My engine squeaks after replacing belts - 1991 Bmw 750 (m70 v12)

[Singh263]

I've recently did a top end refresh and I'm almost complete. I went to start the car. It runs and squeaks very loud.

Amongst other parts I've replaced both belts, tensioners and pulleys.

I assume its the belts, any ideas on how to diagnose and fix this?

[PJs e32]

You could rub a soap bar along the edges of the belts, that will be a temporary fix to help diagnose the problem


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[Singh263]

Thanks for the reply I'll give it a go.

Also added a video of it https://youtu.be/CNYFBNEchh0