Interesting. You can never trust the dealers, as some of them are really incompetent. You are 100% sure that they gave you the proper gasket?
If so, I say it's okay. Tighten it down with the proper torque specs and see how it goes. If it leaks, go to your dealer and
don't be nice....
EUROPROJEKTZ - NorCal Chapter
Ervin (Bay Area Detailer)