Why can we hear sound better at night than day?
You may wonder, it is because it is quieter at night than in the daytime. Actually, sound transmits farther at night may be related to refraction of sound waves! First, sound is the vibration of air, and it is a kind of wave motion. The propagation of sound wave is faster in hot air and slower in cold air.
Why does my engine make noise when I cold start my car?
The dry sump oil system is hard mounted to the body of the vehicle and at cold start the oil moving through the system can transfer the noise to the body. This is a normal dry sump oil system operating characteristic and no repairs should be attempted. We were unable to load Disqus.
Why does my car make a clicking noise when I start it up?
The sound may be more noticeable during a cold start, but lessens once the engine is warm. A slightly higher pitched clicking sound is the fuel injectors pulsing under the high fuel pressures.
Why does a V10 sound so loud in a cold start?
V10s sound especially violent during a cold start. To start with, a car’s ECU decides that the engine has to idle higher when the engine is cold to stop it from stalling. This is programmed into the ECU via a start-up map, which allows a richer air/fuel mixture to enter the cylinders.
What does it mean when an engine rattles on a cold start?
When the engine gets older it will start to rattle more and more on cold starts and this is a sign that the timing chain is getting worn out.
The dry sump oil system is hard mounted to the body of the vehicle and at cold start the oil moving through the system can transfer the noise to the body. This is a normal dry sump oil system operating characteristic and no repairs should be attempted. We were unable to load Disqus.
What to do about engine ticking noise when cold?
If you determine the engine oil is more than one quart low, the oil viscosity is wrong, or the oil is in poor condition change the oil and filter. Wait until the engine is cold, or at least 2-hours. Then start the engine oil and filter, replace all 8 active fuel management (AFM) valve lifters.
V10s sound especially violent during a cold start. To start with, a car’s ECU decides that the engine has to idle higher when the engine is cold to stop it from stalling. This is programmed into the ECU via a start-up map, which allows a richer air/fuel mixture to enter the cylinders.
Why does my car make a loud noise when I change gear?
This noise is usually heard when you drive your car, change gear and accelerate. The sound seems as if something inside the engine is knocking hard against the engine. Usually this is the result of early ignition of the air-fuel mixture, which is supposed to burn at just the right time to produce optimum performance.