Is Fixing a Blown Head Gasket Worth It?

head gasket, blown head gasketCounting the cost of the repairs and comparing it to the value of your vehicle is a smart thing to do anytime you get bad news from your mechanic.  This is something insurance companies have been doing for a long time when they decide whether to consider a car a total loss from an accident or recommend repairs to the owner.  Many insurance companies use the rule that if the repair value is more than 75% of the value of the vehicle they will consider it a total loss, so that is a good rule for us to use as well when we’re trying to decide if we should repair a vehicle or move on to the set of wheels.

Since you’ve already got a repair estimate in your hand the other piece of the equation is your vehicle’s value.  We recommend using sites like and as well as local classified ads for similar vehicles in similar condition to get an idea of the value of your vehicle.

One other very important thing to consider:

The other thing to consider in this whole equation is what other damage could have been done to your vehicle when you got a blown head gasket.

Other Damage Caused by a Blown Head Gasket:

  • Cylinder head damage
  • Engine block damage
  • Bearing damage

Cylinder Head Damage

Cylinder head damage can come in the form of warping, cracking or tunneling.  Warping is often due to overheating and can sometimes be fixed by machining things flat again.  Cracking can rarely be fixed and can be difficult to find with a simple visual inspection. Tunneling can happen when coolant leaks through to a cylinder for a long time and erodes the metal on the head.  This can sometimes be fixed by welding new metal on but often means the head casting is ruined.

Engine Block Damage

The engine block can have the same problems a cylinder head can from a blown head gasket.  Engine blocks are less likely to get damaged due to their materials used, amount surface area and the design of the block.  This is good news because replacing an engine block can be very costly. Even so, it’s still important to check the block deck for flatness before reassembling the engine.

Bearing Damage

Bearing damage can come from excess heat but is most often a product of having coolant in the engine oil.  If you pull out your engine’s dipstick and find your oil looking more like a chocolate milkshake then you’ve had a significant amount of coolant mix with your oil.  Water in your oil will allow your bearings to rust and wear out very quickly. If your head gasket leak has caused this problem you are almost always better off replacing the whole engine as a new head gasket will stop the leak but bearing damage has probably already been done.

If you don’t have bearing damage and the cost of replacing your head gaskets doesn’t make sense based on the value of your car, consider using BlueDevil Head Gasket Sealer to stop the leak and keep your car on the road.

You can find BlueDevil Head Gasket Sealer, you can find it at one of your local auto parts stores like:

  • AutoZone
  • Advance Auto Parts
  • Bennett Auto Supply
  • CarQuest Auto Parts
  • NAPA Auto Parts
  • O’Reilly Auto Parts
  • Pep Boys
  • Fast Track
  • Bumper to Bumper Auto Parts Specialists
  • S&E Quick Lube Distributor
  • DYK Automotive
  • Fisher Auto Parts stores
  • Auto Plus Auto Parts stores
  • Hovis Auto & Truck Supply stores
  • Salvo Auto Parts
  • Advantage Auto Stores
  • Genuine Auto Parts stores
  • Bond Auto Parts stores
  • Tidewater Fleet Supply
  • Bumper to Bumper Auto Parts
  • Any Part Auto Parts
  • Consumer Auto Parts

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blown_head_gasket.jpg – By Malkovstock – Licensed By Getty Images – Original Link