couple questions C4 petrol (lifters, lutch, bad sound)

[c4newbie]

Hi i recently bought c4 1.4 16v and have couple problems. Clock is at 170k km. I do belts change and oil change.
After oil change i notice that lifters are loud when its cold and when its warm its less noisy but noticeable, they also do tak-tak-tak like diesel. I assume when i change all lifters it will be ok.

Also i have other problem when engine works in place engine rpm vary between 650-850 rpm, on clock in car look steady on 900rpm but i hear difference in cabin and lexia shows variations (i dono is that normal) can that problem be related to lifters ? Because on lexia all other parameters look normal, spark is on 2,2ms and all other things, also no any error.

Other thing is when engine is could on morning, when i starting from place and releasing clutch with low throttle in 1st gear, entire cars shaking with loud sound dang-dang-dang, vibrations coming from engine and i feel on pedals, and engine is very loud in 1st and 2nd gear when i drive, later when engine is hot it have normal sound (except lifters ) no shaking at all , don't have that problem when performing same operations. Is that problem related to clutch or there is no good combustion (air/fuel levels)?

Thanks.

[myglaren]

In my inexpert opinion I'd say that your valve timing is out slightly, which would likely have happened when fitting the timing belt.
I believe that there is a correct procedure to fitting the belt then adjusting the tensioners otherwise the belt turns the camshaft slightly, which puts the timing out a bit.

Someone who knows more about this will give a more accurate description and method of fitting the belt correctly.

[c4newbie]

Thanks. That was my opinion also but my repairman assures me that he put timing properly because he do that on more then 300 engines.
More opinions?