I guess there's no carem except to try and change the oil pump.

The tool was connected to the computer, no error code.

I can think of a situation that will cause this problem. Could the performance of the oil pump be weakened?
Could the VVT Hub be unable to adjust due to low pressure?

- I just replaced the WP (Aisin), TB idler pulley and tensioner pulley (Volvo OEM) in my 2005 XC90 2.5T. - When the engine runs, the mechanical tensioner moves exactly like the video above, so it is normal to see that movement during engine operation. an xc70 and xc90 with the same engine as my veh...

We tried it out by removing the accessory belt. swaying continues.

all operations were carried out by an authorized volvo workshop. all parts are volvo brand. unfortunately the service workers could not find the reason for this swaying.

by the way I am writing here using google translate. I apologize for the low ratings.

thank you for the answer. All parts of the timing belt. the top CVVT pulleys were replaced with original parts in both cases.

https://youtu.be/7iOHNMyXrLQ Hello to everyone. We could not solve the problem on my car. for this reason I am a member of the site. I hope you help. I have the same problem on the video. the timing set changed, the water pump changed, hub changed, but the vibration continued. all parts were replace...