I have xj12 series 3 1991. About moth ago the engine started to “whine” between 1500 - 3000 rpm. Inside of car you can hear the strong"whine". Outside in engine compartment whining sound is bit damped because of all the other noises engine makes. There is also notable vibration outside of the car near engine.
The whining sound is there with gear(s) on, whiteout gear, and reverse.
Here is the link to the video from inside of the car, where you can hear the whine.
- The jaguar specialist changed all the engine mounts to new ones. Whine is still there.
- He also all belts away and the sound/vibration was still there when running the engine.
What this could be? We are baffled