my car has had a tappet/injector knock for a while naw. its sometimes really loud and other times quiet but never gone. ive been to 4 garages and asked them to just listen and tell me what they think it could be. 3 of them say they have no clue and want to take all my money and one other guy said its normal and is running well? OBVIOUSLY F**KING NOT!
So ive tried running on only shell diesel and tried injector cleaner but no luck. the car is smoking a little more then the usual car would but its not using oil or water? the smoke is like a blue/grey
so yesterday i had the engine cover of to disable the EGR and the tapping noise was nice and loud so i tried to isolate the problem.
the noise is coming from the 1st or 2nd injector (first injector being the closest to the front bumper) a friend revved the car slightly and the tapping increased with the revs.
i asked him to rev and at the peek of the revs (2000RMP ish) switch the engine of.
when he switched it of the noise was gone and the engine fell to a halt
the fuel wasn't going to the injectors so the injector knock was gone. if it was a tappet im assuming the noise would still be there after engine cut of?
what are ur thoughts?