Cold start in the morning Squeak and rumbling

[xop32]

I have a 2021 transporter 110BHP with 68k miles on it, CXHC Engine , 5 Speed manual

Its just had a new aux belt and aux belt tensioner fitted , and we are still getting a whine/ squeak on cold start which clears after 30 seconds to 1 minute

Also on a cold start in the morning there is also some sort of rumbling comming from the engine area, which again clears when it warms up

I did capture the noises on video , i have uploaded on youtube


Transporter cold engine noise, squeak and rattle - YouTube

These noise both clear when the van warms up, and are only there on a cold start in the morning

cambelt tensioner??

 

[xop32]

what could the rumbling sound be , only on cold start , maybe clutch relaese bearing ??


but why would it clear after a short time and warming up??


or is this normal on a t6.1

 

[xop32]

vw said it was normal