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How much is head gasket repair on a Subaru Outback?

The average cost to repair a head gasket on a Subaru Outback can range from $1,500 to $2,500, depending on the specific model year and other factors. This repair is considered a major engine job and typically involves replacing the head gasket, as well as inspecting and potentially replacing other related components.


What is a Head Gasket?


The head gasket is a critical component in an internal combustion engine that seals the connection between the engine block and the cylinder head. Its primary function is to prevent coolant and engine oil from leaking into the combustion chambers, as well as to maintain the proper compression levels within the engine.


Causes of Head Gasket Failure in Subaru Outbacks



  • High mileage and age of the vehicle

  • Overheating of the engine due to coolant system issues

  • Excessive engine vibration or stress

  • Improper maintenance or repair of the cooling system

  • Manufacturing defects in the head gasket material


Subaru Outbacks, particularly older models, are known to be susceptible to head gasket failures due to the design of the engine and the materials used in the head gasket.


Symptoms of a Failing Head Gasket



  • Coolant leaks or low coolant levels

  • White, milky-colored engine oil

  • Overheating or temperature fluctuations

  • Loss of engine power or performance

  • Visible exhaust smoke or steam


If you notice any of these symptoms in your Subaru Outback, it's important to have the vehicle inspected by a qualified mechanic as soon as possible to prevent further damage to the engine.


Repair Process and Costs


Replacing a head gasket on a Subaru Outback typically involves the following steps:



  • Draining the coolant system

  • Removing the cylinder head

  • Inspecting and replacing the head gasket, as well as any other damaged components

  • Reassembling the engine and refilling the coolant system

  • Testing the engine for proper operation


The total cost of this repair can range from $1,500 to $2,500, depending on the specific model year, labor rates in your area, and the condition of any other related components that may need to be replaced. In some cases, the repair may be more cost-effective than replacing the entire engine, making it a worthwhile investment to keep your Subaru Outback on the road.

Do Subaru Outbacks have head gasket problems?


2010-2012 Outback and legacy uses a MLS version of the head gasket found in the 2.5l, while this resolves any external oil and coolant leaks we have found they can and will fail internally around 120-150k and almost a guaranteed failure if the Subaru is ever ran low on coolant.



At what mileage do Subaru head gaskets fail?


The head gaskets on many Subaru's have a high rate of failure. They should last 100,000 miles in ideal conditions.



Can you drive a Subaru with a blown head gasket?


Technically you can drive with a blown head gasket, but we'd always advise against it.



Is it worth fixing a blown head gasket?


Changing a head gasket can be worth it, especially if the vehicle has significant value, is in good overall condition, or if it has sentimental value. A blown head gasket can lead to severe engine damage if not addressed, so repairing it can prevent further issues.



Is it OK to drive with a blown head gasket?


We strongly recommend not driving when your head gasket has blown.



How much does it cost to replace a Subaru Outback head gasket?


$1200 to $2500
The exact cost can vary depending on several factors, including your location, the model and year of your Subaru, and whether you opt for dealership or independent repairs. On average, expect to pay anywhere from $1200 to $2500 for a head gasket replacement in a Subaru. This amount includes both parts and labor.



What are the signs of a head gasket going?


If you are concerned that your head gasket might need to be replaced, look for the following symptoms.

  1. Engine Overheating.
  2. Rough Idle.
  3. Visible Tailpipe Smoke.
  4. Milky Build-Up Under Oil Cap. There is an easy way to find out if your engine's head gasket has blown.



What is the life expectancy of a Subaru Outback?


200,000 to 300,000 miles
With regular maintenance and responsible driving, Subaru Outbacks typically last 200,000 to 300,000 miles. Their high-reliability ratings and solid build quality place them among the top contenders in longevity, giving them a 22.3% chance of surpassing 250,000 miles—well above the industry average for SUVs.



What is the cheapest way to fix a blown head gasket?


Follow these guidelines and you'll be back on the road in no time at all:

  1. Remove thermostat and flush the cooling system.
  2. Fill the system with water.
  3. Add BlueDevil Head Gasket Sealer slowly to the radiator as the vehicle idles.
  4. Install the radiator cap and allow the engine to idle for at least 50 minutes.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.