Ariana,
Don't look at book values for your vehicle. The market is so out of control, it is likely more than you think.
As far as line pressure, there is a line pressure solenoid (pressure regulating solenoid.) I may be wrong, but I feel that is where the issue is coming from. Were you able to perform the pressure testing?
If you want to see what the part looks like, the OEM part number is XL2Z7G383AA.
And no, I don't feel this was caused by you. Also, the valve noise doesn't make sense. Can you record it and upload it for me to hear? The valve lash is controlled by oil pressure. Are you having issues with pressure?
I'm about ready to take a 3,000-mile trip. LOL
Let me know. I am so sorry I haven't been of more help.
Joe
Thursday, April 28th, 2022 AT 6:50 PM