I have a 2011 xle V6 that has 24,500 miles on it. Recently, the camshaft oil control valve in bank 1 went bad. I decided to change all of the camshaft oil control valves in bank 1 and 2. At the same time, I changed the spark plugs, oil and filter.
The engine has a truck like sound, not quite as it once was. There are no codes, the engine idles at the right speed with no fluctuation, and it accelerates normally. I have used fuel system cleaners to keep the injectors etc. clean.
I have tried using an automotive stethoscope to try and isolate where the sound is coming from.
I can’t find any singular origin.
Does anyone have any ideas about this?

 

Different weight of oil, filter issues?

Listen at the camshaft pulleys. The VVTi mechanism could be rattling.

 

The manual calls for 5w30 which is the oil weight I have been using. I also have been using Wix XP oil filters. I could try a different brand of filter to see if it makes a difference. I’ll also listen at the camshaft pulleys to see if the VVTi mechanism is rattling.
Thank you toyomoho for your ideas to solve the problem. I appreciate it.

 

Wix filters are excellent.