How long does it take to fix a thermostat housing?

Author: Ms. Nola Rogahn I  |  Last update: Monday, May 4, 2026

Thermostat replacement normally involves the removal of other parts, such as throttle housing and throttle body, as well as draining and refilling the cooling system, but should take a home mechanic around a couple of hours or so.

Can you drive a car with a bad thermostat housing?

Driving a car with a broken thermostat is not advisable. The thermostat regulates the engine's temperature by controlling the flow of coolant. If it's stuck closed, the engine can overheat, leading to severe damage such as a blown head gasket or warped cylinder head.

How much does it cost to replace a thermostat housing?

The average cost for a Thermostat Housing Replacement is between $506 and $550. Labor costs are estimated between $134 and $169 while parts are priced between $373 and $382.

How serious is a thermostat housing leak?

Although it's possible to drive with a damaged thermostat housing, it's highly recommended that you don't. Ignoring a coolant leak is flirting with disaster, and cooking your engine can ruin your whole day. It's best to enlist the help of a mechanic to check your thermostat and replace the faulty parts as needed.

Can I replace thermostat housing myself?

No! If you have the tools required, you should be able to replace a thermostat yourself. There are instructions with the new thermostat that will tell you exactly how to do it but if you don't feel comfortable doing it yourself, you can hire a local handyman, HVAC tech or electrician.

How to Replace a Bad Thermostat in Your Car

How many hours does it take to replace thermostat housing?

It can take up to 2 hours. It costs from $100 to $300. To ensure the complete solving of the thermostat problem, replacement is better than repair, as the car gets a new part. It also helps to extend the lifespan of the car's cooling system.

Why does thermostat housing fail?

Erratic temperature readings in the instrument cluster will usually cause the thermostat housing to fail. If this happens, the wrong amount of coolant may be sent to the engine which in turn will cause the thermostat housing liquid to either underperform or over-perform.

How do you know if you need a new thermostat housing?

7 Signs You Need to Replace Your Thermostat
  1. Your HVAC Keeps Turning On or Off. ...
  2. Faulty Thermostat Readings. ...
  3. Suspiciously High Energy Bills. ...
  4. Constant Temperature Shifts. ...
  5. Thermostat Is Too Old. ...
  6. Thermostat Fails to Respond to Changed Settings. ...
  7. Your HVAC System Short Cycles.

How to fix a cracked thermostat housing?

If the leak is at the flange gasket, remove the housing, scrape to remove all residual gasket material, apply sealant and a new gasket. Torque to spec. While you have the housing off, good idea to remove and replace the thermostat. If the housing is cracked, same as above, but of course, install a new housing.

Will K seal fix a thermostat housing leak?

K‑Seal can only fix leaks in 'solid' parts of the cooling system including the head, head gasket, block, core plug, radiator and heater core.

How long does a car thermostat housing last?

A car thermostat is designed to last a long time – typically around 100,000 miles or 10 years. However, various factors can impact its lifespan. First, driving conditions play a role. If you regularly drive in hot weather or stop-and-go traffic, your thermostat may suffer additional stress.

What tools do I need to replace thermostat housing?

TO REMOVE AND INSTALL A THERMOSTAT, YOU WILL NEED:
  • A clean rag.
  • New thermostat.
  • Gasket and gasket sealant.
  • Screwdriver or pliers.
  • Small socket wrench.
  • Small adjustable wrench.
  • A small scraper or wire brush.
  • 9 L bucket or drip pan.

How much do contractors charge to install thermostat?

The cost to install a thermostat is $182 on average, but you could pay between $113 and $264. Thermostats play an important role in our daily lives, cooling us down during the sweltering summer heat and keeping us warm and cozy during winter. While the average cost to install a thermostat is $182, pricing can vary.

How does a car act when the thermostat is bad?

You Notice Erratic Temperature Changes

If you notice sudden and erratic temperature changes from cold to hot or hot to cold, then it could be a sign that your thermostat has stopped working correctly. Get your vehicle inspected if you notice these extreme temperature changes in your vehicle interior.

How many miles can you drive with a bad thermostat?

While some vehicles could still make it as far as 20 miles, we would never recommend driving very far with an overheating engine. Continuing to drive an overheating car can lead to costly repairs and possibly even complete engine failure.

What does it mean when the temperature gauge doesn't move?

The most common causes behind a temperature gauge that isn't working include a faulty coolant temperature sensor, broken thermostat, and air trapped in the coolant system. A temperature gauge displays the current temperature of your vehicle's coolant.

How long does it take to change a thermostat housing?

Thermostat replacement normally involves the removal of other parts, such as throttle housing and throttle body, as well as draining and refilling the cooling system, but should take a home mechanic around a couple of hours or so.

How do I know if my thermostat housing is bad?

As the engine overheats, coolant will overflow out of the thermostat housing. This means that coolant leaking out of your engine could be a sign that your thermostat has gone bad. It can also be a sign that you have a problem with your radiator hoses, the radiator itself, or the seals and gaskets.

How much does it cost to fix a cracked thermostat housing?

How much does it cost to replace a car thermostat? The average cost of replacing a car thermostat is £150, with prices ranging from £95 and £215. If the faulty thermostat has caused overheating, it can result in damage to other parts of the engine such as the head gasket which is a further, more costlier repair.

What is included in a thermostat housing?

Typically, the housings include a main body that's sand-cast, then two machined parts inserted into the main body—a top smokestack, and an arm. Inside the vehicle, the housing will serve as a home for the car's thermostat.

What is the average life of a thermostat?

On average, most thermostats last about 10 years, depending on the model, usage, and proper maintenance. However, many people decide to replace their unit sooner to take advantage of new energy-saving technologies.

Can a bad thermostat housing cause overheating?

Without a functioning thermostat, your engine can either overheat because the coolant isn't circulating properly, or it can take too long to reach the proper operating temperature, which can also cause engine problems over time.

Will a bad thermostat throw a code?

While there is a small chance that there is an issue with the running temperature of your engine, by far the most common issue with trouble code P0128 is a faulty thermostat. The exact location of the thermostat and issues related to a damaged thermostat may vary depending on your vehicle.

Can a bad thermostat cause a blown head gasket?

Blown head gaskets can happen when an engine severely overheats due to a faulty thermostat, clogged radiator, leaking water pump, radiator, radiator hose or heater hoses or when the coolant in the cooling system is not changed per the O.E.M.'s scheduled maintenance.

How to tell if a water pump is bad?

Symptoms of a Failing Water Pump

Overheating is an obvious symptom of a failing water pump. Drivers should make sure the needle on the engine temperature gauge doesn't go into the red. A warning light should also illuminate to tell the driver the coolant is getting too hot.

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