A Very Strange-Sounding Volvo B7TL (SP54 CGU)

Once relaxing and musical, this bus developed a very strange grinding sort of noise a few months ago. Any ideas what it might be?
Operator: McGills Buses
Chassis: Volvo B7TL
Body: Wright Eclipse Gemini
Registration: SP54 CGU (22nd of October 2004)
Fleet No.: 2812
Engine: Volvo D7C (7.3 litres, inline 6)
Gearbox: ZF Ecomat 5-speed
I hope you all enjoy the video!

[@oahengkeva9277]

Okay... Now this us crazy because it has the remanes of the grey black lines that used to be on nxwm buses around 2018

[@ThingsWithEngines]

The Dundee operation used to be run by National Express, so they had the same livery as the NXWM stuff.

[@bustrainchaser93]

That sounds like a B8RLE with that noise! I think it may be a tight engine belt or something as I remember two of our Euro 4-refitted Tridents (18092/8) doing a similar sound way back in 2013. Great vid, hoping to get more of these B7s myself before the BYDs arrive next month!

[@ThingsWithEngines]

Thanks! I was going to reply with some recommendations of which of the B7s to catch, but I see on your channel you've already been. I haven't been on a B8RLE yet, perhaps I should try one and see how it compares.

[@scottishtransportvideos264]

I think it’s the altinator shame because she was a lovely bus

[@ThingsWithEngines]

Still is a lovely bus, I was on it last weekend and everything else sounds perfectly healthy. I actually quite like the noise, it's an interesting sound. And those axles are as sublime as ever :)

[@scottishtransportvideos264]

@@ThingsWithEngines yeah I do agree I quite like it aswell was on her about 2 weeks ago and sounded lovely

[@straygladiator9544]

Alternater by the sounds of things

[@aodhantravels123]

I’m sure a B7TL in the North East used to sound like this but it’s been fixed