Can someone tell me what this engine knock is?

My neighbor is disabled and has a Toyota wheelchair van that developed an engine knock a few weeks ago. The knocking starts gradually after the engine is first started, and it seems to disappear as the RPMs increase. I told him I’ll try to see what it is before he takes it to shop…
Thanks

u/DonPedroHouse — 25 days ago

Gigabyte never disappoints

6 months old (adding matrix 5090 for comparison same time same place)

The reason you don’t see the Matrix under load is because I had to close FurMark to open HWiNFO and take a picture of the values. The AORUS Master has an external screen, so I could just take a photo without closing FurMark. Both were single FurMark runs, although the AORUS 5090 was left running for a few extra seconds.

u/DonPedroHouse — 1 month ago
▲ 302 r/PcBuild

Open frame build

Gigabyte 5090, Ryzen 7 9850x3d, monster studio a45 frame…..

u/DonPedroHouse — 2 months ago