2.2 TiD: impact damage at 120tkm

Hello Saab community, it caught my ’99s 9-3 TiD: Sudden clacking in the cylinder head, diagnosis shock damage. What is surprising to me is that this happens already at 120tkm, although the car is only moving gently + long distance, oil change all 10tkm. My question: If I have the shocks changed properly, it is to be feared that further damage occurs promptly, i.e. increased risk of damage? Or is the engine still good for 300tkm? Maybe I have to auc h just debit under the heading bad luck. The used car warranty runs only a few months, therefore my slight restlessness. Thank you for reply! Greetings Xyacht