Why knocking in engine

Additionally, most larger vehicles utilize a timing chain to keep your engine running smoothly. These are significantly more durable. Many high-compression or high-performance engines require premium fuel to run as intended.

If your vehicle requires premium fuel and you discover a knocking noise coming from your engine, you should switch to premium fuel right away. Replace engine bearings: Replacing engine bearings is an extremely labor-intensive repair. This involves getting deep into your engine and resetting bearings that may have become misplaced or dislodged due to vibration or other faults within your engine.

This requires substantial skill and considerable time to complete, however, it can restore your engine to proper operation.

We strongly recommend leaving this service to a professional. Replace engine crank: One of the mechanical reasons your timing could be off is a damaged or broken crankshaft. Engine knocking happens when fuel burns unevenly and those shocks go off at the wrong time.

The result? An annoying noise and potential damage to your engine's cylinder walls and pistons. In other words, spark plugs are essential to getting your engine up and running!

Like other parts in your car, spark plugs age and break down over time. Most auto manufacturers recommend having new spark plugs installed about every 30, miles, but spark plug longevity depends on the condition and type of spark plug. Why it matters: Left unreplaced, faulty spark plugs could lead to a drop in engine power and a loss of fuel economy. Check out our handy guide to spark plugs to learn more about these little bolts of lightning.

What to do: Fortunately, spark plug replacement is a pretty budget-friendly fix. Firestone Complete Auto Care's tune-up service includes Bosch Iridium spark plug installation, in addition to air and fuel filter replacement and a fuel system cleaning.

Regular tune-ups can bring power and efficiency back to your car and potentially put an end to engine knocking. If you're not sure when your spark plugs were last replaced, schedule an appointment at your local Firestone Complete Auto Care. Our technicians can help you determine which tune-up service is right for you! If your engine was engineered to handle high-octane fuel, using the regular kind could lead to excess engine noise.

Why it matters: High-octane fuel does tend to be more expensive than regular fuel. While saving a few bucks at the pump may seem like a great reason to go with regular, engine knocking means it may be time to spend a little more. Long-term use of the wrong fuel could damage your engine and decrease your fuel economy. What to do: First, check your owner's manual.

What's your recommended fuel type and are you using it? This is called the power stroke as well. Arguably, this is the most important stroke in the combustion cycle. Depending upon how well the combustion occurs, all the factors are influenced by it. This includes the emissions, power and torque output, fuel consumption and safety of the engine and its components.

So, the timing of the ignition is of paramount importance. The timing is controlled by the ECU Engine Control Unit of the vehicle which sends out signals to carry out the necessary operations.

It receives inputs from various sensors and takes a look at what the driver wants from the steering angles, vehicle speed and throttle inputs. It is also referred to as the brain of the vehicle.

That means for every situation the car is in, there is a certain specific time when the spark plug will ignite the air-fuel mixture inside the cylinder of the engine. Every different point of ignition has different consequences in terms of engine performance power and torque output , efficiency and emissions. Also read: What are Catalytic Converters? How do they reduce emissions? Ideally the early the ignition timing, the more the power and torque output.

This translates to better performance, That is why all the new technologies aim at advancing the timing of ignition to make more power and enhance performance. If the ignition takes place late, that means that the piston might already start moving downward and the effect of the combustion will not be that effective. This means that the efficiency will suffer and a lot of work and energy produced by burning fuel will go to waste.

That is why there has to be a balance between the two. Another aspect is when the temperature and pressure inside the cylinder get too high due to compression alone. Then the air-fuel mixture might catch fire automatically even before the spark plug ignites the mixture. This is what is referred to as Engine Knock. When the mixture ignites prematurely in some pockets of the cylinder due to high-temperature and pressure. This is an unwanted explosion of air-fuel mixture and can cause severe damage to the engine components.

It will definitely affect the efficiency of the engine and might cause pistons to get damaged. That is why the ECU plays an important role in adjusting the ignition timing in such a way that the performance, efficiency and emissions are all taken care of. Also read: How does Variable Valve Timing affect performance and efficiency? Modern engines have a ton of electronic components.