It's unlikely that they damaged it but it's a little negligent on their part not to recommend replacing those seals while they had the timing belt off.

Answered by Wrenchtech (expert)
14,749 answers provided

Thanx for your reply.
But it didnt have any oil leak at all before changing the timing belt. I had it checked at two different dealerships before taking the car to this one.
Is it possible that they were careless when doing the timing belt and damaged it accidentally, (like by lifting the engine, etc)

Thank you

Response from amir200022000
2 questions asked

The same day that they did the work on t-belt, They also changed some o-rings for the power steering pump as it was noisy due to some air in the lines, Is it possible that when doing that repair, they do some damage to the back main seal of the engine. I did some research on the internet and apparently for some of these services they need to lift up a little bit the engine or transmission which can cause this problem.

Thank you very much for your time

Response from amir200022000
2 questions asked

If you're talking about the REAR main seal, there is no way they were anywhere near it.

Answered by Wrenchtech (expert)
14,749 answers provided