A valve lifter noise when the engine get warm

classic HLA problems see now for 80 years if V6/8 engines up.
they are gunked up in side.
or oil pressure is too low. (pump screen clogged)
do not read post here about valve lash, this engine has HLA
we can/t guess of other owners play around with lifters and rockers.
did it all wrong,
but here they are HLA roller , hyd. lash adjusters
as on AUTOMATIC LAST AT ZERO LIFERS
IF OIL PRESSURE TO THEM FAILS THEY FAIL.
IF PATH OF OIL FAILS TO THEM THEY FAIL
AND IF THEY ARE GUNKED UP THEY FAIL
OIL COME THE GALLERY AND LANDS AT THE TINY ONLY SEEN
BELOW WITH A RED ARROW.
most folks just put in a new set and cross fingers.




here they are , in all their Glory , lifters

https://www.rockauto.com/en/catalog/chevrolet,1996,c1500+pickup,5.7l+v8,1031500,engine,valve+lifter,5548

Most engines now use hydraulic lifters and they can leak a little, this causes space between then lifter and the push rod. This results in a tapping noise that goes away when they get warm or fill back up.

Wrong oil. Check the engine temp and thermo. Make sure oil is compatible with service. eg. your driving style and the weather. Castrol is pretty good oil. I used it in air cooled motocycle engine to solve shifting problem in hot weather. All lifters do not get the same cooling. That one is prob running a bit warm. good luck with that.

petrol or diesle probably just a week lifter valve if its just faint dont worry will last for years

The numbers you have given relate to the cylinder heads used in Mercedes cars. There are a few different models that use this head in it. These are the ones listed for that particular cylinder:
1)MERCEDES C-CLASS -97 200 KOMPRESSOR ELEGANCE M111.944 5VX 4DR SED BENSIN
2)MERCEDES C-CLASS -00 5DCBI 200I 5VXL SER ABS 2,0I 5-MANUELL 5DR CBI BENS
3)MERCEDES CLK-CLASS -00 2DCOUPE 230KOMPR AUT SER ABS 230 KOMPRESSOR AUTOMAT
4)MERCEDES ML-CLASS -97 MB 230


In other words, you'll need to get more information than what you have currently.

If it is on the top of the engine, it could be valve stem is bent, lifter knock which is most common, could be valve keeper, or just needs adjustment which usually helps in most cases.

1 of two things. They are hyd lifters so there is no adjustment to be done. So it is either a lack of oil pressure or an odd thing but does happen, a small piece of derbis will get into the pressure bleed hole, the oil is push out as the camshaft comes up to open the valve, the lifter will collapes and not re-pump up due to the hole being closed off. Im quite sure AMG rquires Mobil1 oil, sometimes extream temps either higher or lower will change viscosity requirements. you may need the 15W 50 to maintain enough pressure where you are at or it is possible the oil is broke down so bad that it is no longer able to maintain the correct amount of PSI. 1st things first. Put a mechanical oil pressure gauge on the motor, observe pressure after complete warm up. If it is too low go to the 15W 50 weight oil. If it is an oil pressure issue two things should happen. 1 the lifter making noise should be farthest from the pump. If not you should do a very carefull inspection check psi with mechanical gauge 1st if it's low, then you'll have to find the causeor cause. if psi is within spec you have a bad lifter IE: dirt or collapsed spring.

I would check your injectors, as if they are leaking slightly, the residual fuel pressure can force some fuel into the manifold even with the car off, and it it can cause temporary flooding.

Please leave positive feedback if I have helped you

thanks

hello,good day,ticking noise can be from spark plug suppressor,defective high tension cable,manifold gasket,or maybe coming from your hydraulic valve lifter, thanks

THE HUMMING NOISE IS YOUR SECONDARY AIR INJECTION PUMP. THEY TEND TO BE NOISEY AT START-UP. IF IT IS NOT WORKING COREECTLY IT WILL SET A CHECK ENIGNE LITE. THE CLICKING NOISE IS NORMAL IF IT GOES AWAY AFTER WARM-UP. THESE MOTORS ARE NOISEY WARMING UP DUE TO THE HYDRAULIC LIFTERS.