Blown Head Gasket Repair Cost [Know Your Options]

A blown head gasket is one of the more serious and costly issues car owners can face. If you’re facing this issue, it can be very helpful to know as much about the condition as possible to understand the costs associated with the repair. This article will provide an overview of the function of a head gasket, symptoms of failure, reasons for failure, and head gasket repair costs. We'll also discuss options for both DIY and professional repairs.

What is a Head Gasket?

The head gasket is a critical component of an engine, sitting between the engine block and the cylinder head. Its primary role is to seal the combustion chamber, enabling the engine to build the necessary compression for power and to prevent coolant and oil from mixing. Basically, it helps maintain the engine's optimal temperature and efficiency.

The head gasket endures high levels of pressure and temperature, making it one of the most stressed parts of the engine. Because of this, a blown head gasket can lead to significant engine performance issues and, if left untreated, can cause extensive engine damage.

Symptoms of a Blown Head Gasket

A failing head gasket usually presents some clear symptoms, including:

• Overheating: Since a blown head gasket disrupts the engine's cooling system, you may notice frequent overheating.
• White Smoke from the Exhaust: When the head gasket fails, coolant may leak into the combustion chamber and burn with the fuel, creating white smoke that billows from the exhaust pipe.
• Milky Oil: If coolant mixes with oil, it can cause the oil to take on a milky appearance, which may be visible on the dipstick or under the oil cap.
• Loss of Power: A decrease in engine power can occur due to a loss of compression.
• Bubbling in the Radiator or Coolant Reservoir: A blown head gasket can allow exhaust gases to enter the cooling system, resulting in bubbles in the coolant.

For more information read our full article on blown head gasket symptoms.

Why Do Head Gaskets Fail?

Head gaskets are designed to last a long time. They’re often good for over 100,000 miles. However, they are under immense pressure and exposed to intense heat from the engine. Over time, these factors can cause the head gasket to warp, compromising the integrity of the tight seal required for the engine to run properly.

Is Repairing a Blown Head Gasket Worth the Cost?

Repairing a head gasket is worth it if the car is relatively new, in good overall condition, and the cost of the repair is less than the car's market value or the cost of replacing it. However, it’s not worth repairing if the blown gasket has caused severe damage to the engine block, has high mileage, or other major issues. In these situations, the repair costs may exceed the vehicle's worth and you’re better off replacing the vehicle.

Cost of Head Gasket Repair or Replacement

DIY Leak Sealers

If you encounter the symptoms of head gasket failure, one of the first things to try is a DIY sealer such as CRC® FiberLock® Head Gasket & Block Repair. It’s a great solution to repair a leak in head gaskets, engine blocks and more. For about $50, it can provide a permanent fix or at least buy you some time to prevent further engine damage before seeking professional help.

Professional Head Gasket Repair Costs

Repairing or replacing a head gasket is labor-intensive, as it requires the disassembly of significant parts of the engine. The cost of the repair varies widely based on the make, model, and age of the vehicle, as well as the region and mechanic rates.

• Labor Costs: Professional head gasket replacement can take between 6 and 12 hours of labor. Labor rates vary but generally range from $75 to $200 per hour.
• Parts Costs: The parts for a head gasket replacement typically range from $100 to $500. However, some luxury or high-performance cars may have higher costs due to more specialized parts.
• Total Cost Estimate: On average, head gasket repair by a professional mechanic costs between $1,000 and $3,000 for standard vehicles. For high-performance or luxury vehicles, costs may rise as high as $3,000 to $5,000.

DIY Head Gasket Repair Costs

Attempting a DIY head gasket repair is not for the faint of heart. It requires a strong understanding of mechanics, access to specialized tools, and considerable patience. Here's a breakdown of potential DIY costs:

• Parts: As with professional repair, head gasket parts will range from $100 to $500.
• Tools: You may need to purchase or rent specific tools, such as a torque wrench, a cylinder head socket set, and a gasket scraper. Renting tools can cost around $50 to $100, while purchasing can range from $200 to $500.
• Additional Costs: It’s common to need new coolant, engine oil, and other fluids after a head gasket repair, which can add another $50 to $100.
• Total Cost Estimate: For DIY, total costs may be between $200 and $700, excluding your time.

Factors That Impact the Price of Head Gasket Replacement

There are many factors that impact how much you'll pay to repair a blown head gasket, including:

• Vehicle Type: Vehicles with large or performance-oriented engines are generally more expensive to repair.
• Parts: Purchasing directly from the vehicle manufacturer usually costs more than buying a new head gasket produced by an aftermarket provider.
• Labor Costs: Paying for labor is the most expensive part of a head gasket replacement. These costs vary based on where you live and can even fluctuate widely within the same city, so it’s wise to shop around and get at least three quotes.
• Engine Damage: It's sometimes cheaper to replace a head gasket that's starting to fail than it is to replace one that has failed completely, so be sure to see a mechanic as soon as you start noticing signs of a failing head gasket.

DIY Head Gasket Repair: Is it Feasible?

Repairing a head gasket on your own can be done if you have advanced mechanical skills, the right tools, and a suitable workspace. However, it’s a complex and time-intensive job that isn’t ideal for most DIY enthusiasts. The process involves disassembling major engine components, ensuring proper alignment during reassembly, and correctly torquing bolts. Mistakes during the repair can cause severe engine damage, leading to even higher costs.

While DIY repair might save money on labor, it is only practical if you are confident in your abilities, have access to a repair manual, and can dedicate several days to the job. For those without significant experience or specialized tools, hiring a professional is usually a more reliable and less stressful option.

When seeking a mechanic, it’s wise to get multiple quotes and check for ASE (Automotive Service Excellence) certification. Many repair shops also offer warranties on their work, providing peace of mind.

Summary of Head Gasket Repair Costs and Options

Tips for Extending Head Gasket Life

• Maintain Cooling System: Regularly check coolant levels and flush the system per the manufacturer’s recommendations to avoid overheating.
• Avoid Overheating: If you notice your engine running hot, address the issue promptly. Overheating is one of the most common causes of head gasket failure.
• Regular Inspections: Checking for symptoms like white exhaust smoke, milky oil, or power loss can help you catch gasket issues early.

Final Thoughts on Head Gasket Repair Costs

A blown head gasket is a costly and challenging repair that can vary significantly based on whether you choose a DIY approach or a professional repair. For those with mechanical skills and the necessary tools, a DIY repair might be a feasible option. However, if you’re not confident in your abilities, a professional repair is often the safest and most reliable choice. Taking steps to maintain your engine can help avoid head gasket issues altogether, saving you both money and time in the long run.