3 weeks ago our PCV valve failed and my 2019 Ascent broke down on the highway. I was not able to get the PCV replaced earlier due to dealer being unable to source parts on prior service visits. The dealer removed the engine and located the 4 pcv parts in the oil pan and reinstalled the engine. They also replaced both the front and back Catalytic convertors. They returned the car and after looking under the hood I noticed there was almost no coolant, and the car was full of Ants in both the cabin and engine. So it went back to the dealer who kept it another week. They test drove it multiple times and claim everything is fine and that they just forgot to fill the coolant up after they put the engine back in. Now when I drive it the shifter feels pretty rough compared to before. There is often a loud humming sound and sometimes when shifting from P to R there is a large jolt and cracking sound. We do use the parking brake so it is not that. The dealer is saying that the sound is normal, but both my wife and I never had that problem before or on any other Subaru. All in we have not had our Ascent for almost a month now and are getting very frustrated. Has anyone else had problems that started after having their engine pulled out for the PCV valve? Our Ascent is still at the dealer now just parked in their lot until they have time to look at it.