A restricted exhaust, possibly a plugged cataylitic converter.
That is the normal sound of the pressure equalizing in the system.
Pressure waves in the air.
Vibrational motion causes sound. When an object vibrates, it creates pressure waves in the air that our ears perceive as sound.
The gurgling sound is caused by pressure in the engine coolant system(antifreeze) slowly releasing into the coolant overflow resevoir. Typically a faulty thermostat causes this sound.
Loudness: Sound power is the cause, but sound pressure makes the effect. Scroll down to related links and look at "Sound pressure and sound power - Effect and cause".
When a guitar string is plucked, it vibrates. The vibration of the string causes pressure waves in the air. The pressure waves are called "sound".
Hi, this is a common problem with subaru's - you need to get the cooling system pressure bled - i.e there is air in your cooling system.
Turbulence. Be it normal or abnormal, the "sound of blood" is always turbulence. This includes what you hear when you take a blood pressure ... which is a major source of error IF blood flow is abnormal (as in shock).
what causes aknocking sound on mazda T35 engine when its running
with out lub dub or other abnormal abnormal heart sound
This sounds like vacuum leak in the braking system. Check for disconnected or cracked hose from the engine to the brake booster in the engine compartment.
counterbalancer is bad