its a a rev count when it gets high you should change gear or you'll wreck your car
A knocking noise can occur from worn engine mounts. When the rubber insert on the engine mounts are old and brittle the chassis is not protected from the weight of the engine. Creating loud vibrations that get louder as the vehicle goes faster.
Could be your timing belt.
Diesel trains are louder than electric trains because you the noise that the diesel engine makes, which is louder than the electric engine.
if the noise is a squeeling sound, check the drive belt, if worn change it @£17 if the noise is a squeeling sound, check the drive belt, if worn change it @£17
when warmed up high pitch noise at idle and it gets louder during acceleration Response to : Can someone actually answer this question? This is my question and the above answer makes no sense.
If this is a general noise, it could be the transaxle. When you are accelerating, the engine is pushing the gears, and when you let go of the pedal, the vehicle starts to shift back down. If this is an engine noise, it could be predetonation or a valve problem.
the engine the engine
The knocking noise is commonly called spark knock. The knock can be called by the engine timing not being set correctly, or using gas that has too low of an octane for the engine.
Loose belt - will sound like a screeching noise.
Most likely needs a tuneup done. Check the timing and change the normal tuneup part.
Can be a multitude of things. First see if its from inside the engine bay and occurs while in neutral reving the engine. From there check your headlight assembly.
A plane sounds much louder landing than on take-off. A single engine land plane revs up the engine to maximum power for take-off and climb-out. Maximum power equates with maximum noise. While landing, the same aircraft typically has the engine idling. Idling equates with minimum noise.