A blown engine can exhibit several symptoms, and the specific signs can vary depending on the type of engine failure and its severity. Here are some common symptoms of a blown engine:

1. Loud knocking or tapping noise.

A knocking sound coming from the engine can indicate severe damage to internal components such as pistons, connecting rods, or bearings.

2. Excessive smoke from the exhaust.

A blown engine may emit thick, colored smoke from the exhaust pipe. Blue smoke typically indicates burning oil, white smoke can be a sign of coolant entering the combustion chamber, and black smoke suggests a rich fuel-air mixture.

3. Overheating.

An engine that has blown may overheat quickly or constantly run at higher temperatures. This can be due to a loss of coolant circulation, damaged cooling system components, or compromised internal engine parts.

4. Loss of power.

If the engine has suffered significant damage, you may experience a noticeable loss of power while accelerating or difficulty maintaining speed.

5. Engine misfire or rough running.

A blown engine can result in misfiring, which is characterized by a rough idle, sputtering, or hesitation during acceleration. This can be caused by damaged spark plugs, valves, or other critical engine components.

6. Engine won't start.

In severe cases, a blown engine may refuse to start altogether. This can happen if the internal components are so damaged that the engine cannot generate enough compression or if the engine's timing is severely disrupted.

7. Oil or coolant leaks.

A blown engine may develop leaks, which can be seen as puddles or stains under the vehicle. These leaks can occur due to damaged gaskets, seals, or cracks in the engine block.

If you suspect your engine is blown or experiencing significant issues, it is best to have it inspected by a qualified mechanic or automotive professional who can diagnose the problem accurately.

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