Most likely cause-valvetrain noise, check oil level, pressure, also possible engine knock. If you have a knock sensor, mil should be illuminated
loose exhaust
hydraulic lifter? Rocker arm?
A tapping noise might come into the engine because of heat damage to the lifters of the motor. You might also hear a tapping sound if the engine has been damaged due to a blown head gasket.
when the noise come.
Stuck hydraulic lifter.
When I use the signal it makes lot of noise
Most probably the noise is piston slap, this noise is heard when the engine is cold and disappears when the engine is hot. if the slap is very strong when the engine is cold and the noise becomes less when hot but still the noise can be heard.
possibly low oil or low oil pressure, the tapping may be coming from the oil operated hydraulic lifters.
after market oil filter have been known to cause engine noises in kia's
Try going to a LIGHTER weight of engine oil. That should solve it.
i have a very loud tapping noise in my BMW 318i e36 1993 engine. its extremly loud on start up then drops down to very loud when idling. the noise never goes away. I've had people say the engine was about to throw a piston, i need a new engine, etc what could it be and is it possible to fix?
Tapping in a diesel engine often means a valve lifter is beginning to fail. It can also mean that sub quality fuel is being used.