How to Fix a Cracked Engine Block?

How to Fix a Cracked Engine Block?

The phrase “Cracked Engine Block” may be catastrophic to any vehicle owner. You begin to imagine hefty repair expenses and weeks without a vehicle. Of course, a broken block isn’t always as dreadful as it sounds, but there are a few things you should know before deciding how to continue. The information provided here should assist you in making the best option possible for your situation, whether you want to fix it or sell your car “As Is”.


What is Cracked Engine Block?

The engine block is the structure containing cylinders that holds the internal combustion engine’s components together to send power to the wheels, allowing the vehicle to move.

Other significant components also include coolant and engine oil. The coolant keeps the engine from overheating while engine oil acts as lubrication. This helps to minimize friction, which can assist in preventing overheating.

When an engine block cracks, the structural integrity of the framework that supports the cylinders, crankcase, fluid passages, and other components is compromised. In the worst-case scenario, driving your car may no longer be safe since doing so would simply exacerbate the problem or cause new ones.


How to Check a Cracked Engine Block?

If the crack in your engine block is minor, it’s possible you won’t notice it. This is why, unless the crack is big and obvious to the human eye, diagnosing the problem by simply searching for it can be difficult. As a result, it’s critical to be aware of the problems caused by the broken block. Here are some of the warning signals to look out for:

  • Engine Overheating – Fluids like coolant and anti-freeze may easily escape via a crack. These two are required to keep the engine at the proper operating temperature.
  • Engine Smoke – Another sign is blue or grey smoke coming from beneath the hood.
  • Oil & Coolant Mixing – Checking the oil cap is one technique to see whether there’s a crack in your engine block. Under the engine cap, you’ll notice a white gunky liquid, a possible sign of oil & coolant mixing due to a crack.
  • Fluid Leak – Fluid under your car is one of the most visible symptoms of a break in your engine block. While a leak does not necessarily indicate the presence of a crack. It does mean that you should keep an eye out for other warning indicators, such as overheating or poor performance.
  • Poor Performance – Cylinders in the engine block create the power for the vehicle. If this section of the engine is damaged, some of the energy from the controlled explosions may escape through the crack, resulting in low engine performance.


What Causes an Engine Block to Crack?

Overheating – the most common cause of a break in the engine block. The metal block expands as the engine heats up, then compresses as it cools. These narrow passages expand when the engine overheats. Tiny cracks may occur as a result of this. Repeated overheating causes the crack to grow in size and break through the metal.

Low Coolant – If your engine coolant is low, there’s little you can do to keep the temperature from increasing to unsafe levels, causing a break in the engine block.

Over-Performance – Excessive heat buildup might also result from overpowering the engine. Overheating can also occur when a turbocharger or supercharger is installed on an unsuitable engine. When these gadgets are installed, the engine is forced to create more power than it can manage.


How to Fix an Engine Block Crack

The cracked part can be welded, patched up with a cold metal patch, or repaired using repair plugs inserted by a professional mechanic.

Even if you’re really fortunate and your engine block can be restored, the assembling process is still difficult, and engine repair prices are often high. In addition, new bearings, seals, and gaskets, as well as routine service components and fluids fill up, will be required.

Depending on your vehicle’s type, the time necessary might be up to 35 hours.

If you’ve determined that you have a problem, your cracked engine block will almost certainly need to be replaced. While there are various commercial sealants that may occasionally seal small breaks, replacing the block is often the only choice. You might be looking at a repair price of $3,000 or more.



Stop driving immediately if you believe you have a broken engine block to avoid causing more harm to the vehicle. If your mechanic inspected your vehicle and diagnosed a cracked engine block, expect a large repair cost, as this is a major issue that will require time and skill to resolve. So, if you don’t have a few thousand dollars set up for this type of repair, you might want SpeedyCashForCars to buy your car.

We buy cars, trucks, vans, and 4×4 in any condition; whether you have a vehicle with a faulty mechanical issue or engine dead, we will remove your car and pay you top dollar on the spot.

Contact us today to get a free quote.