It may help the forum if you can add
- last time oil/filter changed & mileage.
- any other issues immediatley prior to the new noise, any garage work completed etc
Thanks
-Last time oil and fillter change was on April 2021 when was 92000 miles ( It has now 102000 miles)
-It was Shell Helix 5W-30 Ultra Professional AF Ford Fully Syn M2C 913D Oil
-there was no other issues immediatley prior to the new noise .There was no garage work.
I noticed that there is no noise when engine is cold.
When engine is warm on idle speed (not under load) the noise start and seems to me constant.
When engine is under load (accelerating or when cooling fan switch on the noise stoping)
I took off serpentine belt to see if this is no water pump/ ac compressor or alternator, but after starting engine without belt for half an minute the noise was still existing