Tapping noise have M40 motor, no oil getting to camsharft

Injectors do make quite a racket but mostly they are so well insulated they can't be heard inside the car and in the engine compartment the noise just becomes part of the general engine noise.
I have noticed a few cars where the use of semi-rigid (nylon) fuel supply and return pipes transmit the noise to the bulkhead/firewall which magnifies the sound.

check oil level ---yes it can but tapping noise can be a lot more reasons --worn oil -low oil pressure--low oil level--rocker loose-worn or damaged lifter-worn damaged valves --timing chain --water pump--pulley --really anything can cause a tapping noise --try to isolate the area or sound and diagnose problem

It sounds like your rocker arms need to be adjusted if its coming from top of your motor

check the cam lobes are ok. If damaged then there will be noise and low performance

Not a vacuum hose. If it is coming from the top of the motor, I would first check the oil. If there is a hole punched into the oil pan , you may be very low on oil. If oil's fine, I would suggest looking at the transmission housing. If the manhole came up and hit the housing, it may have cracked that, or cracked the fly wheel. One more thing I'm thinking is that if the manhole hit your starter, and pushed it up, It may have cracked the fly wheel. This can make it sound like it's at the top of the motor. Very loud tap tap tap tap. If you excellerate, the noise will go faster too. I just can't see a manhole doing any damage to anything in the top of motor. Make sure you check the oil ASAP. Hard to tell without hearing it. A video would even help. Let me know what you come up with. Good luck

You possibly have a valve tap, do you rip on your motor a lot? If so you may have messed up the valve gauge and it could possibly be hitting the piston at a minuscule amount just enough to make a tapping noise.

dont drive it or youll lock up the motor. the tapping noise means your not getting oil to the motor. you need to see where the oil is leaking from

Oil light still on? means no oil pressure! If motor is tap , tap , tapping , Your gonna burn up your motor.May be oil pump, not going to like that bill.

Could be a lifter.. The lifters are what opens & closes the valves.. Oil passes through a tube in each lifter.. If the tube is clogged the oil wont get through and cause the tapping noise..

the tapping are the lifts tapping because there is no oil getting to the top of the motor. the blue smoke is the oil burning.could be the head gasket is going bad or the piston rings are done in.