Acceleration rattling noise

[jonathan]

Hi, i have a problem with my lada samara, engine has low miles, only 35k miles, regularly serviced, i just installed a new water pump and when i started the engine after, it has a rattling noise under heavy acceleration only, its kind of sounds like a calve clearance sound but very hight pitched and noticeable when pressing gas to the floor. Checked valve clearances they are all within limits and the engine from inside looks like brand new. Engine has good power and doesnt smoke at all, starts first turn always.

Topic

[jonathan]

https://youtube.com/shorts/VdPum91ydAU

This is the noise, dont mind the bit of whine in the background i know what it is.

[Author]

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