M62TU Knocking Noise

[BladeX5]

Hi guys,

My X5 has been doing a strange noise when warmed, which is like a knocking sound that started about 6 thousand miles ago when I switched to a full synthetic oil (Mobil 1 5W-30). Last owner was using Castrol Magnatec 20W-50 (very common in my country and weather) for a long time, and when I did the switch it seems she didn't like it after 4k miles.

After that, I switched back to the same oil that was using the last owner, but didn't make any difference. I still get this noise when warmed.

I've seen a lot of other videos and some refers to chain and guides work, others to VANOS rebuild, and some to vacuum leaks (something that I have had before with this vehicle).

As a prevented measure I've changed the following parts:

- Tensioner to a new one with the revised version, however it didn't make any difference either.
- Oil to a heavier weight (My car has 214.000 kms)
- New spark plugs (Bosch)
- Throttle Body and PCV to Intake Manifold New Gaskets.
- Fuel Injectors ultrasound cleaning.
- New PCV OEM
- New Cam Position Sensors (both had the wire too exposed due to heat and age)
- New Water Pump
- New Thermostat
- New Belts
- Almost every single hose from cooling system was replaced
- Coolant Expansion Tank and Cap


As far as I can remember those are the main things in the engine bay that were replaced in the last 13k miles since I own this car.

I haven't replaced intake manifold gaskets that go to cylinders, or upper engine part. The car starts fine, but has a rough idle, it doesn't feel smooth as silk as I expected it to be.

Engine mounts are fine just in case.

So, I have no clues of what exactly is going on with this engine.
If anyone knows please let me know.

Thanks

Here a video of my engine doing the noise described above:
https://youtu.be/5rgQGshpBJ0