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How easy is it to fix a cracked engine block?

After doing some checking up on my old car, I’ve noticed my engine block has a pretty significant crack. What can I do about this? How easy is it to fix a cracked engine block?

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Melanie Mergen · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
How easy it is to fix a cracked engine block depends on the severity of the fracture, but repairing the issue yourself is possible.
Common approaches to fixing cracks in an engine block include welding, patching, and using repair plugs.
It’s likely best to take this issue straight to a mechanic, though, unless you’re familiar with how to work with an engine block safely—and since it sounds like the size of the crack is fairly significant in your case, you should consult a professional first.
Before deciding exactly how you want to conduct repairs, you may want to get an estimate from your mechanic first. Repairing engine parts like a cracked engine block can be pretty costly, potentially ranging from $1,500 to $4,000 in some cases.
It may end up costing you less to simply replace the engine block. If you drive an older car, that could also mean the cost of the repair might exceed the whole value of your car, in which case your car would be considered totaled.
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