Update:
i found today that my timing is off by 10° so maybe my chain needs to be replaced but i still not able to remove that damn stupid pump and if i used too much force im gonna brake that poor aluminum housing maybe i'd give up to repair other important things first
i also recorded all noises in my old tired engine
https://www.youtube.com/watch?v=uTqc-xHguMI
https://www.youtube.com/watch?v=4Y2WLO9ovYE