostat Replacement Cost

The national average cost to replace a thermostat ranges from $100 to $250, depending on your vehicle make and model. Labor usually accounts for a large part of the cost as thermostat replacements typically take 45 minutes to an hour for most cars.

Here's a breakdown of typical thermostat replacement costs:

• $100-150: basic sedan/compact car
• $150-200: mid-size sedan, truck, or SUV
• $200-250: full-size SUV, truck, or performance/luxury vehicle
• $50-75: labor cost at independent shops or dealerships
• $30-50: thermostat part cost

Some shops may charge a flat rate that includes labor and the thermostat part. Many independent mechanics charge less than dealerships too. Getting multiple estimates can help you find the best price in your area.

Signs Your Thermostat Needs Replacing

Here are some common signs that indicate it's time to replace your vehicle's thermostat:

• Engine overheating: This is usually the main symptom of a failed thermostat that isn't opening fully to circulate coolant.
• Temperature gauge stays pegged at the hot end.
• Rough engine idling or stalling soon after starting when cold.
• Coolant temperature takes too long to reach operating temperature.
• Steam or coolant leaking under car from the housing.
• Thermostat is over 10 years old on high-mileage vehicles.

If you notice any of these issues, it's a good idea to have a mechanic inspect your thermostat and cooling system. Catching problems early prevents more expensive repairs down the line.

Thermostat Replacement DIY Process

Replacing a thermostat is a straightforward DIY job you can tackle at home with basic hand tools. Here are the basic steps:

1. Drain Coolant

Remove radiator cap and connect drain hose or bucket to drain out old coolant. This may take 15-30 minutes to fully drain depending on system capacity.

2. Remove Housing and Thermostat

Locate thermostat housing (between engine and radiator) and remove bolts or clips to access thermostat assembly. Take care not to lose gasket or seals.

3. Remove Old Thermostat

Gently pry or pull out old thermostat from housing using pliers or a pick tool. Inspect housing for cracks or damage.

4. Install New Thermostat

Position new thermostat in housing with opening facing towards engine. Make sure it clicks securely into place.

5. Reinstall Housing

Clean and lubricate gasket or seals with coolant before reinstalling. Torque bolts or clips to spec with a ratchet or wrench.

6. Refill Cooling System

Refill radiator and reservoir with premixed coolant. Run engine for 5 minutes and recheck level when cool. Refill as needed.

7. Test Drive and Check for Leaks

Take a short test drive to bring engine up to operating temperature. Inspect for leaks at housing or connectors when cool.

With some basic hand tools and following the factory service manual, most homeowners can replace a thermostat in an hour or less. Let me know if you have any other cooling system questions!

In conclusion, a failing thermostat is an inexpensive and straightforward fix to keep your vehicle's cooling system functioning properly. Diagnosing issues early prevents costly breakdowns down the road.

With typical costs around $100-250, thermostat replacements are an affordable basic maintenance item well within reach of DIY mechanics at home.